A field-tested guide to manual programming, APRS, ODmaster, TIDRADIOCPS, firmware, troubleshooting, and practical radio operation.
This page documents the configuration, testing, and real-world behavior of the TIDRadio TD-H9, recording observations during actual operation, identifying verified settings, and researching community-reported behavior. Whether you are setting up a new TD-H9 or digging more deeply into one you already use, we hope this field guide makes the radio easier to understand and operate. Firmware updates and operating conditions may change results.
You may agree the TD-H9 manual [sections M1-M3 below] is above average compared with offerings found when unpackaging new transceivers. Firmware updates make this guide necessary, as printing costs may prohibit updates to the printed offering. The ease of using the included computer and app programming software is a pleasant surprise.
Readers looking for more than menu-by-menu instructions are invited to explore the Appendices. The Troubleshooting Guide begins with the most likely causes of common problems; the VHF/UHF Amateur Band Plans place the radio’s frequency coverage in its proper operating and regulatory context; and Setting the Record Straight examines early reviews, later firmware, current capabilities, pricing, and reasonable expectations for owners and prospective buyers.
These sections are set up in the following order for three types of viewers. The Quick Reference card at the top is meant to give you basic settings information. For our visitors who wish to find out a little more: "Why this Setting Exists" could suffice. For our guest who wants to understand related topics, the attempt was made to make the whole picture clearer, entry by entry, in a "Why does this matter?" approach.
The 43 menu entries provide different levels of detail, allowing you to find a setting quickly or continue reading for its purpose, field observations, cautions, and operating context.
Choose the Level of Detail You Need
Level 1: Quick Reference — “Just tell me the setting.”
Level 2: Why This Setting Exists — “Help me understand.”
Level 3: Colored Boxes — “Show me the field observations,
cautions, and operating context.”
What to Expect in the 43 Menus
This guide does not replace the owner’s manual. It adds field observations, operating context, and practical explanations gathered while using the radio.
Each menu can be opened when needed and collapsed afterward, making the 43-menu collection easier to scan and navigate.
Visual cues used throughout the menu entries:
- 📻 Everyday Operation
- 🎓 Operating Knowledge
- ⚙️ Personal Preference
- 🔬 Field Observation — personally verified during testing.
- ✅ Recommendation — practical advice, not dogma.
- ⚠️ Known Issue or Caution
- 🧪 Research & Verification — user feedback is welcomed. Radio amateurs may use QRZ for this purpose.
- 📖 Background
- 💡 Application, Experiment, Operating Practice, or Question
Firmware updates may introduce settings that do not appear in the printed manual. For example, firmware version 1.0.32 added the Morse Code settings documented in this guide.
Typing on the TD H9 Keypad
Use the lower-right keypad button to switch between letter-entry and number-entry modes.
- Short-press a keypad key repeatedly to cycle through the letters or characters assigned to that key.
- Press the Up key to move the cursor one position to the left.
- Press the Down key to move the cursor one position to the right.
- Use the back [UP] or delete control [*DTMF] to remove an incorrect character.
- Press # to confirm and save when the entry is complete.
- Short Press, Don’t Hold Use quick, repeated presses to cycle through the available letters or characters. Holding the key [LONG PRESS] may activate a different function or fail to advance through the character choices.
Because some fields are longer than the visible display area, move the cursor left and right to confirm the beginning and end of the stored value.
Why this setting exists
Without squelch, every FM receiver produces a steady rushing sound known as white noise whenever no station is transmitting. The squelch circuit simply mutes the speaker until a signal becomes strong enough to be useful.
It does not make the receiver more or less sensitive. It only decides when you hear what the receiver is already receiving.
Level 1 completely eliminated the constant white noise while still allowing normal reception during testing. For everyday amateur radio use, I have not found a need to increase the squelch above that setting.
For most amateur radio operators, a low setting provides an excellent balance between listening comfort and hearing weaker stations. Only increase the squelch if unwanted noise repeatedly opens the speaker.
Many new operators believe that increasing the squelch improves reception. It doesn't.
A higher squelch setting simply requires a stronger signal before the speaker turns on. Weak stations may still be reaching the receiver—they just won't be heard.
Simplex vs. Repeater Operation
During repeater operation, almost any squelch setting works because repeaters usually produce strong, reliable signals.
Simplex operation is different. Signals may be weak or noisy, especially over longer distances. This is why you'll sometimes hear operators say:
"Turn your squelch off."
They are not trying to improve the receiver. They're making sure even the weakest signals can still be heard.
Suppose two identical radios are sitting side by side. Both are receiving the same weak signal.
One radio has its squelch set to Level 1. The other is set to Level 8.
Which radio is more likely to let you hear that weak station?
Understanding the answer helps explain why experienced operators often leave their squelch set very low.
Why this setting exists
Step Frequency controls how much the displayed frequency changes each time you tune the radio in VFO mode. It does not affect transmitted audio quality, channel bandwidth, or deviation.
Using an appropriate tuning step simply makes it easier to land on the frequencies commonly used in your area without repeatedly stepping past them.
A setting of 2.5 kHz provides finer tuning than the factory default and has worked well during amateur radio testing. It reduces the chance of skipping over a desired frequency while tuning manually.
Choose the tuning step that best matches the frequencies you use most often. For amateur VHF/UHF operation, many operators prefer a smaller step size for easier manual tuning.
Changing the tuning step does not change your transmit bandwidth or make your signal "narrower" or "wider."
It simply changes how far the displayed frequency moves with each tuning increment.
Suppose you are trying to tune to a repeater that's only a few kilohertz away from your current frequency.
Would you rather move in 25 kHz jumps or 2.5 kHz jumps?
The best tuning step is simply the one that lets you reach your destination with the fewest unnecessary clicks.
Why this setting exists
VOX (Voice Operated Transmit) automatically keys the transmitter whenever the microphone detects sound above the selected threshold. It allows hands-free operation without pressing the PTT button.
Higher sensitivity settings require less sound to trigger the transmitter. Lower sensitivity settings require louder speech before transmission begins.
For normal amateur radio operation, the radio has been operated with VOX turned Off. This prevents accidental transmissions caused by background noise.
Leave VOX turned off unless you specifically need hands-free operation. If enabled, choose the lowest sensitivity that reliably responds to your normal speaking voice.
VOX does not recognize only your voice.
It responds to any sound loud enough to exceed the selected threshold, including vehicle noise, barking dogs, nearby conversations, wind, television audio, or music.
Why Net Controls Often Say "Disable VOX"
During emergency nets and public service events, operators are frequently asked to turn VOX off.
An accidentally triggered transmitter can block other stations from passing traffic and may prevent important messages from getting through.
Using the PTT button ensures that transmissions occur only when the operator intends to transmit.
Imagine driving with the windows down while using VOX.
Could the wind noise key the transmitter even though you never intended to speak?
Understanding that possibility explains why experienced operators generally reserve VOX for situations where hands-free operation is truly needed.
Why this setting exists
People naturally pause while speaking. Without a delay, the radio could stop transmitting between words or sentences, causing parts of your message to be lost.
The VOX Delay keeps the transmitter keyed briefly after your voice stops, making conversations sound more natural.
The factory default of one second provides a good balance between preventing clipped transmissions and minimizing unnecessary airtime.
One second is appropriate for nearly all amateur radio use. Longer delays may be helpful for operators who naturally pause while speaking but will also keep the transmitter keyed longer after each transmission.
VOX Delay does not make VOX more or less sensitive. Sensitivity is controlled by the VOX Level setting. VOX Delay only determines how long the transmitter remains keyed after sound stops.
Listen to experienced operators during nets. Their transmissions sound smooth because the transmitter stays keyed naturally through brief pauses instead of dropping between every sentence.
Why this setting exists
The Time-Out Timer protects both the radio and the repeater system by preventing extremely long transmissions.
If the preset time expires while the PTT is still pressed, the radio automatically stops transmitting.
The 60-second default encourages concise transmissions while providing enough time for normal conversations and most net operations.
Unless you have a specific operating requirement, the factory default is a good choice. Disabling the timer removes an important safeguard against accidental long transmissions.
The Time-Out Timer is not intended to limit conversations. It only limits the length of a single continuous transmission. You can immediately transmit again after releasing the PTT.
Almost every amateur operator has accidentally keyed a microphone while driving or carrying a handheld. The Time-Out Timer limits how long that mistake affects everyone else listening to the frequency.
Why this setting exists
When enabled, the radio transmits a short tone immediately after you release the PTT button.
The tone tells the receiving station that you have finished transmitting. It is not intended for the operator of the transmitting radio.
"I turned Roger Beep on, but I don't hear anything."
The Roger Beep is transmitted to the other station, not played through your own speaker.
This may remind you of the Wire-X setting, a proprietary network feature of a major brand that doesn't transfer well to radios not associated with that same make.
Why this setting exists
The keypad beep provides immediate confirmation that the radio detected a button press. This can be useful when operating without looking directly at the display.
The physical buttons on the TD-H9 already provide good tactile feedback. During testing, the keypad beep was unnecessary and was disabled.
Leaving the keypad beep off makes the radio quieter without affecting its operation. Enable it if you prefer audible confirmation while programming or operating in low light.
The firmware does not provide a separate volume control for keypad beeps. They are either on or off.
Unlike many operating settings, this one has no effect on transmit or receive performance. Choose whichever option makes the radio more enjoyable to use.
Why this setting exists
Most of the time your radio is simply listening. Power Save briefly puts parts of the receiver to sleep, then wakes it repeatedly to check for activity.
Longer sleep intervals reduce battery consumption but may slightly delay the radio's response to an incoming transmission.
The default Level 1 provides a good balance between battery life and receiver responsiveness. During normal amateur radio operation there was little reason to choose a more aggressive setting.
For most operators, the factory default is an excellent choice. Increase the power-saving level only if maximizing battery life is more important than the quickest possible response to incoming signals.
Power Save does not reduce transmitter power. It affects only how the receiver conserves battery power while monitoring the channel.
If you're volunteering for an all-day public service event with limited charging opportunities, experimenting with higher Power Save levels may extend operating time. Test the setting beforehand to make sure it doesn't affect your ability to hear the traffic you're expecting. Carrying an extra battery or two may make for a less stressful event as well. Purchasing straight from the TD-H9 sight may work to your advantage.
Why this setting exists
Handheld radios are often carried on a belt, in a pocket, or inside a backpack. Without a keypad lock, buttons may be pressed accidentally, changing frequencies or menu settings without the operator realizing it.
The TD-H9's Menu/Select button makes it surprisingly easy to change settings unintentionally while exploring the radio. Key Lock can help prevent accidental changes after the radio has been configured.
Leave Key Lock off while learning or programming the radio. Once you're satisfied with the configuration and carrying it regularly, consider enabling the lock.
A locked keypad protects against accidental changes, but it can also slow you down if you frequently switch memories, adjust settings, or navigate menus during operation.
Many experienced operators leave the keypad unlocked while at home, then enable the lock before placing the radio on a belt or in a vehicle where buttons may be pressed accidentally.
Why this setting exists
Dual Watch {Dual Display} allows a single receiver to monitor two displayed frequencies by rapidly switching between them. If activity is detected on one frequency, the radio stops there so you can hear the transmission.
This lets you keep an ear on two channels without manually changing frequencies. You may see a label called Word Mode A or Word Mode B in the choices or programming software. The translator may have meant Display Mode Channel A or B.
The TD-H9 scans between the two displayed frequencies using a single receiver. It is not receiving both frequencies simultaneously.
Leaving Dual Watch enabled provides added flexibility with little downside for most amateur operators. If you monitor only one frequency, disabling it simplifies operation slightly.
Dual Watch is not the same as having two independent receivers. The radio rapidly alternates between two frequencies—it cannot truly receive two simultaneous conversations at once.
Program a local repeater on one display and the national 2-meter simplex calling frequency (146.520 MHz) on the other. Listen for a while and observe how the radio switches between the two frequencies as activity occurs.
Why this setting exists
The TD-H9 can announce menu selections and certain operating functions using spoken voice prompts. This provides audible confirmation without requiring you to look at the display.
The spoken confirmations are clear enough to assist while learning the radio without becoming overly distracting.
Leave Voice enabled while becoming familiar with the radio. After the menus become second nature, many operators choose whichever setting they personally prefer.
Voice prompts affect only the radio operator. They are not transmitted over the air.
If you're still memorizing the menu system, the voice confirmations provide immediate feedback that you've selected the intended menu item.
Why this setting exists
The display backlight improves visibility in low-light conditions but consumes additional battery power. The timer automatically turns the light off after a period of inactivity.
Thirty seconds provided ample time to complete menu changes without the display going dark unexpectedly.
The factory default is suitable for most operating situations.
Longer backlight times improve convenience but slightly reduce battery life.
Why this setting exists
Different lighting conditions require different display brightness. Higher brightness improves visibility outdoors, while lower settings may be more comfortable indoors and conserve a small amount of battery power.
Level 3 produced a comfortable display without appearing excessively bright indoors.
Choose the lowest brightness that remains easy to read in your normal operating environment.
This setting has no effect on transmit or receive performance. Adjust it for your own comfort.
Why this setting exists
The TD-H9 allows you to customize its startup screen. You can display the battery voltage, a custom message, or a stored picture during the power-on sequence.
Unlike many radios, this menu is more about convenience and personalization than radio performance.
Displaying battery voltage at startup provides an immediate indication of battery condition before beginning operation. This is especially useful before a long operating event or road trip.
Voltage is the most practical everyday choice because it provides useful information every time the radio is turned on.
