Modifications for the Yaesu
FT-5100
19-07-1998 Addtional feature on Yaesu
FT-5100 found: adjustable timeout
I discovered by accidental
application of fat finger: if the high/low button is held while turning on
power, that transmitter time-out may be set. If you do this, the left VFO
display will show some number between 00 and 60. The factory default appears to
be 15. The number can be changed by rotating the frequency knob.
I tried
an experiment, setting the number to 01. I keyed up into a dummy load. After one
minute, the transmitter shut off with, "Err" displayed in the VFO.
I'll
leave it up to you to decide a use for this feature. If you're an O.F. from HF
that can't seem to break the habbit of timing out repeaters, you could set your
own time-out.
What would be neat would be to have a way to adjust RF
power level in a similar fashion, but examining the schematic diagram, it looks
like only two power levels are possible.
By the way, the technical manual
for the 5100 is finally available. The information is pretty spare. No additonal
operating notes or hidden secrets are revealed. It is worthwile for the
alignment notes and complete parts list. Call the number in your owners manual
to order.
19-07-1998 Backlight
Control
Effect: manual control of backlight
- Hold down the MHZ key and turn radio on
- Use tuning knob to adjust brightness
- When FUNC is active, the tuning knob will adjust brightness again.
- You can restore automatic control by repeating step 1.
Notes:
Manual is fuzzy on this feature.
Attributed: Yaesu
19-07-1998 Crossband
Repeat
(reported as working on 5100 and 5200):
Effect:
Enable crossband repeat
- Dial up two frequencies you want to crosslink (be sure to pay attention to
transmit offsets, if any)
- Turn radio off.
- Hold down the RPT key and turn radio on
Result: The tone
encode/decode flags and the -+ flags will be flashing and the radio will be in
low power mode. When either band's squelch opens, the other band is moved into
the primary frequency display and the transmitter keys. Audio link appears to be
speaker to mike.
Exit crossband repeat mode by repeating steps 2 and 3
above.
Attributed: Yaesu
19-07-1998 Transmitter
Timeout
Effect: automatically limit transmitter "on" time
- Hold down the HIGH/LOW button and turn radio on
- Use tuning knob to change the number in left VFO. This number is number of
minutes for the timeout timer. The factory default appears to be 15 minutes.
- Transmitter shuts off with "Err" displayed in VFO if the time limit is
exceeded.
Attributed: Bill Mayhew, N8WED,
[email protected]
19-07-1998 Crossband Audio
Enhancement
Effect: unmuffle crossband audio
Connect a 27K
ohm resistor between the audio-in and auido-out leads on the data jack (inside
the shell of a mini plug, that is). The mic element stays live while in xband
operation. It is a good idea to remove the mic from the rig while cross banding
if you need/want to eliminate ambient audio.
Attributed: Bill Mayhew,
N8WED, [email protected]
19-07-1998 The 'P' Key on the
microphone
I was curious about that "P" key on my FT-5100, so I
called Yeasu and they explained the situation. They designed the the mic to
accomidate "future products". The "P" key is there to be taken advantage of at a
later date by other models. They just did not want to re-design the mic again
within a short period of time.
Attributed: Will Collier, KB5WRK,
[email protected]
19-07-1998 Expanded Receive
Good Effect: enable extended receive coverage
New range: 128-180MHz and 420-475MHz
Bad Effect: disable automatic repeater shift selection.
Warning: This mod does not apply to the FT-5200 as the design
is somewhat different.
Warning: You must have a very steady hand or else! A
magnifying glass would help too.
- Disconnect DC Power cable from radio. ALWAYS!
**Caution**
NEVER
TRY TO TAKE APART (DISASSEMLBLE) THE FRONT CONTROL HEAD. It will void your
warranty.
- Remove (6) screws from Top Cover of Radio and (6) screws from Bottom Cover
of radio.
- Remove Top & Bottom Covers from Radio (Be careful of speaker falling
out).
