Modifications for the Kenwood TM-D700



05-01-2000 KENWOOD TM-D700A Extended TX MOD (easy 3 steps)

Just received my new rig, neither the supplier nor Kenwood had the mods available to date.

  1. Remove the bottom cover, 5 screws (not the speaker side).
  2. Locate and remove "W601" (chip resistor) and "W602" (green wire). They are located within 2 inches of the optional VS-3 voice synthesizer board.
  3. Reassemble radio and after power-up, press the reset switch on the front of radio.

Here is your new TRANSMIT range

136.000	- 174.995
400.000	- 469.995

This is the RECEIVE range (mode selected).

118.000	-  135.995
136.000	-  199.995
200.000	-  299.995
300.000	-  399.995
400.000	-  523.995
800.000	-  823.990
849.000	-  869.990
894.000	-  913.990
934.000	- 1299.990

If anyone finds other mods please drop me a line. [email protected]





20-01-2000 TM-D700 CAP/MARS

Thanks to KD4CWB for the basis for this modification

To modify the transmitter to cover 142 - 151.995 Mhz and 420-449.995 Mhz, perform the following steps:

  1. MOST IMPORTANT - this mod will do a reset on your radio and erase ALL of your settings (memory, APRS, menus, etc.). Use the computer program to pull all of the settings out BEFORE you go any further. Or if no computer, a very large tablet. This radio has many many programable features.

  2. Turn off the radio and disconnect the power

  3. Remove the five screws from bottom cover (not the side with the speaker).

  4. Remove the bottom cover. It may take a little prying with a small screwdriver.

    REMEMBER if you haven't saved your settings, all will be lost if you proceed beyond this point.

  5. Cut ONLY the famous Kenwood green wire, located near the voice synthesizer board connector. The green wire ties two PC board lands together and is about 1/2" long. Make sure the ends can't short against anything.

  6. Reinstall the bottom cover.

  7. Reapply power and turn the radio on (it will automatically reset).

  8. Use the computer program to reinstall all of your operating parameters. I found that the load ALL function did not seem to do everything. Try the load MEMORY and MENU selections too. Or prepare to spend a whole bunch of time re-entering all of your parameters that you wrote down in step 1.




08-04-2000 Kenwood TM-D700A service mode
Author: Steven Seeger - [email protected]


The TM-D700 A/E has a service mode that lets you adjust many parameters of the radio for both bands. The setup is easy, and the following things can be adjusted:

Squelch open sensitivity
S meter calibration
Transmission output power (adjust at lower limit frequency, center frequency, upper frequency of both bands)
Transmission deviation
DCS modulation balance
Tone deviation
DCS deviation

To get into the mode, short pins 3 and 6 of the 6 pin data radio terminal.

      _6___
     /  O||O 
     | O    O|3
     |   OO  |
     ---------/
Sorry for the bad drawing, but consider each O a pin on the jack. The center slot for the plastic tab in the connector is on top of this. Pin 6 is on the upper left, pin 3 is on the right middle. With the radio powered off, short these two pins together.

Now, hold down the F and the TONE key and turn the power ON. The radio will come up with 144.000 and some data on the right side. The menus will look like they do when you're in the MNU. Use the left and right buttons to change things.

Using the <- and -> selections on the menu, you can scroll through the options. According to this spec sheet here, the radio can be set to 60W on 2 meters and 42W on 440. ALL ADJUSTMENTS ARE MADE FOR EACH BAND SEPARATELY.

Be sure to do power adjustment into a 50 ohm dummy load!

Do not worry if you don't recognize these menu names. Many of them are graphical on the bottom that change with the mode you're in.

VFO, MR, ENCODER (the left wheel), MHZ, and BAND SEL (the buttons you push to change bands) all function in this mode.

To adjust squelch sensitivity, put the desired signal on the antenna connector and press SET. (menu item on the bottom.)

To adjust the S meter, put a signal you want for S1 on the connector and press the S1 button on the bottom. Same goes for S7.

Output power is adjusted by selecting FREQ1,2, or 3 which sets different frequencies. Key down the mic and transmit into the dummy load. Turn the encoder left or right to adjust output power. Press LOW to adjust for low, medium, and high power. (make high power 5W and low power 50W, impress your friends!)

Transmission deviation is adjusted with the <- and -> buttons. There's a MAX DEV setting if you want to bleed over to adjacant frequencies. (piss off your friends!) Press the SET key to set it.

DCS modulation balance is set with <- and -> and by pressing the SET key.

Same goes for TONE deviation and DCS deviation.

Enjoy!

-Steve KF6WJH