If the displayed voltage is noticeably lower than expected, consider charging the battery before relying on the radio for extended portable use.
Why this setting exists
Different operators prefer different screen layouts. Some emphasize modern graphics, while others prefer a cleaner display that focuses on operating information.
Classic mode removes the large operating box and "OFF" indicator while making the dual-frequency display easier to read. It resembles the familiar layout found on many Baofeng handhelds.
Experiment with all three layouts before deciding. Although Dual is the factory default, Classic may provide a cleaner operating display for everyday amateur radio use.
Switch between the three display modes while monitoring an active repeater. Which layout allows you to find the information you need most quickly?
Why this setting exists
ANI stands for Automatic Number Identification. It originated in commercial land-mobile radio systems where dispatch consoles automatically identified individual radios.
Most amateur repeaters do not use ANI, so many hams never need to modify this setting.
Selecting this menu displayed the value 123. Saving changes uses an ALTER button rather than the more familiar OK button.
Unless you know your organization uses ANI, leave this setting unchanged.
Changing this value has no effect on your FCC amateur radio call sign. It serves a completely different purpose.
Why this setting exists
Some operators prefer seeing the operating frequency, while others prefer descriptive channel names. This menu lets you decide which information is displayed for the A channel.
While learning local repeaters, displaying the frequency can help reinforce where you're operating. After programming meaningful channel names, many operators switch to displaying the names instead.
Try operating with frequencies displayed for a week. Once you recognize the repeaters by memory, switch to channel names and see which format you prefer.
Why this setting exists
This menu functions exactly like Display Type A, except it applies to the lower line of the display. Each display can be configured independently.
Using the same display style for both the A and B displays creates a more consistent operating experience and reduces visual clutter.
Unless you have a specific reason to display different information on each line, consider using the same display format for both A and B.
If one display is dedicated to a local repeater and the other to a simplex frequency, you may find it helpful to configure each display differently to suit its purpose.
Why this keypad-setting exists
DTMF stands for Dual-Tone Multi-Frequency. Each key on the keypad generates a unique pair of audio tones. These are the same type of tones used by touch-tone telephones.
In amateur radio, DTMF tones are commonly used to control repeaters, link systems, autopatches, and other remote equipment. The Side Tone setting simply determines whether you hear those tones as they are transmitted.
Turning Side Tone off does not prevent the radio from transmitting DTMF digits. It only mutes the tones from your own speaker.
Leave Side Tone enabled while learning DTMF. Hearing the tones provides immediate confirmation that the keypad registered your entry correctly.
DTMF Side Tone is often confused with Roger Beep. They are completely different features.
- Roger Beep sends a single tone after you finish talking.
- DTMF transmits a unique pair of tones for each keypad button.
See Menu 6 – Roger Beep for another feature that produces transmitted tones, but for a completely different purpose.
Why this setting exists
Some repeaters require a fraction of a second to begin transmitting after they detect your signal. If you begin speaking immediately after pressing PTT, the first word—or even the first syllable—may be clipped.
The factory default of 100 milliseconds works well for most repeaters. Systems with slower linking or remote receivers may benefit from a slightly longer delay.
Leave the default setting in place unless you consistently notice that the beginning of your transmissions is being cut off.
Even with PTT Delay enabled, develop the habit of pressing the PTT button, pausing briefly, then speaking. Experienced operators naturally build this short pause into every transmission.
Why this setting exists
The TD-H9 is marketed worldwide. This setting allows operators to select the language used by the menu system and spoken prompts.
Select the language that allows you to navigate the menus most comfortably. This setting affects only the user interface and has no effect on radio performance.
If someone accidentally changes the language, don't panic. The radio is still operating normally—you simply need to navigate back to the Language menu.
Why this setting exists
Some commercial radio systems use emergency alarm functions to alert dispatch centers or other radios. The TD-H9 retains this capability even though most amateur operators never use it.
This is not an emergency call button for amateur radio. Selecting TX Alarm may transmit an alarm signal over the air, which can be disruptive if activated accidentally.
Leave the radio set to One Site unless you specifically use a system designed to recognize transmitted alarm signals.
Many modern amateur handhelds inherited features from commercial land-mobile radios. Alarm Mode is one example of a feature that most hams will never need but remains available.
Why this setting exists
When an FM signal disappears, many receivers briefly produce a burst of white noise before the squelch closes. STE attempts to reduce or eliminate this "squelch tail."
STE does not improve weak-signal reception, reduce static, or increase receiver sensitivity. It only affects the sound heard at the instant another station stops transmitting.
Leave STE enabled unless you have a specific reason to disable it.
Monitor an active repeater while toggling STE on and off. Listen carefully for the brief noise burst at the end of each transmission.
Why this setting exists
Before Continuous Tone-Coded Squelch System (CTCSS) became common, many repeaters—especially in Europe—used a brief 1750 Hz tone to activate the repeater.
North American amateur operators rarely need this feature. The factory default is appropriate unless your local repeater specifically requires a different tone.
The 1750 Hz access tone remains common enough internationally that many modern radios continue to include it, even though most North American repeaters now rely on PL, CTCSS or DCS tones.
- PL (phone link)
- Sub-audible tone that tells the repeater to listen and retransmit.
- CTCSS
- Sub-audible tones that tells the repeater to listen and retransmit using its own sub-audible tone.
- DCS
- Digital-Coded Squelch tones that tells the repeater to listen and retransmit using its own digital encoding tone.
Here's the GOTCHA!
If you set your radio for Repeater Tone Out and Repeater Tone In (CTCSS), but the repeater is set only for Repeater Tone In, YOUR radio will be listening for that Repeater Response. If your radio doesn't hear the sub-audible tone, it won't "hear" the repeater's transmission.
PL and CTCSS are often used synonomously, which is unfortunate for the new hams who can't figure out if they should use one or two PL settings. This made categorizing types of repeaters at my "Find Repeaters On The Road" site challenging.
Why this setting exists
Normally, a repeater receives on one frequency and retransmits on another. Talk Around temporarily bypasses the repeater so nearby radios can communicate directly without using the repeater's input frequency. In effect, it makes the repeater frequency into a temporary simplex frequency,no audible tones are sent so the repeater doesn't get involved.
This feature is most useful when everyone is close together or when the repeater is unavailable. It is rarely used during normal repeater operation.
Leave Talk Around turned off for everyday repeater use. Enable it only when you intentionally want direct simplex communication.
Imagine a friend standing on top of a water tower repeating everything you say. Talk Around tells the radios, "We're close enough now—we can just talk directly."
Why this setting exists
The TD-H9 includes an FM broadcast receiver for listening to commercial FM radio stations. This setting determines how that receiver interacts with normal two-way radio operation.
The factory default is Off. Additional testing is needed to fully document the behavior of this feature during FM broadcast reception.
The owner's manual provides only limited information about this feature. The exact operating behavior should be verified through additional testing before relying on it.
Leave this setting at its default value unless you have a specific need to change how the FM broadcast receiver behaves.
Why this setting exists
Programmable function buttons provide quick access to frequently used features without requiring the operator to open the menu system.
The best assignment depends on how the radio is used. An operator who frequently changes transmit functions may prefer PTT2, while another may prefer quick access to the flashlight, weather receiver, FM radio, or repeater tone burst.
The tested radio opened with PTT2 assigned to PF1 Short Press.
Leave the factory assignment in place until you know which function you would use more often. Once a pattern develops, assign the button to the feature that otherwise requires the most menu navigation.
According to the manual, assigning PTT2 or OD PTT to PF1 Short Press prevents a separate PF1 Long Press function from being assigned.
A programmable button is most useful when it replaces a task you perform repeatedly. Avoid assigning a feature simply because it sounds interesting; choose one that saves time during actual operation.
Why this setting exists
A long-press assignment allows one physical button to perform a second task. This can provide quick access to features such as the flashlight, weather receiver, tone burst, FM radio, alarm, or temporary squelch cancellation.
Pressing the Menu/Select button while viewing this setting produced a Reject message on the tested radio.
PF1 Short Press was assigned to PTT2 at the time.
The manual states that PF1 Long Press cannot be assigned when PF1 Short Press is set to PTT2 or OD PTT.
The Reject message therefore appears consistent with the current PF1 Short Press assignment.
Leave this setting unchanged while PF1 Short Press is assigned to PTT2. To test a long-press assignment later, first change PF1 Short Press to a non-PTT function, then return to this menu.
See Menu 27 — PF1 S Press. The short-press assignment determines whether this long-press menu is available.
Why this setting exists
PF2 provides another programmable shortcut. Its assignment can complement PF1 by placing two frequently used features within easy reach.
The factory assignment opens the commercial FM broadcast receiver without requiring the operator to find it in the menu system.
The tested radio opened with FM Radio assigned to PF2 Short Press.
Keep FM Radio assigned if you use the broadcast receiver. Otherwise, consider assigning Weather, Lamp, or another function that better matches your normal operating habits.
As with PF1, assigning PTT2 or OD PTT to PF2 Short Press may prevent a separate PF2 Long Press assignment.
Consider giving PF1 and PF2 different roles. One might control a radio operating function while the other opens a convenience feature such as Weather, Lamp, or FM Radio.
Why this setting exists
PF2 Long Press allows the same physical button to operate a second feature. The default setting of None prevents an unexpected action when the button is held accidentally.
The tested radio opened with no long-press function assigned to PF2.
Leaving this setting at None is a sensible starting point. Assign a function only after identifying one that would be genuinely useful during normal operation.
Cancel Sq may be useful as a temporary squelch-monitor function. Holding the button can help determine whether a weak signal is present below the normal squelch threshold.
Why this setting exists
The additional programmable top button provides another shortcut without using either side key. Its location can make it convenient when the radio is clipped to a belt or held in one hand.
The tested radio opened with Weather assigned to Top Short Press.
This menu is present in Radio Firmware 1.0.32 but is not listed in the corresponding Radio Settings section of the printed booklet.
Weather is a practical assignment for operators who frequently monitor NOAA weather broadcasts. Keep the default until the complete choice list has been documented and another function proves more useful.
A dedicated Weather shortcut can be useful during outdoor events, travel, Skywarn activity, or any operation where conditions may change quickly.
Why this setting exists
The menu name suggests that the top button may support a second function when held. However, the conditions required to make that assignment available have not yet been established.
Pressing the Menu/Select button while viewing Top Long Press produced a Reject message on the tested radio. It would appear that the short-press setting must be filled first.
Do not assume that Reject indicates a hardware failure. Similar behavior occurs when a programmable-key assignment conflicts with another setting or when a required option has not been enabled.
Additional testing is needed to determine whether changing Top Short Press makes this menu available, whether only certain short-press choices permit a long-press assignment, or whether the function is incomplete in this firmware.
Operators who have verified this behavior on Radio Firmware 1.0.32 or later are invited to share their test method and results through the contact information associated with the AA4TE QRZ listing.
Why this setting exists
Different operators speak at different volumes and hold their radios at different distances. Microphone gain provides a way to compensate for those differences.
A higher setting generally produces stronger transmitted audio from the same speaking level. That does not necessarily mean that the transmitted signal travels farther. It changes the audio level applied to the transmitter, not the radio-frequency output power.
Too little gain can make an otherwise strong signal sound quiet or difficult to understand. Too much gain can overload the audio circuitry, exaggerate background noise, or produce harsh and distorted speech.
The manual describes a range of 0 through 9 and indicates that higher levels provide greater microphone gain.
The factory value and the most natural-sounding setting on Radio Firmware 1.0.32 have not yet been confirmed through an on-air comparison.
Begin with the factory value. Change it only after receiving an audio report from another operator or listening to a recording made with a second receiver.
Make small adjustments and compare speech clarity rather than loudness alone. The best setting is the one that sounds clean and intelligible without distortion.
Increasing microphone gain does not increase transmitter wattage or improve the radio-frequency path. It can make your voice louder at the receiving radio, but excessive gain may actually make communication less understandable.
Transmit the same sentence at several gain levels while recording the signal on another radio or an SDR. Keep the microphone the same distance from your mouth during every test.
Listen for clarity, background noise, clipping, and changes in volume. A repeated phrase such as “Testing microphone gain at level four” makes the recordings easier to compare.
Why this setting exists
DTMF stands for Dual-Tone Multi-Frequency. It is the same basic signaling system traditionally associated with touch-tone telephones.
Each digit is represented by two audio frequencies transmitted simultaneously. Radio systems can use those tones for repeater control, telephone interconnects, remote commands, autopatch operation, or commercial-style individual and group calling.
When a radio sends several stored digits automatically, each receiving decoder needs enough time to recognize one digit before the next begins. DTMF Speed controls that timing.
The manual lists 110 milliseconds as the default. It also states that increasing the rate value slows the transmitted DTMF sequence.
The complete list of values displayed by Radio Firmware 1.0.32 has not yet been recorded.
Leave this setting at 110 ms unless a repeater controller, autopatch, or selective-calling decoder consistently misses digits.
When troubleshooting, first confirm that the programmed DTMF sequence is correct. If the digits are correct but the receiving equipment fails to decode them reliably, try a slower setting.
Sending digits too quickly can cause older or less tolerant equipment to miss part of the sequence. Sending them unnecessarily slowly usually works, but makes the signaling sequence take longer and occupies the channel for additional time.
DTMF was designed so telephone exchanges could identify numbers more reliably and quickly than rotary dialing. Two tones are used for every key, making the signal easier to distinguish from ordinary speech and background noise.
Amateur and commercial radio manufacturers adopted the same system because the tones were already standardized and relatively easy for electronic equipment to generate and decode.