- Remove the (2) silver screws on each side of the radio holding front
control head to main body of radio.
- Carefully pull away (a few inches) the Control Head from the radio body.
CAREFUL with the Ribbon Cables.
**NOTE**
There are no numbers on the
circuit board so you will have to match up with the diagram below.
- On the rear of the Control head locate, Unsolder and remove jumper Pad
R4072.
- Solder across jumper pads: R4070 R4068 & R4064 (use wire or 0 Ohm
resistor)
**NOTE**
If you want to change the D/MR button on the
microphone to do Band Switching, now is the time.
See the next mod.
- Install Front Control head, Speaker, Top and Bottom Covers and Reconnect
Power to the Radio.
- Press and hold [D/MR] [F/W] [REV] Keys and turn on the Radio. Radio will
now show 300.000 & 20.000 on Display.
- Set UHF Rx Low - Press [MHz] and dial 420.00, press [D/MR]
- Set UHF Rx High- Press [MHz] and dial 475.00, press [D/MR]
- Set UHF Tx Low - Press [MHz] and dial 420.00, press [D/MR]
- Set UHF Tx High- Press [MHz] and dial 450.00, press [D/MR]
- Set VHF Rx Low - Press [MHz] and dial 128.00, press [D/MR]
- Set VHF Rx High- Press [MHz] and dial 180.00, press [D/MR]
- Set VHF Tx Low - Press [MHz] and dial 140.00, press [D/MR]
- Set VHF Tx High- Press [MHz] and dial 150.00, press [D/MR]
- Set UHF offset - Press [F/W] then [RPT] dial 5.000 press [RPT]
- Set UHF tuning - Press [F/W] then [REV] dial 25.0 press [RPT]
- Set VHF offset - Press [F/W] then [RPT] dial 0.600 press [RPT]
- Set VHF tuning - Press [F/W] then [REV] dial 20.0 press [RPT]
(VHF
tuning step varies by state -- many use 15.0)
Diagram: [there are
no tabs in this section - ed]
Ok, here's where it gets tricky, but so you know, a '|'
represents a jumper.
!Ribbon ! !Ribbon !
!Cable ! !Cable !
____!J4002 !_______________________!J4001 !_____________
! !________! !________! !
! Rear view of FT-5100 !
! ____ Control Head. !
! ! ! !
! !__! | | | | | !
! | | | | | | | | | | | | | | | | !
! R R R R R R R R R R R R R R R R !
! 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 !
! 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 !
! 5 6 6 6 6 6 6 6 6 6 7 7 7 0 0 0 !
! 1 1 2 3 4 5 6 7 8 9 0 1 2 1 3 4 !
!__________________________________________________________!
Stock US Jumpers After Mod. Jumpers
R4001 R4001
R4003 R4003
R4004 R4004
R4051 R4051
R4061 R4061
R4062 R4062
R4064
R4067 <- for D/MR button mod
R4068
R4070
R4072
This mod is on Delphi as FT5100.MOD and on
anomaly.sbs.com.
Attributed: Tony Pelliccio, KD1NR
[email protected]
19-07-1998 Band Switching and Tone Burst via
D/MR button on microphone
Effect: D/MR button on microphone
performs band switching rather than D/MR function.
- as in above mod
- as in above mod
- as in above mod
- as in above mod
- as in above mod
- Remove the jumper on Pad R4067
- skip above step 7
- continue with step 8 above
For tone burst:
- as in above mod
- as in above mod
- as in above mod
- as in above mod
- as in above mod
- Add the jumper or 0 Ohm resistor on Pad R4065
- skip above step 7
- continue with step 8 above
Attributed: Tony Pelliccio, KD1NR
[email protected]
19-07-1998 FT-5100 Copy Memory To
Computer
Hello OM!
If you are a happy owner of the YAESU
FT5100 and a computer, here you have a nice project. This is how you make a copy
of the FT5100 memory into a computer file, then you can have a number of files
for different locations, for backup etc. You need a converter RS232<=>TTL
and some terminal program for your computer, say the MS-Windows Term.