Why this setting exists
A conventional analog channel allows everyone monitoring the frequency to hear the same transmission. DTMF selective calling adds an addressing layer by sending a sequence of tones associated with an individual radio, work group, or calling function.
With DCD enabled and the related identity codes properly configured, the radio can decode compatible DTMF signaling and react to a call intended for that code.
This resembles a telephone extension or pager number. It does not make the voice conversation private; it merely helps signal which radio or group is being called.
The documented factory setting is Off. When disabled, the radio does not use its DTMF selective-calling decoder.
A complete two-radio test is still needed to establish how the TD-H9 indicates a successful call, which programmed codes it compares, and how this setting interacts with D-HOLD and D-RSP.
Leave DCD Off for ordinary amateur repeater and simplex operation.
Enable it only when deliberately experimenting with the radio’s DTMF individual-call or group-call system and after configuring compatible identity and calling codes in both radios.
DTMF selective calling does not encrypt or scramble the conversation. Other receivers on the frequency can still hear the transmission even when they are not configured to respond to the addressing tones.
The clearest test requires two compatible radios. Give each radio a different identity code, enable DCD, and send an individual call from one radio to the other.
Then repeat the test with an incorrect code. Record whether the receiving radio rings, opens its speaker, displays an identifier, or sends a response. This will reveal more than the brief manual description.
Why this setting exists
After a radio recognizes a valid DTMF selective-call sequence, it may ring, open its speaker, display a call indication, or otherwise enter a temporary called state.
D-HOLD establishes how long that condition remains active before the decoder automatically returns to its normal waiting state.
A short hold period clears the call indication quickly. A longer period gives the operator more time to notice and respond, but may leave the radio in the called state longer than necessary.
The manual describes this setting as the DTMF Auto Reset Time and lists a range of 5 to 60 seconds.
The factory value and the exact visible behavior during the hold interval have not yet been confirmed on the tested radio.
Leave the factory value unchanged for normal operation. This setting has no practical benefit while DCD remains disabled.
For selective-calling experiments, begin with a moderate interval such as 10 or 15 seconds. That should provide enough time to observe the radio’s response without leaving the called condition active for an excessive period.
D-HOLD does not independently enable DTMF calling. Its effect depends on DCD, programmed identity and calling codes, and the response selected in the following DTMF settings.
Menu 35 enables DTMF decoding. Menu 36 controls the automatic reset interval after a successful decode. The following response setting determines what the radio does when it recognizes the call.
These menus should be tested together rather than treated as unrelated controls.
Why this setting exists
DTMF selective calling allows a radio system to address an individual radio or group by transmitting a programmed sequence of touch-tone-style signals.
After the TD-H9 recognizes a valid sequence, D-RSP determines what happens next. The radio can provide an audible notification, transmit a brief acknowledgment, perform both actions, or take no additional action.
This type of signaling is common in commercial and public-service radio systems where several users may share one channel but need a way to call a particular person, vehicle, or work group.
The documented factory setting is NULL, which produces no special response after a valid DTMF decode.
The available choices are described as follows:
- NULL — no audible or transmitted response
- RING — sound an alert after decoding the call
- REPLY — transmit a brief automatic acknowledgment
- BOTH — sound the alert and transmit the acknowledgment
A complete two-radio test is still useful for documenting the exact alert sound, display behavior, acknowledgment content, and timing on Firmware 1.0.32.
Leave D-RSP set to NULL for ordinary amateur repeater and simplex operation.
Use RING when experimenting with DTMF selective calling and you want a local notification without causing the radio to transmit automatically.
Use REPLY or BOTH only in a controlled test after confirming that automatic acknowledgment transmissions are appropriate on the selected frequency.
The REPLY and BOTH choices may cause the radio to transmit automatically after decoding a valid call.
That transmission can occur even though the operator did not press the PTT button. Test these choices on an appropriate simplex frequency or other controlled setup before using them during normal repeater operation.
D-RSP is the final part of a group of related DTMF settings:
- DCD enables the selective-call decoder.
- D-HOLD determines how long the decoded-call state remains active.
- D-RSP determines what the radio does after recognizing the call.
These settings have little practical meaning when tested individually. Their behavior becomes clear only when two compatible radios are programmed with matching DTMF identities and calling sequences.
Why this setting exists
Most analog voice communication heard on amateur handheld radios uses frequency modulation, or FM. Civil aviation voice communication in the approximately 108–136 MHz air band instead uses amplitude modulation, or AM.
A receiver must use the correct demodulation method to reproduce the audio properly. An aircraft transmission received in FM mode may still produce noise or fragments of speech, but it can sound weak, distorted, uneven, or difficult to understand.
Enabling AM_BAND tells the radio to use AM reception when tuning within the supported aviation range.
With AM_BAND enabled, aviation transmissions should sound more natural and intelligible than when the same signals are processed as FM.
Reception quality will still depend on distance, terrain, antenna efficiency, aircraft altitude, nearby transmitters, and the TD-H9’s receiver performance.
The feature should be tested with several known air-band frequencies to determine whether the radio switches to AM automatically throughout the supported range or only when this menu is enabled.
Set AM_BAND to ON when using the TD-H9 to monitor civil aviation communications.
There is little reason to disable it unless testing receiver behavior or troubleshooting an unusual firmware issue.
This setting should be treated primarily as a receiving feature. The ability to enter or hear an aviation frequency does not authorize transmission on that frequency.
Aircraft communication frequencies are used for safety-critical operations. Do not transmit on them unless properly authorized and operating approved aviation equipment under the applicable rules.
One practical characteristic of AM is that two overlapping transmissions may sometimes both be noticed as mixed or interfering audio.
With FM, the receiver’s capture effect often allows the stronger signal to suppress the weaker one almost completely. In aviation, hearing evidence that another station transmitted at the same time can be important, even when neither message is fully understandable.
That is not the only reason AM remains established in aviation, but it is one useful operational distinction between air-band AM and ordinary handheld FM communication.
Why this setting exists
Manufacturers sometimes use one hardware and firmware platform for radios sold into several markets or configured for different services.
A software option may therefore expose a wider tuning or frequency-entry range than the radio normally presents to the user.
The label 200TX suggests expanded access around the 200 MHz region. However, the menu name alone does not establish the precise usable range, receiver performance, transmitter performance, certification status, or legal operating privileges.
The factory setting is OFF.
Additional testing is needed to document the exact lower and upper frequency limits exposed when this setting is enabled, whether the change affects receive and transmit entry equally, and whether the radio actually produces usable output across the displayed range.
A frequency appearing on the display is not proof that the transmitter is clean, stable, efficient, or suitable for use there.
Leave 200TX set to OFF unless you have a specific lawful purpose, understand the applicable frequency allocation, and can verify the radio’s technical behavior with suitable test equipment.
For routine amateur operation, enabling a broad hidden range provides little benefit and increases the chance of accidental out-of-band transmission.
A radio accepting a frequency does not grant permission to transmit on it.
Only limited portions of the broader 200 MHz region may be allocated to amateur radio in a particular country. Other nearby frequencies may belong to aviation, public safety, government, commercial, satellite, or other services.
The operator remains responsible for knowing the authorized band limits, license requirements, emission rules, power limits, and equipment restrictions that apply locally.
Confirm all three of the following:
- Your license and local regulations authorize operation on the intended frequency.
- The TD-H9 is technically and legally suitable for transmitting there.
- The attached antenna is appropriate for that frequency range.
If any one of those conditions is uncertain, leave the menu disabled and use the radio only as permitted in its normal configuration.
Why this setting exists
A manufacturer may use the same hardware and firmware platform for amateur, commercial, export, government, or engineering configurations.
The 350TX option appears to expose frequencies around the 350 MHz region. At 350 MHz, the approximate wavelength is 86 centimeters, but “86 centimeters” is only a wavelength description. It is not the name of a standard international amateur band.
This range is more commonly associated with government, military, fixed, public-safety, and professional land-mobile communications than with amateur radio.
The factory setting is OFF.
The exact frequency limits, receiver sensitivity, transmitter output, harmonic performance, and antenna suitability have not been verified on the tested radio.
Enabling the option should therefore be treated as a technical experiment rather than an ordinary operating adjustment.
Leave 350TX set to OFF.
This region is not part of the normal U.S. amateur allocations and is not identified as a standard amateur band in the usual IARU regional band plans.
Even where frequencies in this region are actively used in another country, they are commonly assigned to government, military, public-safety, or licensed professional systems rather than amateur operators.
The existence of radio activity near 350 MHz in another country does not mean that visiting or local amateur operators may use it.
Many systems in this region are safety-related, governmental, military, or professionally licensed. Unauthorized transmission could interfere with services that have no connection to amateur radio.
Keep this option disabled unless the intended frequency, service, and equipment authorization have all been positively verified.
Frequencies in and around the 350–400 MHz region are used internationally for combinations of government, military, fixed, mobile, public-protection, and emergency-service communications.
In parts of Europe, nearby spectrum in the broader 380–400 MHz region is associated with public-protection and disaster-relief networks.
These examples explain why the radio may contain the capability, but they do not make the range available for amateur use.
Why this setting exists
The 500TX option appears to expose higher-frequency operation that may be intended for export models, professional configurations, factory testing, or other radio products based on related hardware.
At 500 MHz, the approximate wavelength is 60 centimeters. However, “60 centimeters” is only a wavelength description and should not be confused with a recognized amateur-band name.
The broader 500 MHz region is commonly used for television broadcasting, land-mobile systems, programme-making equipment, and other nationally assigned services.
The factory setting is OFF.
Testing is still needed to establish the exact frequency range exposed by the option and whether the radio permits actual transmission throughout that range or merely accepts frequency entry.
The radio’s stock antenna and output filtering should not be assumed to perform correctly simply because the display accepts a frequency.
Leave 500TX set to OFF.
This region is outside the normal U.S. amateur allocations and is not a standard amateur band in the usual international regional band plans.
Enable it only for carefully controlled and lawful technical research after verifying the applicable allocation, equipment suitability, antenna system, and transmitter performance.
Frequencies around 500 MHz are commonly occupied by television broadcasting, land-mobile systems, wireless production equipment, and other licensed services.
In some countries, portions of the wider 470–694 MHz region are used for digital terrestrial television and related secondary services.
These are not open amateur channels. Accidental transmission could interfere with broadcast or professional communications.
- Authorization: Your license and national regulations permit operation on the exact frequency.
- Equipment suitability: The TD-H9 is legally and technically appropriate for that service and emission.
- RF performance: Frequency accuracy, output power, occupied bandwidth, harmonics, and spurious emissions have been verified.
Without all three, the correct choice is to leave 500TX disabled and not transmit.
Why this setting exists
Firmware is the internal software that controls the radio’s menus, display, button behavior, Bluetooth functions, frequency handling, and many other operating details.
Two radiosthat look identical may behave differently when they contain different firmware versions. Menu numbering, factory defaults, available choices, error messages, and programming compatibility can all change after an update.
Displaying the installed version gives the operator an essential reference when troubleshooting or comparing observations with another owner.
The radio used for this field guide displays Firmware Version 1.0.32.
The printed manual does not always match the menu order or behavior found in this firmware. Some menus appear in different positions, and later firmware features may not be documented in the booklet supplied with the radio.
Record the displayed firmware version before changing settings, using programming software, performing an OTA update, or beginning a troubleshooting session.
After an update, return to Menu 42 and confirm that the displayed version changed as expected.
A firmware update may change menu defaults, stored settings, Bluetooth behavior, button assignments, memory-channel handling, or other internal data.
Back up the radio when practical and record important settings before updating. Afterward, verify critical operating values rather than assuming they remained unchanged.
When documenting a problem, include:
- the exact firmware version;
- the programming method used;
- the app or software version;
- the menu number and on-screen wording;
- the setting selected;
- and the behavior observed.
That information turns “my radio does something strange” into a repeatable observation that another operator can meaningfully test.
Why this setting exists
A radio sitting quietly may provide little visible indication that it is still powered. Breath LED appears to be a translation difficulty. In the programming software, it's listed as Breadth LED. This Standby Flash Interval LED creates a periodic flash that acts as a standby or location indicator.
The feature can make the radio easier to find in a dark room, vehicle, tent, equipment bag, or emergency kit. It may also reassure the operator that the radio has not shut down.
The tradeoff is that every flash consumes a small amount of energy and may be distracting or undesirable in low-light situations.
On Firmware 1.0.32, this menu provides an option to disable the standby flash and may provide several timing intervals.
The exact interval choices, LED color, flash duration, and interaction with scanning, Bluetooth, receiving, charging, and low-battery warnings should be documented directly from the tested radio.
Set Standby LED/Breath LED to OFF for ordinary operation.
Enable it only when the periodic location or power-status indication is useful. When enabled, choose the longest practical interval to reduce distraction and unnecessary battery use.
A flashing LED may attract attention in a dark room, theater, vehicle, campsite, public event, or nighttime operating position.
It can also reflect from windows or nearby surfaces and become more distracting than expected. Consider the operating environment before enabling it.
The value of this feature depends entirely on how the radio is used.
For a radio kept beside a bed, in an emergency kit, or on a dark equipment table, the occasional flash may be useful. For a radio carried throughout the day, the same flash may provide no real benefit.
A simple overnight comparison can reveal whether the feature has a noticeable effect on battery life and whether the light is helpful or merely irritating.
See Appendix B — VHF/UHF Amateur Band Plans for United States and United Kingdom allocations, calling frequencies, repeater practices, operating cautions, and comparisons.
About these settings
The TD-H9 APRS menu contains seven numbered sections. The settings below follow the same order shown on the radio.
Values identified as observed were found on the tested radio running firmware 1.0.32. They should not automatically be treated as factory defaults unless the radio or manual clearly identifies them that way.
Why this section is included
APRS is often described as a tracking system, but that description is too narrow. APRS is better understood as a messaging and information-sharing system designed to distribute short, useful reports between stations.
Those reports can include position, identity, status, short text messages, weather observations, telemetry, objects, events, bulletins, and emergency information.
The TD-H9 approaches APRS differently from a traditional packet-radio station. Some of its APRS-related functions depend on Bluetooth, the ODmaster application, a phone’s location services, and an internet connection.
This chapter separates the information being shared from the path it follows. That distinction is essential because seeing a station on an APRS map does not necessarily mean that the station transmitted an APRS packet over an amateur-radio frequency.
APRS information should be treated as public. Position reports, messages, weather data, comments, and status text may be received by nearby stations, transferred to internet servers, displayed on public maps, archived, copied, or redistributed.
Do not send medical information, private personal details, passwords, access codes, security-sensitive locations, law-enforcement information, or anything that should remain confidential.
This guide calls APRS a messaging system because it carries many forms of short information—not just text messages between operators.
A position packet is a message about location. A weather report is a message about conditions. A status packet is a message about station activity. APRS text messaging is one part of that larger system.
What APRS actually does
APRS allows stations to exchange short reports in a standardized format. Those reports are designed to be processed by radios, computers, mapping programs, internet servers, emergency-communications systems, and other compatible applications.
A station may report where it is, what it is doing, what the weather is like, whether an event is active, or whether a resource has arrived at a particular location.
The receiving station does not necessarily need to hear a voice transmission. APRS information is normally encoded as digital data that software can interpret and display.
Why “automatic” is in the name
Many APRS reports can be sent automatically. A mobile tracker may periodically transmit its location. A weather station may report temperature, pressure, rainfall, and wind. A fixed station may send a status report at scheduled intervals.
Automatic reporting does not mean that every APRS station transmits continuously. The operator or device determines when information is sent, what information is included, and which communication path is used.
Operators often first encounter APRS as moving call signs on a map. That makes it easy to assume that APRS exists primarily for vehicle tracking.
In practice, mapping is only one presentation layer. The underlying system can carry many kinds of short operational information even when no moving station is involved.
Configure and verify APRS in stages:
- Confirm the radio firmware version.
- Pair the correct radio through Bluetooth.
- Enter the correct amateur callsign and SSID.
- Confirm symbol and station information.
- Grant only the necessary phone permissions.
- Verify that the displayed position is current.
- Determine whether the information travels over RF, the internet, or both.
- Check the packet or report on the intended receiving system.
Seeing your station in ODmaster or on an internet map does not prove that the TD-H9 transmitted an APRS packet over an amateur-radio frequency.
Use a second receiver, packet decoder, network-path information, or another repeatable test to establish what actually occurred.
When troubleshooting, ask:
- Did the radio connect?
- Did the application obtain a valid position?
- Did the application create a report?
- Did the radio transmit anything?
- Did the internet service receive anything?
- Did the map display the current report?
Answering those questions individually is much more effective than repeatedly changing settings at random.
An APRS map may show the most recently received position rather than the station’s present location.
A position can become stale because the station stopped beaconing, moved out of range, lost internet access, lost GPS information, closed its phone application, or had its packets missed by the network.
Always check the timestamp before treating a displayed position as current.
Imagine a public bulletin board where stations post short updates. Some posts say, “I am here.” Others say, “The weather is this,” “The command post is operational,” or “Please send a reply.”
The bulletin board may be reached by radio, internet, or both. The important point is the information being posted—not merely the map on which it eventually appears.
Position reports
A position report can identify where a station was located when the report was created. Depending on the equipment and configuration, it may also include course, speed, altitude, symbol, status, or a short comment.
A moving station may send repeated reports. A fixed station may send the same position occasionally so other stations know that it remains available.
Short text messages
APRS supports short operator-to-operator messages. These messages may be sent between compatible radios, software applications, internet-connected clients, or combinations of those systems.
An APRS message is not the same as a mobile-phone text message. Delivery is not guaranteed, and a message may be delayed, repeated, acknowledged, or never received.
Weather observations
Weather stations can distribute observations using APRS-compatible formats. Reports may include temperature, humidity, wind direction, wind speed, rainfall, and atmospheric pressure.
Some weather stations transmit over amateur radio. Others send their information through the internet into systems that share data with APRS-related servers and mapping services.
Objects and items
APRS can display more than licensed radio stations. An operator may create an object or item representing a location or resource.
Examples include:
- a county command-post trailer;
- an emergency shelter;
- a public-service checkpoint;
- a road closure;
- a hazardous area;
- a meeting location;
- or a temporary event station.
The transmitting station remains responsible for the object even though the object may appear on a map under a tactical or descriptive name.
Status, bulletins, and telemetry
A status report can provide a brief description such as “Monitoring,” “Command Post Operational,” or “Weather Station Online.”
Bulletins can distribute information to multiple users, while telemetry can report equipment or sensor measurements.
A map label such as COUNTY-CP may be useful operationally, but it does not eliminate the amateur station’s identification responsibilities.
The licensed station responsible for transmitting the information must still be identifiable in accordance with the applicable amateur-radio rules.
A county EmComm group could use APRS to report the location or status of a communications trailer, command post, damage-assessment team, shelter, or other volunteer resource.
The information should be limited to material that may safely be disclosed over a public, unencrypted system.
The information and the path are separate
A position report is the information. Radio, Bluetooth, a phone application, an internet server, a digipeater, and an IGate are possible parts of the delivery path.
Two identical-looking symbols on an APRS map may have arrived through completely different systems.
Tracker or APRS radio amateur-radio frequency digipeater or IGate APRS-IS map or application
Radio or phone application Bluetooth or local data connection phone internet connection APRS-IS or related service map or application
Weather sensors weather console or cloud service internet weather network or CWOP APRS-compatible data system aprs.fi or another display
A station’s appearance on aprs.fi does not prove that the station transmitted an APRS packet over amateur radio.
The information may have been entered through APRS-IS, a phone application, a weather service, CWOP, or another internet-connected system.
The final map display may look the same whether the data arrived over radio, through the internet, or through a hybrid path.
Before describing a station as “transmitting APRS,” determine whether an amateur RF transmission actually occurred.
When investigating how a station reached an APRS map, examine:
- the station identifier;
- the packet path;
- the timestamp;
- the source or gateway information;
- the comment or software identifier;
- and whether an RF gateway appears in the path.
No single field always tells the complete story, but the combination often reveals whether the report came from RF, the internet, or both.
RF APRS
Traditional RF APRS transmits packet data over an amateur-radio frequency. In much of the United States, terrestrial APRS activity commonly uses 144.390 MHz, although frequencies and practices vary by country and application.
The signal may be heard directly by another station, repeated by a digipeater, or received by an IGate that forwards the packet to APRS-IS.
RF APRS can continue working locally when cellular and internet systems are unavailable, provided that the radio infrastructure and participating stations remain operational.
APRS-IS
APRS-IS is the internet-based network used to exchange APRS data among compatible servers and applications.
A phone or computer application may place information onto this network without transmitting an amateur-radio signal. Internet-connected weather services may also contribute compatible observations.
IGates connect the two worlds
An IGate receives suitable APRS packets over radio and forwards them to APRS-IS. Some properly configured systems may also gate selected information from APRS-IS back to radio.
That connection allows a local RF station to appear on internet maps and permits information from a distant station to reach applications far beyond the original radio coverage area.
A phone-connected radio may appear to be performing traditional APRS even when the phone supplies the location and the internet carries the report.
The user should verify whether the radio actually transmits a packet over RF or merely serves as a Bluetooth accessory for the application.
A phone application that depends on cellular data may stop reporting during an internet or mobile-network outage.
For emergency communications, document which functions require the internet and which can operate independently over amateur radio.
Send a test position under controlled conditions and then repeat the test with:
- Bluetooth enabled and internet available;
- Bluetooth enabled but mobile data and Wi-Fi disabled;
- the application closed;
- location permission removed;
- and a second receiver monitoring the expected APRS frequency.
The results will help distinguish what the radio does, what the phone does, and what the internet service does.
The radio is only one part of the system
The TD-H9 can connect to ODmaster through Bluetooth Low Energy. The application provides configuration, mapping, account, status, and APRS-related functions that are not all performed independently by the handheld radio.
A complete APRS operation may therefore involve:
- the TD-H9 radio;
- the ODmaster application;
- the phone’s Bluetooth connection;
- the phone’s location service;
- background-operation permission;
- mobile data or Wi-Fi;
- and an APRS-compatible internet service.
TD-H9 Bluetooth ODmaster phone location and internet APRS-related service or map
Bluetooth does not automatically mean APRS is working
A successful Bluetooth connection establishes communication between the radio and application. It does not guarantee that the callsign, SSID, location, account, beacon settings, or network connection are correct.
APRS operation should be verified as a complete chain rather than judged solely by the Bluetooth symbol.
The phone may supply the position
When an application uses the phone’s location service, the position shown or reported may come from the phone rather than from a GPS receiver inside the radio.
If location permission is denied, disabled, or limited to foreground use, automatic position reporting may stop when the application is minimized or the phone is locked.
Background operation matters
Modern phones may suspend applications to conserve battery power. An APRS-related function that works while ODmaster is open may stop after the phone screen turns off unless background operation is permitted.
Battery-saving settings, application restrictions, Bluetooth permissions, and location permissions can all affect operation.
I. The radio was first programmed from the Windows CPS software through the computer-to-radio cable connection. Getting Windows to accept an earlier version of the Prolific USB driver (v32.0.0) was the only difficult portion of the process. Using the CPS software was quite intuitive.
🖒 When ODmaster was opened afterward and connected to the same radio by Bluetooth LE, the updated radio settings were already visible in the Program & Setting tab. 🖒
II. This suggests that ODmaster reads the current configuration stored in the radio rather than maintaining a completely separate programming file.
ODmaster includes APRS map and Bluetooth configuration functions along with radio programming, status, profile, OTA, and background-operation features.
The exact division of labor between Firmware 1.0.32 and the current application version should be verified by controlled testing rather than inferred from the presence of an APRS button or map.
What MIC-E does
MIC-E is an APRS packet format designed to carry position, movement, symbol, and a compact position comment while using less packet space than a typical uncompressed position report.
Part of the position information is encoded in fields that may look unusual when the raw packet is viewed. APRS-aware radios, software, iGates, and websites decode those fields before displaying the location and status.
On the TD-H9, MIC-E Start turns this packet format on or off. MIC-E Type selects the short operating-status description included with the report.
What MIC-E does not do
MIC-E does not obtain a satellite fix, choose between live and stored coordinates, set the beacon interval, select the APRS transmit channel, or determine whether a digipeater or iGate receives the packet.
A receiving website can correctly decode the MIC-E format while the coordinates inside that packet are old, fixed, or otherwise not the position the operator expected.
That distinction matters in the TD-H9 road test. Seeing 0 Off Duty on aprs.fi shows that the MIC-E status was decoded. It does not, by itself, show that the radio had acquired a fresh GNSS fix before sending the position.
MIC-E Type values shown by the TD-H9
| Value | Displayed Status | Plain-Language Use |
|---|---|---|
| 0 | Off Duty | General testing or no active assignment |
| 1 | En Route | Traveling toward an assignment or destination |
| 2 | In Service | Available or actively operating |
| 3 | Returning | Returning from an assignment or destination |
| 4 | Committed | Assigned and not presently available for another task |
| 5 | Special | A special activity defined by the operator or group |
| 6 | Priority | A priority situation defined by the operating group |
| 7 | Emergency | A genuine emergency requiring immediate attention |
Changing MIC-E Type does not increase transmitter power, improve GPS reception, move the packet ahead of other traffic, or guarantee that a digipeater will hear the beacon.
Do not select Priority or Emergency merely as a reception test. Use Emergency only for a genuine emergency and in accordance with the procedures of the group or network involved.
With radio firmware 1.0.32 and APRS firmware 1.0.15, the TD-H9 transmitted APRS packets that were received by the Graywolf station and forwarded through AA4TE-10.
The packet details displayed by aprs.fi included 0 Off Duty, matching MIC-E Type 0 on the radio. This verifies that the received packet’s MIC-E status field was decoded as expected.
During a later road trip, aprs.fi continued to show the TD-H9 at the previously reported home location even though the radio and operator were many miles away. The station eventually disappeared from the map after the radio was turned off.
That observation does not yet identify the cause. The map may have been showing the last packet received at home because no newer road packet reached an iGate. The radio may also have transmitted stored or fixed coordinates before obtaining a fresh GNSS fix. The packets and timestamps were not being watched while driving, so neither explanation has been confirmed.
Before deciding that MIC-E, GNSS, RF coverage, or aprs.fi is at fault, compare:
- the timestamp of the most recent packet;
- the latitude and longitude carried by that packet;
- the coordinates currently shown by the radio;
- the satellite count and GNSS-fix state;
- and whether a local receiver or iGate actually heard a new transmission.
An older icon at the correct former location usually means only that the map is displaying the last position it received.
- Park safely in an open area with a clear view of the sky. Do not work through menus or study aprs.fi while driving.
- Open Menu 7.38 — GNSS. Wait until the radio shows a usable satellite fix, then record the displayed latitude, longitude, satellite count, and time.
- Confirm Site Type = GPS Coord. Leave MIC-E Start = ON and MIC-E Type = 0 — Off Duty for the baseline test so the known settings remain unchanged.