The
FT5100 read and write serial data at 9600bps 8N1.
MIC-pin 1 = serial TTL
data input.
MIC-pin 6 = serial TTL data output.
MIC-pin 7 = GND.
I
used the MAXIM MAX232 IC for the conversion of TTL level 0/+5 volt, and the
RS232 level of +12/-12 volt for the computer.
Turn on your FT5100 while
holding down the F/W button, then press RPT for transmitting data from the
FT5100 or the REV button for receiving data into the FT5100.
While
capture data from the FT5100 into a file, make sure that you get all the
control-characters. There are 1277 characters to be saved.
When
transmitting data from a file to the FT5100 make sure that your terminal program
makes some delay between the characters, or you will get the FT5100 showing an
Err-Err display.
Yes I know, this is a short info, but i hope that you
get the idea.
19-07-1998 Yaesu FT-5100 CAT/Remote Control
Mike Interface
I own a FT-5100 and became interested in the
Remote Control Mike, not for its wirelessness, but because it can control most
of the radio's features via a serial data stream through the mircophone
jack.
Although I do not own the wireless mike, I was able to build an
interface between my PC and my 5100. It is somewhat similar to the CAT interface
I have built for my FT-757 HF rig, but mostly like the interface described in
the FT-912R manual (loaned to me via a friend from Yaesu). I have recently been
working on a micro-controller based radio controller which I use for transmitter
hunts, and other ham related activities, and I plan to allow it to control my
5100 soon, but so far I have only controlled the radio from my PC. When using my
PC as the source for the serial data, I used a MAX232 chip for a level
conversion between the +/- 12 volts levels on the computer and the 0-5 volt
levels on the radio.
The serial data paramaters are 4800 N82. The
commands sent to the radio are simple one byte instructions. The RMC mode ON
command (16) must be sent before any other command. When the RMC mode is ON, a
small LCD "RMC" icon will light on the display (see owners manual under
Display). Also, the Vol, Sql, and Bal knobs are disabled when in the RMC mode
because they will be controlled via serial commands, but all other buttons are
still active.
The commands are as follows:
0 - RPT 12 - CALL 24 - SQL Up
2 - REV 14 - BAND 26 - VOL Up
4 - MHZ 16 - RMC 28 - BAL Right
6 - D/MR 18 - SUB 30 - BAL Left
8 - TONE 20 - PAGE 32 - SQL Down
10 - LOW 22 - F/W 33 - VOL Down
The interface I built simply wired mike port pin 7 to serial ground and
pins 1 and 3 each through a diode then together, to the serial source. Note: I
am not a hardware person! Use this hardware at your own risk.
+----1 7-------------- GND
| 2 8 6 (These can be connected to a MAX232
| +--3 5 +-+-------- SER IN or the FIF-232C pins 1 and 3)
| | 4 | |
| +--->|---+ |
+----->|-----+
You can wire 1 and 3 together first, then through 1 diode, but that
disables the UP and DOWN buttons.
I will continue to study this more. If
anyone would like to know more, or has any corrections or feedback, please email
me.
19-07-1998
Transforming the Yaesu FT-5100 for 9600 baud
*** Do read these instructions carefully ***Hello user of a
FT-5100. The following instructions describe one possibility to transform the
FT-5100 (not tested with a FT-5200) for Packet Radio using 9600 baud.
I want
to point out that before starting, you should be familiar with a soldering iron,
and have some knowledge in electronics. If not, ask a friend who knows how to
handle this. The transformation does not require a genius, but the transceiver
does not pardon mistakes.
Let's start:
You will need a schematic
diagram, a soldering iron, a capacitor of 100nF, two resistors of 30kOhm, 30cm
(1 foot) of 4 wire cable and a 4 pin socket. Open the transceiver. (Attention:
you lose your warranty!) Solder one side of the 4 wire cable at the 4 pin
socket, no matter with way.