- Allow one timed beacon or use a confirmed manual-beacon method. Record the transmission time.
- Check the packet received by Graywolf, another local APRS receiver, or the raw packet view on aprs.fi. Compare its timestamp and coordinates with the values recorded from the radio.
- Move to a second safe stopping place, wait for the radio’s coordinates to change and settle, then repeat the test.
- If both packets arrive with the correct new coordinates, MIC-E formatting and GNSS position reporting are working together for that test. If the new packet arrives with the old coordinates, investigate position source and fix handling. If no new packet arrives, investigate beacon triggering, RF path, channel assignment, and iGate coverage before blaming GPS.
For the first comparison, keep MIC-E enabled because the test platform has already produced a packet that aprs.fi decoded. If a specific decoder or receiving program appears unable to interpret the packet, repeat the same stationary test with MIC-E Start = OFF.
Changing MIC-E, beacon timing, paths, channel assignments, and GNSS settings at the same time may make a successful packet appear encouraging without revealing which setting actually changed the result.
For the format itself, see the APRS Protocol Reference and the APRS 1.1 Addendum.
For the radio’s menu names and current documentation, see the TIDRADIO manual page.
Why positions become stale
A position may remain visible after the reporting station has moved, shut down, lost GPS, lost Bluetooth, lost cellular service, closed its application, or stopped beaconing.
Internet services may retain the last received report so users can see that the station existed, even though no fresh information is arriving.
Why frequent reporting is not always better
Very short beacon intervals can consume battery power, cellular data, RF airtime, and shared network capacity.
A parked station generally does not need to report the same coordinates every few seconds. A moving emergency resource may justify more frequent updates, but the interval should match the operational need.
A command trailer, vehicle, volunteer, or weather station may no longer be at the displayed location.
For emergency operations, combine APRS with voice confirmation, incident documentation, check-in procedures, or another verified accountability method.
Use APRS as a useful situational-awareness tool rather than as the sole source of truth.
For EmComm use, define:
- the expected beacon interval;
- what constitutes a stale report;
- who monitors the display;
- how movement or arrival is confirmed;
- and what backup method is used if APRS fails.
While the trailer is moving, the tracker might report often enough for the EOC to follow its progress.
After arrival, the station could send a final position and status such as COUNTY CP OPERATIONAL, then reduce the beacon interval or stop automatic movement reports.
That provides useful information without continuously transmitting identical coordinates.
The TD-H9 manual documents one firmware update path through the ODmaster app/web portal. In practice, getting a firmware update to actually take required a different method — flashing directly from a PC via USB-C, entering the update mode with a key combo at power-on.
- PTT + 8 at power-on — did not connect reliably in testing.
- PTT + 3 (ON) at power-on, then connect USB-C — this is the one that worked. The update program's Update button was able to connect and complete the download on this attempt.
Step 1 — Power On Into Update Mode
- With the radio off, hold PTT and 3 (ON) together while powering on.
- The radio should present a firmware update / DFU-style interface rather than booting normally.
- Connect the USB-C cable to your PC after the radio is already in this mode.
Step 2 — Run the Update Program
- Open the TIDRadio firmware update utility on the PC.
- Click Update. If the radio was powered on with the PTT+8 combo instead, this step may fail to connect — power off, retry with PTT+3(ON).
- Wait for the download/flash to complete before disconnecting or power-cycling the radio.
The TD-H9 can be programmed three ways: directly from the radio keypad, with the free Windows Customer Programming Software, or through the ODmaster Bluetooth app.
Each method has a different strength. Manual programming builds the knowledge needed to make changes in the field. The CPS software is the fastest way to organize many channels and radio settings. ODmaster provides portable access through a phone or tablet without requiring a programming cable.
Programming software is convenient, but it should not become the only way an operator knows how to configure the radio.
- Field independence: A computer, phone, programming cable, or Bluetooth connection may not be available when a new frequency is needed. You may be better served by purchasing cables from an amazon store such as B-Tech in Arlington SD, USA; Sancon, Inc in Saratoga Springs, UT; or TNP Direct from W Covina CA
- Emergency operation: During a prolonged outage, computer battery power may need to be conserved for other communications and information needs.
- Troubleshooting: Understanding frequency, offset, tone, bandwidth, and memory settings makes software-created errors much easier to recognize.
- Using affiliate links for any purchase on this site does not affect your price. It helps to offset the costs associated with supplying this content on the hobby site. There may be cheaper items than I list since I search for US online stores to promote. If you choose inexpensive, the shipping time may be extended or the quality might not be to your standards. In any case, thank you to all who use one of the links to enter and make any purchase. We are grateful for your consideration.
Before Touching the Radio
Gather the complete repeater or simplex information first. A frequency by itself may not be enough to create a working memory channel.
- Receive frequency: The frequency transmitted by the repeater and heard by your radio.
- Offset direction: Positive, negative, or off.
- Offset amount: The difference between the receive and transmit frequencies.
- Access tone or code: CTCSS, commonly called PL, or a DCS code.
- Receive tone or code: Needed only when the repeater sends one and the operator wants receive filtering.
- Bandwidth: Wide or narrow.
- Transmit power: Low, medium, or high.
- Memory location and name: An unused channel number and a useful display label.
Step 1 — Select VFO or Frequency Mode
- Open the radio’s display or operating-mode controls.
- Select a mode that shows the actual frequency rather than only a stored channel number or channel name.
- Select the A or B display line that will be used while building the channel.
The radio’s frequency controls are found under Radio Setting. The menus closely resemble the controls shown later in ODmaster.
Step 2 — Enter the Repeater Output Frequency
Enter the frequency published as the repeater’s main frequency. This is normally the repeater output—the frequency your radio receives.
For simplex operation, the receive and transmit frequencies are the same, so no repeater offset is needed.
The frequency commonly shown as the repeater frequency is usually the frequency transmitted by the repeater.
Your radio receives on that frequency and transmits on the repeater input, which is calculated from the offset amount and direction.
Step 3 — Enter the Offset Amount
The offset is the difference between the receive frequency and transmit frequency.
- Common U.S. VHF offset: enter 00.600 for 0.600 MHz.
- Common U.S. UHF offset: enter 05.000 for 5.000 MHz.
The field may initially display 00.000. When changing it, enter the entire value, including the leading zero.
Many amateur radios automatically apply the usual repeater offset when a frequency is entered within a common repeater portion of a band.
The tested TD-H9 running firmware 1.0.32 did not appear to insert the usual VHF or UHF offset automatically. Enter and verify the offset before saving the channel.
Step 4 — Select the Offset Direction with Set-D
The offset amount and offset direction are separate settings.
- + means the radio transmits above the receive frequency.
- − means the radio transmits below the receive frequency.
- Off means transmit and receive use the same frequency.
Entering 05.000 does not tell the radio whether to add or subtract 5 MHz. Use Set-D to select the correct direction.
Common U.S. Repeater Offsets — Quick Reference
These are common U.S. repeater conventions, not universal rules. Verify the actual repeater listing whenever possible.
| Band | Repeater Output Range | Offset Entry | Set-D | Transmit Direction |
|---|---|---|---|---|
| 2 meters | 145.110–145.490 MHz | 00.600 | − | Transmit 0.600 MHz below receive |
| 2 meters | 146.610–146.970 MHz | 00.600 | − | Transmit 0.600 MHz below receive |
| 2 meters | 147.000–147.390 MHz | 00.600 | + | Transmit 0.600 MHz above receive |
| 70 centimeters | 440.000–444.975 MHz | 05.000 | + | Transmit 5.000 MHz above receive |
| 70 centimeters | 445.000–449.975 MHz | 05.000 | − | Transmit 5.000 MHz below receive |
Some repeater listings provide a frequency and tone but omit the plus or minus sign. The table above can help identify the usual direction, but individual repeaters may use nonstandard splits or locally coordinated exceptions.
If the repeater’s input frequency is published, use that information to verify the offset instead of relying only on a general chart.
Step 5 — Enter the Access Tone or Code
Repeater directories may use the terms CTCSS, PL, or tone for the same type of continuous analog access tone.
PL is Motorola’s trade name for CTCSS. In ordinary repeater listings, the terms are often used interchangeably.
- TX Encode: The tone or code transmitted by your radio to open the repeater.
- RX Decode: The tone or code your radio requires before opening its own speaker.
Most repeater listings provide the access tone your radio must transmit. Enter that value under TX Encode or TX CTCSS/DCS.
Many repeaters listen for a CTCSS or DCS access signal but do not transmit the same tone on their output.
If a receive tone is entered when the repeater does not send it, the radio may receive the repeater’s RF signal but keep the speaker muted. For a first test, leave RX Decode off unless the listing clearly provides an output tone or code.
DCS Codes Ending in N or I
The TD-H9 lists each DCS code in two forms:
- N means normal DCS polarity.
- I means inverted DCS polarity.
A repeater directory may list only a code such as D315 without showing N or I. Unless the repeater documentation specifically states that inverted polarity is required, select the normal entry: D315N.
A listing showing: 443.650 MHz, +5 MHz, D315 / D315 can be programmed as:
- Receive frequency: 443.650 MHz
- Offset: 05.000 MHz
- Set-D: +
- Transmit frequency: 448.650 MHz
- TX Encode: D315N
- RX Decode: D315N
The two D315 entries indicate that the code is used in both directions. Because inverted polarity is not specified, normal polarity is the appropriate starting choice.
Step 6 — Select Power and Bandwidth
- Choose Low, Medium, or High transmit power.
- Use the lowest power that provides reliable communication.
- Choose Wide or Narrow bandwidth to match the repeater or channel plan.
Higher transmit power does not always correct poor communication. Antenna placement, terrain, buildings, interference, and station height may matter more.
Step 7 — Save the Completed Channel
- Open the memory-save or channel-save function.
- Select an unused memory location.
- Confirm the save operation.
- Switch to Channel Mode.
- Open the newly saved memory and verify its settings.
The guide will add the exact TD-H9 button sequence after the complete save-to-memory procedure has been performed and verified directly on the radio.
Instructions from another handheld will not be substituted merely because the keypads look similar.
Entering a Channel Name or Other Text
- Use short, repeated keypad presses to cycle through the letters or characters assigned to a key.
- Use the lower-right keypad button to switch between letters and numbers.
- Press the Up key to move the cursor left.
- Press the Down key to move the cursor right.
- Use the delete or back control to remove an incorrect character.
- Press # to confirm and save when the entry is complete.
Some fields are longer than the visible portion of the screen. Move the cursor left and right to review the beginning and end of the stored value.
The display may show only the middle portion of a longer entry.
- WIDE1 may appear as IDE1.
- WIDE2 may appear as IDE2.
- 123456 may appear as 2345.
The missing characters may still be stored. Move the cursor through the field before assuming the value is incorrect.
Step 8 — Test the Saved Channel
- Confirm that the radio receives normally on the saved channel.
- Check the display for the expected power, bandwidth, tone, and offset symbols.
- When authorized and appropriate, make a short test transmission.
- Confirm that the radio returns to the correct receive frequency after transmitting.
- If the channel does not work, compare each stored setting with the original repeater information one item at a time.
Build and test one known local repeater or simplex channel first. Once it works correctly, use the same process for the remainder of the channel list.
Opening the Software
The downloaded ZIP file contains the programming application. After extracting the files, the application appears to run from the extracted folder rather than through a conventional installer.
At startup, the software asks which radio and operating profile will be programmed:
- TD-H9 Ham
- TD-H9 GMRS
- TD-H9 Normal
- TD-H3 Ham
- TD-H3 GMRS
- TD-H3 Normal
Select the profile that matches the radio’s current mode. The tested radio was configured in Ham Only mode.
Recommended CPS Workflow
- Connect the radio and select the correct COM port.
- Choose Program → Read from Radio.
- Save the untouched configuration as an original backup.
- Use Save As to create a separate working file.
- Disconnect the radio if desired.
- Edit and save the working file offline.
- Reconnect the radio when the configuration is ready.
- Choose Program → Write to Radio.
- Read from the radio again and verify that the changes were accepted.
Save stores the configuration as a file on the computer. It does not change the radio.
Write to Radio transfers the open configuration into the radio. It does not replace the value of keeping a reusable backup file.
Use both.
Main Channel Database
The main database presents channel information in a spreadsheet-style layout. Observed headings include:
- RX Frequency
- TX Frequency
- RX CTCSS/DCS
- TX CTCSS/DCS
- Power
- Bandwidth
- Scrambler
- PTT ID
- Frequency Hop
- Busy Lock
- Scan
- RX Model
- Channel Name or Label
This view is especially useful when comparing many channels or entering a large group of local repeaters.
Show the spreadsheet-style channel database with the rows and columns visible.
Suggested caption:
TIDRADIOCPS main channel database. The table places receive and transmit frequencies, tones, power, bandwidth, scan options, and channel names in one view.
Optional Settings
The Optional Settings window groups many radio controls into drop-down menus and checkboxes.
Observed groups include:
- Key Configuration
- ANI Settings
- A/B Settings
- Display options
- Transmit controls
- Scan timing
- Power-save and dual-watch settings
- Expanded transmit-range controls
This page is one of the clearest demonstrations of how much configuration the free software exposes.
Suggested caption:
TIDRADIOCPS Optional Settings window. Programmable keys, display modes, LED flash timing, scan hang time, and radio operating options are organized into practical drop-down menus and checkboxes.
Observed Programmable-Key Defaults
| Key Action | Observed Default |
|---|---|
| Top Key Short | None |
| Top Key Long | Alarm |
| Side Key 1 Short | GNSS |
| Side Key 1 Long | Cancel Squelch |
| Side Key 2 Short | FM Radio |
| Side Key 2 Long | Weather |
Short-press and long-press lists are not identical. Some short-press lists include GNSS, PTT2, and OD PTT, while the long-press lists do not.
The software displays Breadth Led, while the radio and manual use Breath Led.
The guide uses the clearer phrase Standby LED Flash Interval while preserving the exact software and radio labels in observations.
Other differences include:
- Word Mode A/B, which appears to mean display mode;
- Mid in one location and Middle in another;
- Scramble and Scrambler;
- Channel Band for bandwidth;
- and several related names for the CPS application itself.
A/B Channel Settings
Channel A and Channel B offer the same controls in the same order:
- Frequency
- Offset
- Offset Direction
- RX CTCSS/DCS
- TX CTCSS/DCS
- TX Power
- Bandwidth
- Busy Lock
- Frequency Hop
- Scrambler
- PTT ID
- FM or AM Mode
The pull-down lists reduce the chance of typing an invalid tone, DCS code, power level, or bandwidth value.
CTCSS, PL, Encode, and Decode
Repeater directories may call the same analog access tone CTCSS, PL, or simply Tone.
In the CPS:
- TX CTCSS/DCS is the tone or code transmitted into the repeater.
- RX CTCSS/DCS is the tone or code required before the radio opens its speaker.
For most repeaters, enter the published access tone under TX CTCSS/DCS and leave RX CTCSS/DCS set to Off for the initial test.
If RX CTCSS/DCS is programmed but the repeater does not transmit the same tone or code, the radio may receive the signal while keeping the speaker muted.
Entering the same tone in both fields is appropriate only when the repeater listing clearly provides both an input and output tone or code.
Individual Channel Editor
Opening CH-1 displays a record indicator such as 1/199, navigation buttons, and a two-column Channel Settings window.
Observed fields include:
- RX Frequency
- TX Frequency
- RX CTCSS/DCS
- TX CTCSS/DCS
- Scrambler
- TX Power
- Frequency Hop
- Add to Scan
- Busy Lock
- PTT ID
- Channel Band
- FM or AM Mode
- Channel Name
The Channel tree displayed CH-1 through CH-30, then skipped to CH-189 through CH-199.
The individual editor still showed 1/199 and provided next and last-record controls. This strongly suggests that all 199 memory positions exist even though the tree view does not visibly list every channel folder.
The missing middle channels may simply be unused memories that are not being displayed in the tree.
Preloaded and Empty Memories
The tested radio arrived with several example or preprogrammed memories. Channels 189 through 199 contained NOAA or National Weather Service weather channels.
The absence of visible tree folders for some middle channel numbers may indicate that those memory locations are still empty.
FM Radio Settings
The FM broadcast-radio page includes:
- VFO or Channel work mode;
- current channel selection;
- a Channel Enable checkbox;
- 25 FM broadcast memory rows;
- and a VFO row, observed with 88.9 MHz entered.
VFO mode uses a directly entered broadcast frequency. Channel mode uses one of the stored FM broadcast memories.
DTMF Settings
Observed controls include:
- Local ID
- Group Code
- Reset Time
- Auto Answer
- DCD
- DTMF Speed
- Scan Range
- Stun Code
- Kill Code
- Begin Code
- End Code
- Remote Kill
- Remote Stun
- and eight 16-digit Status List entries
The observed Local ID was 123. All eight Status List rows were filled with sixteen zeros:
0000000000000000Leave remote-control functions disabled unless their behavior, control codes, and operational purpose are fully understood.
DTMF command sequences should not be treated as secure authentication.
Programming Cables and USB Drivers
A Kenwood-style two-pin connector describes the plug arrangement, not the USB chipset inside the cable.
Common cable chipsets include:
- CH340 or CH341
- Prolific PL2303 family
Install the driver appropriate to the actual chipset reported by Windows Device Manager.
The tested generic Kenwood-style cable did not use a CH340 chipset. Windows identified it as a Prolific PL2303TA.
Windows 11 loaded a newer Prolific driver and displayed a message stating that the PL2303TA was unsupported.
PL2303TA Windows 11 Workaround
- Download and install a compatible legacy Prolific driver package.
- The tested working version was 3.2.0.0.
- Plug in the cable so its Device Manager entry becomes visible.
- Right-click the Prolific USB serial device.
- Choose Update driver.
- Choose Browse my computer for drivers.
- Choose Let me pick from a list of available drivers on my computer.
- Select Prolific version 3.2.0.0 manually.
- Confirm that the unsupported-device warning disappears.
- Note the COM-port number and select that port in TIDRADIOCPS.
If the cable is removed, its Device Manager entry may disappear. Plug it back in before attempting to select or change its driver.
Temporarily Reduce Automatic Driver Replacement
Windows may immediately choose the newer driver even after the legacy driver is installed.
One temporary method is:
Control Panel
→ System
→ Advanced system settings
→ Hardware
→ Device Installation Settings
→ NoWindows presents a misleading screen in this process. The large check-mark graphic is only an image. Use the actual Device Installation Settings button near the lower-right corner of the window.
After the working cable driver has been selected and the radio has been programmed, restore the Windows driver-installation setting that was changed.
Leaving automatic driver updates disabled may affect unrelated hardware.
During testing, clicking A/B Channel, FM Radio, DTMF Code, or individual channel folders sometimes produced an exception window.
After restarting the application, previously unavailable pages opened normally. This suggests that some errors may be related to the software session rather than permanently damaged files.
Read from the radio and save an original file before experimenting with large edits. If the application behaves unexpectedly, close it, reopen the saved file, and continue from a known configuration.
Bluetooth Connection Is Only the First Step
Connecting the radio through Bluetooth LE does not automatically transfer all radio settings into the app.
- Turn on the radio and Bluetooth function.
- Open ODmaster and connect to the TD-H9.
- Open the Program section.
- Tap READ.
- Wait for the radio configuration to appear in the app.
The first four channels had already been programmed into the radio. Channels 189 through 199 contained preloaded weather channels.
After the Bluetooth LE connection was made and READ was tapped in ODmaster, those existing radio memories appeared in the app.
This indicates that ODmaster reads the configuration stored in the radio. It does not require the user to enter the same channels again merely because a different programming method was used.
Encode and Decode Labels
ODmaster uses wording that may be clearer for beginners:
- Encode (TX) is the tone or code sent by the radio.
- Decode (RX) is the tone or code required before the radio opens its speaker.
For a repeater listing that gives only one PL or CTCSS tone, enter it under Encode (TX) and normally leave Decode (RX) off for the first test.
Most repeaters listen for a tone or code on their input. Not all repeaters send the same tone or code on their output.
If both directions are listed—such as D315 / D315—enter the corresponding normal or inverted DCS selection in both Encode and Decode.
The App Closely Resembles the Radio Menus
Many ODmaster controls closely follow the names and organization used under Radio Setting on the TD-H9.
This makes the app easier to understand after learning the radio manually, and it makes the radio easier to navigate after using the app.
Settings previously written to the radio through the Windows CPS were available to ODmaster after the app connected by Bluetooth LE and the operator tapped READ.
The important distinction is that the transfer was not automatic merely because Bluetooth connected. The READ command initiated the retrieval.
ODmaster can read the radio’s channel memories and exposes many radio settings through app controls.
The complete process for creating a new amateur repeater memory directly inside ODmaster should be documented only after it has been performed and verified from beginning to end.
Until then, the guide will distinguish between settings that have been read successfully and settings that have been manually created in the app.
Recommended ODmaster Workflow
- Connect the radio through Bluetooth LE.
- Open the Program section.
- Tap READ before changing anything.
- Review the current channels and radio settings.
- Make one controlled change.
- Write or synchronize the change according to the app’s command.
- Read the radio again and verify the stored result.
Before editing an entire channel list, change one harmless setting or create one test channel. Read the radio again and confirm that the change was stored correctly.
| Method | Best Use | Primary Advantage |
|---|---|---|
| Manual Keypad | Field changes and emergency operation | Works without a computer, phone, cable, or internet connection |
| TIDRADIOCPS | Large channel lists, backups, and detailed configuration | Fast spreadsheet-style editing with drop-down menus and checkboxes |
| ODmaster | Portable Bluetooth programming and configuration review | Reads the radio through Bluetooth LE without a programming cable |
Learn to create one working channel manually. Then use TIDRADIOCPS to build and save the full channel plan. Use ODmaster for portable review and Bluetooth-based changes.
The three methods complement one another. None has to replace the others.
The TD-H9 pairs to a phone over Bluetooth BLE to work with the ODmaster app for PTT, calling, and audio streaming, independent of standard analog RF. CHIRP does not support this radio as of June 2026 — programming/config beyond the radio's own menu goes through ODmaster (app or web.odmaster.net).
Step 1 — Turn on Bluetooth on the Radio
Menu → Bluetooth → BT ON/OFF, or short-press the BT side key. A white Bluetooth icon means on but not connected; blue means connected.
Step 2 — Connect the Phone
On the phone, turn on Bluetooth and select the radio — name shows as TD-H9xxxx (check the exact name at Menu → Bluetooth → BT Name). Do not pair to a suffix ending in (BLE).
Step 3 — Confirm BT Mode
Menu → Bluetooth → BT Mode → Receiver. (Emitter mode is for Bluetooth accessories like a PTT mic or headset pairing to the radio — not what you want for phone/ODmaster use.)
Step 4 — OD PTT Function (Radio ⇄ ODmaster Talk)
Once connected, side key PF1 automatically becomes the OD PTT key (it resumes its prior function when Bluetooth disconnects).
- Menu → Bluetooth → OD PTT → set to OD (transmit only to ODmaster) or OD+Analog (transmit to ODmaster and machines on the same frequency).
- Open the ODmaster app and enter a group/channel.
- Press the PF1 (OD PTT) key to talk — the app's mic indicator shows it's transmitting.
Calling & Audio Functions (Phone as Handset/Speaker)
With Bluetooth connected in Receiver mode, the radio can also act as a Bluetooth phone accessory, independent of ODmaster's PTT group function:
Calling: key 1 answers an incoming call; long-press key 4
redials; key 3 or PTT hangs up.
Audio playback: the radio acts as a Bluetooth speaker for the
phone's music player — key 1 previous track, key 3 next track, key 2 short/long press to
play/pause.
ODmaster App & Web Portal
- App: search "Odmaster" on Google Play / iOS App Store.
- Web programming portal: web.odmaster.net — parameters set here sync to the phone and can be written directly to the radio; generally faster than the phone UI for bulk changes.
- Registration: it's recommended to register by email rather than phone, per the app's own onboarding screens.
Step 1 — Set the APRS Frequency
Tune your active channel (VFO mode or a programmed channel) to 144.390 MHz — the North American APRS standard. This is what the radio uses to both listen and transmit position packets.
Step 2 — Enter the APRS Menu
Press MENU, navigate to item 7.40 — APRS.
Step 3 — Configure the Digipeater Path
Set the path to WIDE1-1,WIDE2-1 — standard practice for mobile stations, relayed by nearby digipeaters without overloading the network. Avoid wider paths like WIDE3-3 when mobile.
Step 4 — Enable Timed Beacon (key step for mobile tracking)
In the APRS menu, find Timed Beacon and set it On, then set the Timing interval.
Moving (highway): ~2 minute intervals is a solid starting point.
Moving (in-town/slower): 1 minute for better track resolution.
Stationary: increase the interval to save battery and reduce channel congestion.
Optionally enable PTT Linkage to send a beacon each time PTT is pressed/released — handy during nets, not required for pure tracking.
Step 5 — Set TX and RX Channels
In APRS → Advanced Set (Menu No.5):
- APRS RX CH: CH-A or CH-B, whichever channel has 144.390 tuned
- APRS TX CH: same channel
Keep voice on the other channel if you want to monitor both simultaneously.
Step 6 — Confirm GPS Lock
Menu → 7.38 GNSS to check satellite count and coordinates. Wait for a solid fix — 3+ satellites minimum, 6+ ideal — before relying on beacons, or you'll transmit a null/stale position.
Step 7 — Enable APRS
Back in the main APRS settings, confirm the APRS function itself is On. With the timed beacon running and a GPS fix acquired, the radio transmits position automatically at the set interval.
Step 8 — Verify on aprs.fi
Pull up aprs.fi on your phone and search your callsign-SSID (e.g. AA4TE-7). Once the first beacon hits a digipeater or IGate, you should appear on the map within a minute or two.
- Keep the antenna vertical with a clear view of the sky — beacons need to reach a digipeater, so RF path matters as much as GPS.
- -7 is the conventional SSID for handheld/portable mobile stations.
- Not appearing on aprs.fi? Re-check 144.390 is set and that you're in range of a digipeater (zoom in on your route at aprs.fi to check coverage).
- APRS beaconing is reliable in suburban/rural terrain, spotty in dense urban canyons — occasional dropped packets are normal.
Known candidates likely to need re-checking after any update, based on this radio's behavior and patterns seen on other TIDRadio/CHIRP-adjacent gear:
- APRS ON/OFF state (Menu 7.40.1)
- APRS RX CH / TX CH assignment (Advanced Set, Menu 7.40.5)
- Timed Beacon On/Off and Timing interval (Menu 7.40.3)
- Digipeater path / SSID / Beacon Set fields (Menu 7.40.2)
- GNSS On/Off (Menu 7.38.1)
- Bluetooth BT Mode (Receiver vs. Emitter) and OD PTT setting
- PF1/PF2 side key custom assignments, if OD PTT or another function was mapped there
Try this instead:
TD-H3 Plus and H9 Programming Software Version 26.01.23
Role reminder: the TD-H9 is a backup/mobile unit for gathering APRS messages while away from the laptop/IC-7100 go-box setup — not a replacement for it.