Thereafter, you need to enter the cable into the
transceiver. Have a look at the rear side. On your right, you see a fourth, not
used exit. It's covered by a small piece of polyvinyl, held by two screws.
Unscrew it and you have a clean possibility to get the cable
inside.
Doing the transformation at the reception side:
Get the LF at
the de-modulator. That's pin 9 at IC MC3372ML (Q404) on the IF unit.
Solder
one wire at this pin.
Therewith you are already now able to receive 9600 baud
on 70cm and simultaneously, you are still able to work with 1200 baud on 2m or
70cm using the data-connector.
You may also still do phone using the
microphone connector.
Doing the transformation at the transmitting
side:
First, solder the resistor of 30kOhm at pin 13 of IC MB1504PF-G-BND
(Q701) on the 430-PLL-UNIT. Put into series the capacitor of 100nF. Now, solder
the second wire at the capacitor. Now, the FT-5100 is nearly ready for
transmission. Let's do the PTT switching.
Several tries using the
data-connector did not work. What happens to be ok for 1200 baud has to
considered disastrous for 9600 baud. But using the microphone jack, it is
possible. Open the front panel and solder the third wire to pin 6 of the
connector.
When this has been done, all PTT problems are gone.
Last but
not least, solder the last wire to ground on each side.
That's all. Not too
difficult, isn't it?
Please, check all soldering before the re-assembly. This
may avoid later trouble.
The transformation is done. Now, you just need to
connect the TNC. Because everybody connected his socket in a different way, have
a look at the TNC manual how to connect the right pins. Now you may do your
first try.
In general:
After the re-assembly, it should work
immediately with 9600 baud, of course your TNC has to be set-up properly. I owe
an USCC card with 3 channels and I am using this set-up without trouble.
TX-delay may be adjusted till a minimum setting of 7ms. You should always keep
in mind, it's no data transceiver, it's still a phone transceiver. Do not expect
superb results.
Nevertheless, until today, I do not see a disadvantage
compared to commercial 9600 baud transceivers.
Disclaimer:
You
may not declare me being responsible for any destruction due to this
transformation. It should show you hoe it is possible to use a FT-5100 for 9600
baud. I never had problems, why should others...
This transformation is
probably not the very last you may get out of this transceiver. I am always
looking for other possibilities to improve it. Have fun and a lot of success
using 9600 baud.
73 de Serge, LX1KX @ LX0PRG.LUX.EU
19-07-1998 Yaesu FT-5100 on 9600
Bauds
There is also mention of the Yaesu FT-5100 dual-band
transceiver being 9600 baud ready in the February 1994 QST (Packet Perspective
p.98). Stan WA1LOU writes that he spoke with Chip Margelli K7JA of Yeasu
Customer Service. The bottem line is:
Yes the FT-5100 will do 9600 baud
out of the box. The Japanese manufactures have agreed upon a standard. The spec
calls for a transmit signal input level of 2 V p-p at 10 kohm. The receive
output as 300 mV p-p at 1 kohm from 50Hz to 5 kHz, + or - 3 dB. All transceivers
that conform to this standard will provide a 6-pin miniature DIN jack for the
9600 baud modem interface. However the FT-5100 was developed prior to the
adoption of the standard, so it does not feature the DIN port. According to
Chip, future Yeasu radios will feature the 9600 baud standard port and
optimization. Icom and Standard are mentioned as other manufactures adopting the
standard.
Stan says they [QST] will "review the capabilities of each in a
future issue."
[the above is paraphrased from QST]
I visited the
HRO store in Sunnyvale and looked at the FT-5100. There is what seems like a
miniture jack connection on the back of the radio, not a DIN as the future
standard will provide. I didn't ask to see the manual from the sales people. The
questions I would liked answered are the same as Walt and John expressed in
their missives.
Think about it - 9600 baud is now in the reach of
everyone. Especially think of the impact it will have on the 9600 baud pacsats.