Testing Log
2026-07-11
- Verified beaconing on firmware 1.0.32 / APRS 1.0.15.
- Confirmed packets received by Graywolf and forwarded through AA4TE-10.
- Continuing investigation of PTT Linkage behavior.
Start with the simplest causes
Most handheld-radio problems are caused by power, battery contact, volume, antenna installation, channel programming, signaling settings, or the operating environment.
Work through the likely causes one at a time. Avoid changing several settings at once, because that makes it difficult to determine which change corrected the problem.
What to try
- Remove the battery and reinstall it firmly.
- Recharge the battery or try a known-good battery.
- Inspect the radio and battery contacts for dirt, corrosion, or damage.
- Clean dirty contacts carefully with the radio powered off.
A battery may appear attached while one edge is not fully seated. Remove it completely and reinstall it rather than simply pressing on it.
What to try
- Recharge or replace the battery.
- Increase the volume gradually.
- Turn the radio off, remove the antenna, and reinstall it securely.
- Inspect and clean the speaker opening without forcing objects into it.
- Move to a more open location and test again.
What to verify
- Compare the actual receive frequency on both radios.
- Compare the actual transmit frequency on both radios.
- Verify CTCSS or DCS settings.
- For repeater use, verify offset direction, offset amount, and access tone.
- Move closer together and test on a known simplex frequency when lawful.
Program both radios temporarily with the same simplex frequency and no receive tone. If they communicate at short range, the problem is likely in the repeater or signaling configuration rather than the radios themselves.
What to try
- Listen long enough to determine whether the activity is another legitimate user.
- Move to a different authorized frequency or channel when appropriate.
- Adjust the squelch only enough to suppress background noise.
- Verify whether the group uses a CTCSS or DCS receive setting.
A receive tone can hide other users from the speaker, but their transmissions still occupy the frequency and can interfere with yours. Always listen before transmitting when possible.
What to try
- Move toward the other station.
- Move outdoors or to a higher, more open location.
- Keep the antenna vertical and away from the body when practical.
- Move away from computers, chargers, LED lighting, power supplies, and other electronics.
- Restart the radio and test again.
Parking garages, basements, metal buildings, elevators, and dense urban areas can produce severe signal loss or reflections. A radio that works poorly indoors may operate normally after moving outside.
What to try
- Release and inspect the radio’s PTT button.
- Turn VOX OFF.
- Disconnect the headset or external microphone.
- Inspect the accessory plug and jack.
- Power-cycle the radio.
If the radio continues transmitting, turn it off. A stuck transmitter can interfere with other users and rapidly discharge the battery.
Record the radio model, firmware version, battery condition, frequency, channel settings, signaling settings, and the steps already attempted. Then contact the dealer or manufacturer for technical support.
A clear description such as “receives normally but does not transmit on Channel B” is more useful than “the radio does not work.”
Why this section is included
The TD-H9 can receive, display, and—in some configurations—accept transmit frequencies across several VHF and UHF ranges. That technical capability does NOT determine where an amateur operator may legally transmit or how amateurs normally share a band.
This section compares practical handheld-oriented portions of the United States and United Kingdom band plans. It is intended to help operators recognize both the similarities and the important differences between the two countries.
Amateur radio is an international service, but frequency allocations, licence privileges, repeater arrangements, channel spacing, power limits, and customary operating practices vary from country to country.
A frequency commonly used by amateur operators in one country may be assigned to another service—or unavailable to amateurs entirely—in another.
Always follow the regulations, licence conditions, and band plan that apply at the physical location from which you are transmitting.
The tables below summarize portions of the bands most relevant to handheld FM, digital voice, repeaters, simplex operation, satellites, and general operating awareness.
They do not reproduce every frequency segment, permitted mode, bandwidth recommendation, footnote, regional exception, or special licence condition.
For complete and current information, consult the official resources linked within each country section.
Allocation, privileges, and band plans are different
A frequency allocation establishes the spectrum made available to the Amateur Service by a national regulator.
Licence privileges determine which frequencies, modes, power levels, and operating conditions are available to a particular operator.
A band plan divides an amateur allocation into recommended areas for activities such as weak-signal work, FM simplex, repeaters, satellites, digital communication, beacons, and experimentation.
Band plans help operators avoid interfering with activities that may be difficult or impossible to conduct on the same frequency at the same time.
A frequency may sound unused while being reserved by the band plan for weak-signal work, satellite operation, repeater inputs, propagation beacons, digital systems, or intermittent emergency communication.
Listen before transmitting, consult the current band plan, and check local repeater or frequency-coordination information.
A calling frequency is generally used to establish contact. When practical, operators then move to another suitable frequency so the calling channel remains available to others.
Calling frequencies are not private channels, exclusive reservations, or guarantees that every transmission there is appropriate.
🇺🇸 US overview
For the bands most closely associated with the TD-H9, United States amateurs commonly work within:
- 2 meters: 144–148 MHz
- 1.25 meters: 222–225 MHz for ordinary amateur voice and data operation
- 70 centimeters: 420–450 MHz
The separate 219–220 MHz allocation is limited to specified fixed digital message-forwarding operations and should not be treated as ordinary handheld voice spectrum.
For the detailed voluntary operating plan, visit: ARRL Band Plan .
For legal allocation boundaries and licence-class privileges, visit: ARRL Frequency Allocations .
The United States provides considerably more spectrum on 2 meters and 70 centimeters than the United Kingdom and also includes the 222–225 MHz 1.25-meter allocation.
That additional spectrum does not make every frequency interchangeable. Weak-signal, satellite, repeater, simplex, control, and experimental activities still depend on operators following the band plan and local coordination practices.
Practical operating overview
| Frequency Range | Common United States Use |
|---|---|
| 144.000–144.300 MHz | CW, SSB, Earth-Moon-Earth, weak-signal work, and propagation beacons |
| 144.300–144.600 MHz | Satellite, translator, and related specialized operation including the 144.390 MHz Automatic Packet Reporting System (APRS) frequency |
| 144.600–145.500 MHz | Repeater inputs and outputs, packet, simplex, and locally coordinated uses |
| 145.800–146.000 MHz | Amateur satellite operation |
| 146.010–146.370 MHz | Common repeater inputs |
| 146.400–146.580 MHz | FM simplex, including the 146.520 MHz national calling frequency |
| 146.610–147.390 MHz | Common repeater outputs |
| 147.420–147.570 MHz | FM simplex |
| 147.600–147.990 MHz | Common repeater inputs |
For initial simplex testing, begin with a locally accepted simplex frequency or the national calling frequency, listen carefully, identify with your call sign, and move elsewhere if a longer conversation develops.
For repeater use, program the published output frequency, offset direction, offset amount, and access tone supplied by the repeater owner or local coordinator.
The national band plan provides broad guidance, but local coordinators may use different repeater pairs or designate certain frequencies for regional needs.
Do not calculate or guess a repeater input solely from a remembered offset. Verify the repeater’s published information.
Practical operating overview
| Frequency Range | Common United States Use |
|---|---|
| 222.000–222.150 MHz | Weak-signal modes, CW, SSB, Earth-Moon-Earth, and propagation beacons |
| 222.150–222.250 MHz | Local coordinator options, weak signal, repeater inputs, and control |
| 222.250–223.380 MHz | FM repeater inputs |
| 223.400–223.520 MHz | FM simplex |
| 223.520–223.700 MHz | Digital, packet, links, and control |
| 223.710–223.850 MHz | Local coordinator options, including simplex, packet, and repeater outputs |
| 223.850–224.980 MHz | FM repeater outputs |
Leave the radio’s expanded 200 MHz capability disabled unless you intend to use the United States 222–225 MHz amateur allocation and have confirmed that the radio and antenna perform appropriately there.
Program known local repeaters or agreed simplex frequencies rather than exploring the broader unlocked range by transmitting.
The TD-H9’s 200TX label does not mean that the entire 200 MHz region is amateur spectrum.
Ordinary United States amateur voice and data operation in this area is confined to 222–225 MHz. Frequencies outside that allocation may belong to government, commercial, maritime, land-mobile, or other services.
The 1.25-meter allocation is strongly associated with the United States and portions of ITU Region 2. It is not a standard worldwide amateur allocation.
A United Kingdom operator should not assume that a radio capable of 222–225 MHz may be used there for amateur transmission.
Practical operating overview
| Frequency Range | Common United States Use |
|---|---|
| 420.000–432.000 MHz | Amateur television, control links, experimental operation, and locally planned activities |
| 432.000–433.000 MHz | Earth-Moon-Earth, CW, SSB, weak-signal work, and propagation beacons |
| 433.000–435.000 MHz | Auxiliary and repeater links |
| 435.000–438.000 MHz | International amateur satellite operation |
| 438.000–442.000 MHz | Amateur television, repeater links, and locally coordinated uses |
| 442.000–445.000 MHz | Repeater inputs and outputs, depending on local coordination |
| 445.000–447.000 MHz | Simplex, repeaters, auxiliary links, and control; includes 446.000 MHz national simplex calling |
| 447.000–450.000 MHz | Repeater inputs and outputs, depending on local coordination |
Use locally published repeater information and regional simplex guidance. Although a 5 MHz repeater offset is common, the input direction and exact frequency pair must still be verified.
Avoid transmitting in satellite, weak-signal, beacon, or link portions of the band merely because the frequency sounds quiet on an FM handheld.
United States amateur operation on 70 centimeters is secondary to certain federal radiolocation systems and is subject to sharing requirements.
Special restrictions can apply in portions of the band near Canada and near specified government facilities. In particular, operation below 430 MHz should never be assumed permissible everywhere in the country.
Consult current FCC rules and local coordination information before using unfamiliar portions of 420–450 MHz.
🇬🇧 UK overview
For the bands most closely associated with this radio, United Kingdom amateurs commonly work within:
- 2 metres: 144–146 MHz
- 70 centimetres: 430–440 MHz
The United Kingdom does not have an ordinary amateur allocation corresponding to the United States 222–225 MHz 1.25-metre band.
United Kingdom band planning is based substantially on the IARU Region 1 plan, with national modifications and licence conditions administered by Ofcom.
For the current detailed VHF and UHF plans, visit: RSGB VHF and UHF Band Plans .
For United Kingdom amateur-radio licence guidance, visit: Ofcom Information for Amateur Radio Licensees .
The UK 2-metre and 70-centimetre allocations are narrower than their United States counterparts and use different channel spacing, calling frequencies, repeater systems, and licence conditions.
The absence of a UK 1.25-metre allocation is especially relevant to radios with expanded 200 MHz capability.
Practical operating overview
| Frequency Range | Common United Kingdom Use |
|---|---|
| 144.000–144.150 MHz | All modes, CW, narrow machine-generated modes, Earth-Moon-Earth, and satellite downlinks near the lower band edge |
| 144.150–144.400 MHz | CW, SSB, machine-generated modes, and long-distance weak-signal operation |
| 144.400–144.500 MHz | Propagation beacons; ordinary FM transmission should be avoided |
| 144.500–144.794 MHz | All modes, including telephony, images, and other compatible activities |
| 144.794–144.990 MHz | Machine-generated modes and digital communication, including APRS, gateways, and packet systems |
| 144.990–145.194 MHz | Coordinated FM and digital-voice repeater inputs |
| 145.200–145.594 MHz | FM and digital-voice simplex channels, including the 145.500 MHz FM calling channel and some EchoLink gateways |
| 145.594–145.794 MHz | Coordinated FM and digital-voice repeater outputs |
| 145.806–146.000 MHz | Amateur Satellite Service |
Program United Kingdom channels using the current RSGB plan and the published details of the intended repeater or gateway.
Do not transfer a United States memory-channel list directly into a radio intended for UK transmission. Frequencies above 146 MHz that are normal amateur channels in the United States are outside the ordinary UK 2-metre allocation.
United States amateurs have access to 144–148 MHz, but the ordinary United Kingdom 2-metre allocation is 144–146 MHz.
Common United States repeater and simplex channels between 146 and 148 MHz must not be treated as UK amateur channels.
The principal UK 2-metre voice repeater system places outputs approximately 600 kHz above the corresponding inputs.
That arrangement should still be programmed from verified repeater information rather than inferred from frequency alone.
Why this difference matters
The United States allocation at 222–225 MHz is not an ordinary United Kingdom amateur allocation.
A TD-H9 imported into the United Kingdom may still display or accept frequencies in that region, but radio capability does not create amateur operating privileges.
United Kingdom operators should not program United States 222–225 MHz simplex or repeater channels for amateur transmission within the UK.
The same spectrum may be assigned to entirely different services under the United Kingdom frequency-allocation system.
This is one of the clearest examples of why a frequency list cannot safely travel across national borders without being checked.
The equipment may be identical. The legal spectrum available to the operator is not.
Practical operating overview
| Frequency Range | Common United Kingdom Use |
|---|---|
| 430.000–432.000 MHz | All modes, Internet voice gateways, data links, digital repeaters, and coordinated repeater outputs |
| 432.000–432.100 MHz | CW and narrow machine-generated modes, including Earth-Moon-Earth activity |
| 432.100–432.400 MHz | CW, SSB, machine-generated modes, and terrestrial weak-signal operation |
| 432.400–432.500 MHz | Propagation beacons; ordinary FM transmission should be avoided |
| 432.500–432.994 MHz | All modes and non-channelised operation |
| 432.994–433.381 MHz | Coordinated FM and digital-voice repeater outputs |
| 433.394–433.600 MHz | FM and digital-voice simplex channels, including 433.500 MHz FM calling |
| 433.600–434.600 MHz | All modes, gateways, digital links, emergency communication, and experimentation |
| 434.594–434.981 MHz | Coordinated FM and digital-voice repeater inputs |
| 435.000–438.000 MHz | Amateur Satellite Service and digital television |
| 438.000–440.000 MHz | All modes, coordinated repeater inputs, digital voice, hotspots, and other planned uses |
Use the current RSGB plan and verified repeater data when programming UK 70-centimetre channels.