The microsats required at least one all mode radio for the PSK downlink which is
not an inexpensive radio. Now, if the Icom or Yeasu radio can do both the up and
down link for $700.00 more people will (hopefully) just on the bandwagon. Don't
flame me for the price, I for one have been struggling with 9600 baud trying to
convert my Kenwood TR-751 and TR-851. I still don't have it right and I have had
to repair my TR-851 twice after the PLL went out and I zapped the FM chip. How
can you advocate others to get on the air will 9600 baud when you tell them to
open up and possibly zapp their $700.00 radio?
It would be nice to learn
if these radios can be used for the UoSats and Kitsats. Anyone have any
experience with either the Yeasu or Icom radios?
73 Steve
N7HPR
[email protected] (Naval Postgraduate School, Monterey,
CA)
19-07-1998 General
Review (with 5100 slant)
Since Yaesu's advertising has already
made the good points known, I'll concentrate on the warts and
shortcomings.
Dual In-Band Receive: works as advertised except for
sensitivity. The "main" receiver works very well. The "sub" receiver works very
well when tuned to the opposite band from the "main" receiver. When tuned to the
same band, the "sub" receiver suffers from slightly lower sensitivity in the ham
bands and greatly reduced sensitivity out of the ham bands.
There is a 2m
VCO/PLL/IF and a 70cm VCO/PLL/IF. I assume that dual in band receive is done
with the opposite band's receiver. This would explain the poor sensitivity, but
it sure raises some questions about how the duplexer works.
I expected a
type "N" connector, the radio came with UHF.
Control wart: (are you
listening Yaesu?) You can only transmit on the "main" (ie. left) side of the
radio. When both 2m and 70cm receive are active, you change bands with the
"BAND" button. This swaps the left and right displays. When dual in-band receive
is active, the "BAND" button changes both the main and sub receivers from 2m to
440 or from 440 to 2m. Arrrgh!!!! I would prefer a "SWAP" button to swap left
and right regardless of mode. (The "SUB" button is used
instead.)
Automatic backlight dim: works as advertised but the backlight
level under low ambient lighting is WAY too low. Manual control is the best
solution.
DTMF page: works as advertized, but the *&%$#@ thing
insists on "ringing" like a phone EVERY time it receives the page sequence. This
means that you have to co-ordinate with the other station to turn the *&%$#@
DTMF stuff off at the same time or tolerate the "ring" at the start of every
receive.
CTCSS decode: squelch opens quickly when normal CTCSS decode (an
option) is enabled. There is a CTCSS page function that has a distinct delay
between receipt of carrier with CTCSS and open squelch. I don't yet understand
the use of this "feature."
There is no SCAN button on the front panel.
Scan is initiated by holding the up or down button of the mike down for two
seconds. The scan is blindingly fast when compared to the Alinco 590 that I used
to have.
Memory: memory is divided into four "banks." Two for VHF, two
for UHF. Only one bank can be active for each receiver. I consider this an
advantage, but you may not. There are two obvious (to me) uses for this
configuration. First, you can store frequencies for different uses in different
banks. Second, you can activate one 2m(440) bank in the main receiver and one
the other 2m(440) bank in the other receiver and scan them
simultaneously.
Heat management: After seeing the HUGE heat sink on the
back of the Alinco 590, the Yaesu 5100's sink seems too small. In a key down
experiment, the heat sink of the Yaesu got almost too hot to touch before the
fan kicked on. If I were planning to run a packet station, I would definitely
look into some extra forced air over the back of this one. As it is, I'm a bit
concerned about how hot it will get mounted in my dashboard. [Others people
don't seem to have this problem.]
DTMF Decode and Scan: If you have CTCSS
decode (an option) enabled on a memory and you are scanning and there is
activity on that frequency but without the correct CTCSS tone, the 5100 stops
scan, flashes the strength meter and then continues scanning. It is slower than
normal scan, but still quite fast.
Attributed: Brian McMinn, N5PSS,
[email protected]
19-07-1998 DTMF
decoding
Effect: display decoded DTMF tones
Ed Note: this
works on the FT-530, but not on my 5100. I'm including it here on the chance
that it works on the 5200. Please try it on your 5200 (or 5100) and tell me if
it works for you.
- Select frequency and turn on the code squelch
- Press Function-Page(Code) to select a code memory
- Dial up to memory #7 [the 5100 won't do this]
- Watch the dtmf's scroll by as they are heard by the radio!
Attributed: [email protected] (Jeff Meyers)
18-12-1998 FT-5100 Random reset
fix
March 19, 1995
By KA0RNY
Hi
everybody.
I've owned a Yaesu FT-5100 for about a year and a half and I'm
delighted with the rig. Recently, I've experienced two mysterious resets of the
rig that have required complete reprogramming of the memories. Since I did the
extended receive mod, it also requires reprogramming of the upper and lower RX
and TX limits for both VHF and UHF. Both resets occured while using the rig in
my Chevy S-10 4x4. The mount I use in the S-10 is a cellular style single post
mount that does a nice job of not being in the way, but is prone to vibration of
the radio. In my work vehicle I use a Motorola floor mount that does an
excellent job of holding the radio sturdy.
Since I brought the rig into
the house to do the job of repro-gramming, I decided to open it up and look for
any sign of loose hardware or broken cabling. I found that the flat printed
cable that runs between the main chassis and the control head circuit board
(those that have done the extended RX/TX mod and/or the microphone D/MR button
to band change mod will know what I mean) was slightly deformed. Close
investigation revealed that there are several metal tabs protruding through the
board that are from the metal frame that holds the LCD in place. These tabs are
bent slightly to lock the frame to the circuit board. Unfortunately, the flat
cable folds and presses tightly against two of the tabs along the edge of the
cotrol head circuit board. I noticed that at least one conductor may have been
exposed by pressure on the tab. This probably resulted in this line being
grounded at some time, a situation that was likely aggravated by vibration in my
S-10.
My fix of this problem was to put a small piece of electrical tape
over the sharp corner of each tab, then a larger piece that entirely covers the
tab and adheres to both the circuit board and the inside of the bezel. Now there
is a double layer of tape between the tab and the flat cable, also you may want
to put a layer of tape on the flat cable for additional protection. As near as I
could tell, the wire was not broken (whew!) by the contact.
Now time will
tell if this was the cause my mysterious resets or if the trouble is elsewhere.
One thing I am certain of is that I probably headed of some other problem by
doing this, like an all expense paid trip for my radio to Yaesu USA! If you are
unsure of how to access this area of your FT-5100, complete details can be found
in the extended RX/TX mod sheet available on a lot of BBSs.
If nothing
else, send me a packet message and I'll send a copy your way.
73 es GUD
luck! de Nate
KA0RNY @ KB5TBQ.#NCOK.OK.USA.NOAM
Update:
It's been over three and one half years since I applied this fix
and so far (knock on wood!) the problem has not re-occured. I've not seen any
other mention of this problem, so perhaps this was an isolated case.
73,
de Nate
Packet: KA0RNY @ WF0A.#SCKS.KS.USA.NOAM
E-mail:
[email protected]
Valley Center, Kansas USA EM17hs
Visit my Linux + Ham
Radio pages homepage.netspaceonline.com/~ka0rny/
31-03-1999 FT-5100 fuer
9600bd
de DK9SJ @ DB0LX.BW.DEU.EU
Es wurden 2
FT5100 untersucht. Lieferdatum Anfang Maerz 93.
- Das FT5100 ist ca 14x15x4cm gross, 2m/70cm Duobander. Hervorragend
aufgebaut, trotz Miniformat noch genuegend Platz um ein TNC2M
einzubauen.
- Der Senderfrequenzgang (Data-in Buchse, Breitbandempfaenger z. Messung)
reicht von ca 60 bis 5000 Hz (-3dB) bzw von 30 bis 7000 Hz (-10 dB).