Do not assume that the common United States 5 MHz repeater relationship applies to UK systems. UK repeater channels use nationally coordinated arrangements that differ from both United States practice and some nearby European systems.
The United Kingdom 430–440 MHz amateur allocation is secondary and includes additional restrictions in parts of the band.
RSGB guidance identifies power restrictions within 430–432 MHz and a geographic restriction affecting 431–432 MHz within a specified radius of central London.
Operators must consult their current Ofcom licence and RSGB guidance before using these portions of the band.
The United States 70-centimetre allocation extends from 420 to 450 MHz. The ordinary United Kingdom allocation is only 430 to 440 MHz.
United States channels below 430 MHz or above 440 MHz must not be programmed for amateur transmission in the UK merely because the radio accepts them.
Compare the allocations
| Band | United States | United Kingdom |
|---|---|---|
| 2 meters / 2 metres | 144–148 MHz | 144–146 MHz |
| 1.25 meters / 1.25 metres | 222–225 MHz for ordinary amateur operation | No corresponding ordinary amateur allocation |
| 70 centimeters / 70 centimetres | 420–450 MHz | 430–440 MHz |
| 2 m FM calling | 146.520 MHz | 145.500 MHz |
| 70 cm FM calling | 446.000 MHz | 433.500 MHz |
| Typical 2 m repeater relationship | 600 kHz; direction varies with the frequency pair | 600 kHz; principal outputs are above inputs |
| Typical 70 cm repeater relationship | 5 MHz is common, subject to local coordination | Several coordinated systems, including 1.6 MHz and 7.6 MHz arrangements |
United States and United Kingdom amateurs share the same broad goals: experimentation, communication, technical learning, public service, and avoidance of harmful interference.
They do not always pursue those goals with the same frequency limits, repeater offsets, channel spacing, licence conditions, or operating customs.
Comparing the two plans is a useful reminder that good amateur practice begins with knowing the rules and conventions where the transmitting station is physically located.
EchoLink and similar systems allow amateurs in different countries to communicate through linked radios and repeaters.
The Internet portion of the path does not make one country’s RF channels available in another. Each radio-frequency transmission remains subject to the rules, licence conditions, and band plan at the location where that transmission occurs.
When sharing programming files, memory lists, or frequency charts internationally:
- Identify the country for which the file was created.
- Remove channels outside the receiving operator’s local amateur allocations.
- Verify repeater offsets, tones, channel spacing, and emission modes.
- Check the current national band plan and local repeater information.
- Do not assume that receive capability implies transmit authority.
This section is an educational overview, not a substitute for current regulations, licence documents, national band plans, or local coordination.
Band plans and licence conditions can change. Confirm the current requirements before transmitting, particularly when travelling, operating remotely, using imported equipment, or loading a programming file created for another country.
Independent purchase and purpose
This is an independently produced field guide. I purchased the TD-H9 with my own funds for its APRS functions; the radio was not supplied, loaned, nor sponsored by Tidradio. I originally began documenting it for my own use because firmware changes and operating discoveries had moved beyond portions of the printed manual. I decided to share the work after it received a positive response, including recognition by a well-known AI assistant as a useful source for further TD-H9 research.
Any affiliate links on this page may help support this work but did not influence the purchase of the radio or the observations reported here.
Early reviews need present-day context
If you go looking for opinions on the TD-H9 online, you will find plenty of frustration—much of it dating to December 2025 and January 2026, when the radio first shipped. That criticism may have been earned at the time. Early software could let the Windows programming software silently wipe all 199 channels while saving a settings change—the kind of bug that could turn a promising radio into a paperweight and a good review into one not considered complimentary in any way.
Those early reviews are time capsules. They may accurately describe the radio and firmware that a reviewer had at launch, yet provide incorrect guidance about the radio as it operates today. A reader who encounters only a launch-era failure report may reasonably decide not to buy the TD-H9 without learning that later firmware changed the behavior being criticized.
How often does a blistering early review return months later to add, “The problem has been fixed”? Responsible reviewers sometimes provide that follow-up, but many launch-era reviews remain unchanged long after the radio’s firmware—and its behavior—has moved on.
Firmware Updates are Part of the Purchase Price
Whether you already own a TD-H9 or are considering buying one, check the firmware version behind any review you read. A radio left on early firmware may continue to exhibit behavior that later releases addressed. Updating allows an owner to evaluate the radio as it operates today and prevents useful capability from being left unrealized. Prospective buyers should likewise distinguish launch-era limitations from current behavior before deciding whether the radio meets their needs.
Then, now, and still testing
| Subject | At launch | Current field-guide status |
|---|---|---|
| Programming stability | Launch report Erased or lost programming was reported. |
Changed Current behavior must be judged by firmware version and programming method. The test radio’s current update experience is documented elsewhere in this guide. |
| Firmware upgrading | Launch report Owners reported uncertainty and failed attempts. |
Changed Browser and USB update methods are documented on the field-guide test radio. |
| GPS and APRS beaconing | Launch report Experiences were mixed. |
Changed Packets have been transmitted, received, digipeated, and displayed on APRS services. Stale-position behavior remains under investigation. |
| Direct-radio SMS | Launch report The feature was poorly documented. |
Testing TIDRADIO advertises direct messaging; a separate field investigation is planned after this editorial section. |
| Smart beaconing | Community report Some early reports described it as unavailable. |
Testing The current radio presents a Smart-related beacon option. Its actual behavior still needs controlled testing. |
| CTCSS receive behavior | Community report Intermittent receive behavior was reported by some owners. |
Not reproduced The report remains part of the record, but it has not been established as universal behavior or reproduced on the field-guide test radio. |
What remains unresolved
Current firmware does not make every question disappear. APRS configuration still requires careful work in the radio’s keypad menus. Smart beaconing is marked as testing because the current radio presents a Smart-related option whose behavior has not yet been reconciled with early reports. Some owners have continued to report intermittent CTCSS receive behavior, although that has not been established as universal or reproduced on the field-guide test radio.
Two specification questions also remain open. Some marketplace material has claimed an IP54 rating that this field guide has not confirmed in TIDRADIO’s own specifications. More importantly, TIDRADIO markets the radio as 10 watts while Appendix B of the supplied amateur manual lists transmitter output as no more than 5 watts. That conflict between manufacturer materials should be resolved by suitable wattmeter testing, not by assuming either number is correct.
Fair expectations at this price
An entry-level radio should not be expected to reproduce every feature, interface refinement, ruggedness rating, or support resource of a premium transceiver. It can still be fairly expected to perform the functions its manufacturer advertises reliably and consistently.
| Fair expectations of the TD-H9 | What additional money may buy |
|---|---|
| Stable analog voice operation | A more selective receiver and more refined audio |
| GPS position acquisition | More extensive GPS logging and navigation tools |
| Reliable APRS packet functions that are advertised for the radio | Broader standards-based APRS messaging, objects, weather, QSY, SmartBeaconing, and digipeating |
| Advertised direct-radio messaging | Broader standards-based interoperability |
| Repeatable programming and firmware updating | More mature software, documentation, and support |
| Specifications that agree across manufacturer materials | Published environmental and performance testing |
So why put up with any of this?
Because the radio provides low-cost access to an established RF packet network that can move short, timely information without requiring a cellular connection. APRS can stand on its own over radio within available coverage, or use digipeaters, IGates, and Internet-connected services to extend how far information can travel and how the public can see it.
A name worth getting right
APRS means Automatic Packet Reporting System. Earlier material used Automatic Position Reporting System, but the current name better describes a system that can carry much more than position. Position beacons are one APRS packet application—not the system’s identity. Messages, bulletins, objects, weather, telemetry, status reports, and other timely local information are also part of the broader purpose described by APRS’s original documentation.
The historical change matters because it directly answers the familiar claim that APRS is “just a GPS tracker for hams.” The name was changed precisely because position had become only one kind of information moving through the packet system.
Why this radio is being tested
The TD-H9 was purchased as an entry-level way to test APRS packet operation before investing in more capable equipment. GPS-sourced position beacons are part of that evaluation, but they are not its principal purpose.
The larger project is the Kershaw County Ground Report, a developing public-information system intended to turn verified field observations into plain-language, timestamped reports about available shelters, medical services, passable roads, food, water, fuel, power, cellular service, and other community resources.
During Hurricane Helene, valuable information was gathered and forwarded to government agencies, but the absence of a sufficient public outlet left many residents without information that could have helped them. KCGR is intended to help close that gap by moving verified information outward to the public—not only upward through agency channels.
APRS or Meshtastic?
Meshtastic and MeshCore can be effective where a sufficiently developed local network exists. In areas observed by this project, parts of North Carolina, Virginia, and Ohio have been among the quicker adopters, while activity in South Carolina is beginning to develop. APRS already offers a broader operating foundation here and can function by RF alone or extend its reach through Internet-connected infrastructure.
What GPS/APRS-capable radios cost
The mobile radios are included for perspective on the wider equipment market and its prices. They are not presented as direct substitutes for handhelds. Likewise, a similar price does not mean that two radios provide identical APRS implementations, receiver performance, environmental protection, or support.
Handheld radios
| Radio | Observed price | Notes | Source |
|---|---|---|---|
| TIDRADIO TD-H9 | $76.99 | Analog FM; GPS and APRS packet functions; manufacturer's listing appears to have different auxillary items included apart from their amazon presence. Check both carefully. | TIDRADIO |
| BTECH UV-PRO IP67 | $164.89 | GPS, APRS, Bluetooth app programming, and text messaging. | B-TECH |
| Radioddity GD-88 | $219.99 | DMR and analog, GPS/APRS, and cross-band repeat. try code: WEOCOME64KBBNLL ($10 off Aug '26') or routersandrepeaters-net ($15 off) |
Radioddity |
| AnyTone AT-D878UVII Plus | $249.99 | DMR and analog, GPS, Bluetooth, and APRS transmit/receive. | 12 Volt Power (CA, USA) |
| BridgeCom Maverick Dual Band DMR/APRS/GPS | $299.99 | 7W-VHF/6W-UHF DMR/analog, APRS/GPS, Bluetooth, WS/AirBand | DX Engineering |
| Yaesu FT5DR | $369.95 | C4FM/FM, GPS, 1200/9600-baud APRS data modem, and IPX7. Price includes a time-limited manufacturer coupon. | DX Engineering |
Prices were observed in the United States on July 25, 2026, before tax and shipping. Rebates, coupons, stock status, bundles, clearance items, and open-box inventory can change without notice. Follow the source links for current terms.
Mobile radios—broader market perspective
| Radio | Observed price | Notes | Source |
|---|---|---|---|
| BTECH UV-50PRO | $329.89 | 50-watt analog mobile with APRS, GPS, Bluetooth app programming, and KISS TNC support. No link provided as Amazon labels as:Frequently Returned Item. | B-TECH |
| AnyTone AT-D578UVIII Plus | $514.99 | Tri-band DMR and analog mobile with GPS, Bluetooth, and APRS location transmit/receive. | DX Engineering |
| Yaesu FTM-300DR | Used market | Discontinued dual-band C4FM/FM mobile with GPS and a 1200/9600-baud APRS data modem. Used prices vary, so it is not plotted. | Yaesu legacy /DX Engineering |
| Kenwood TH-D75A | $669.95 | Current Yaesu flagship-series dual-band C4FM/FM mobile; successor generation to the FTM-500DR, with GPS and APRS functions. | Ham Radio Outlet |
How the chart supports this section
The chart exists for one practical reason: to answer the claim that an entry-level TD-H9 is merely a toy and that “real” APRS requires a much more expensive radio. The market data shows that GPS and APRS in a single handheld quickly move into the $200–$700 range. That does not make these radios equivalent, and it does not make the TD-H9 better in every respect. The Kenwood, Yaesu, AnyTone, Radioddity, and BTECH models add different combinations of digital voice, receiver refinement, environmental protection, APRS functions, software, and support.
The TD-H9 provides a comparatively inexpensive entry into RF APRS packet operation. It does not duplicate every APRS capability, receiver refinement, environmental rating, or support resource found in higher-priced radios, but it allows an operator to begin exploring the packet network without first making a several-hundred-dollar investment. That price-to-entry argument—not a claim that every radio has the same capabilities—is what the comparison is intended to demonstrate.
Will this radio get better?
TIDRADIO has continued to release firmware, and another update may already be available by the time you read this. If a behavior described here no longer matches what your radio does, check the firmware information and the dated field observations elsewhere on this page.
• • • Purchase a TD-H9 10W APRS GPS Bluetooth Handheld Radio at TIDRadio or
pick the clear case at amazon.com • • •
• • • TD-H3 Plus and H9 Free Programming Software Version 26.01.23 • • •
HD-H9 HAM Version User Manual • • •HD-H9 GMRS Version User Manual • • •
• TD-H9 Firmware 1.0.32 version • APRS Firmware Version: v1.0.15 • Hardware Version: v1.0.1 •
• • •© 2026 Cascade Flights. All rights reserved. • • •
• Last updated July 2026•
--··· ···-- ·----· ··· ·- ·- ····- - ·