Die
untere Grenzfrequenz ist fuer 9600 Baud G3RUH-Modems zu hoch. Trotzdem laesst
sich das Signal des 5100 mit 9600 Baud mit vernuenftiger Bitfehlerrate
senderseitig betreiben. Zum Packet-Senden muss das Mikrophon ausgesteckt
werden.
- Die Kombination RX-TX (je FT5100) hat einen Frequenzgang von 70 bis 500 Hz
(-3dB) bzw. von 35Hz bis 2,5 kHz (-10 dB). Die untere Grenzfrequenz dieser
Anordnung ist fuer G3RUH Modems etwas zu hoch, die obere Grenzfrequenz ist
viel zu niedrig, fuer G3RUH Signale ungeeignet, G3RUH empfiehlt 5 kHz bei
-3dB.
Die NF ist nach dem Squelch-Schalter angeschlossen, anstatt direkt am
Demodulator. Dazwischen liegen Stufen mit Tiefpassverhalten.
Folgerung: Fuer 9600 Baud nicht mehr und nicht weniger geeignet als
jedes vergleichbare FM-Mobilgeraet: Modifikation ist erforderlich. Die
Data-Buchsen sind für externe Anschluesse vorteilhaft.
Grundsaetzlich
sind PLL-Funkgeraete fuer 9600 Baud wenig geeignet: Die PLL braucht typisch
100-200 ms bis das Sendesignal steht bzw. der RX bereit ist.
Das sind schon
10-30 % der Paketdauer. Wuenschenswert sind hier 5-10 ms ! Die PLL regelt
Modulationsfrequenzen unterhalb der PLL-Tiefpassfrequens aus, d.h. dass ein
Abfall von -3dB pro Oktave ab etwa 100 Hz typisch ist. Setzt man die
Tiefpass-Grenzfrequenz herab, so verlaengert sich die
Einschwingdauer.
Ideal sind einfachste Quarzsender und Empfaenger, deren
PLL nicht in der Frequenz umgeschaltet wird.
vy 73 ! Ulf,
DK9SJ
From: DG9MHZ @ DB0AAB.#BAY.DEU.EU (Deti)
Hallo
Leute,
Ein Freund kam frustriert mit seinem FT5100 unterm Arm zu mir und
sagte, daß des Ding trotz spezieller Buchse nicht für 9k6 Daten funktioniert.
Zuerst wollte ich das nicht glauben, aber nach kurzem Test war ich auch davon
überzeugt. Daraufhin erfolgte ein Blick in den Schaltplan, der freundlicherweise
von Yaesu mitgeliefert wurde. Hm ...
Wollten die Jungs doch glatt das RX
Signal erstmal Tiefpaßfiltern.. ärgerlich und die PTT Information kommt auf dem
TX-Signal daher - komisch - irgendwie bleibt doch da die
Gleichspannungskopplung, die für einen wirklich guten Frequenzgang notwendig
ist, auf der Strecke.
Daraufhin nahm ich ein 4 adriges Flachbandkabel und
hab
- das RX Signal direkt vom PIN 9 des ZF ICs auf der (IF-UNIT geholt)
- das TX Signal über einen zusätzlichen 10K Widerstand bei der UHF-PLL UNIT
auf den MOD-Eingang gegeben.
- die PTT Leitung auf der Steckerleiste vom Bedienteil zur MAIN-UNIT (PIN2)
angelötet....
Und siehe da nun tuts - für mich stellt sich nun die
Frage ... hätte man das auch einfacher hinbekommen können oder soll der
Datenstecker auf der Rückseite des Geräts wirklich die Phantasie der Benutzer
anregen?
Beste Grüße aus München
Deti
Have you any tips, trick or modifications you can't find
here, please E-mail them to me, or use
the mail form.
Can't you
find a mods, please don't e-mail to me. All mods i have is listed on this
site. Back to start
page |