Mods for Kenwood TM941A  Triple band radio

CAP mod---cut green wire behind control panel next to speaker jack.
  TX 142-152    420-450    1100-1400
  RX 117-174*   400-490    1100-1400 
* AM detector is switched on for aircraft band

Crossband mod
Open bottom cover of radio and set the radio with control head facing you. 2 
  inches over from the left side of case and on back of first board is unlabeled
  blue chip resistor R58.  Remove resistor. 

Select one band with PTT indicator and the other with green indicator
  for crossband repeat or
Select one band with both PTT and green indicator.  (Once activated whatever
  is received on the two non-selected bands will be transmitted on the 
  selected band.
To activate, press F for 2 seconds and then push Mute. Once activated all
  functions are disabled, including the PTT key.  (In cross band repeat the 
  non-active band can be selected with control select and its frequency change.)
To deactivate, repeat the same as above--if activity happens during
  crossband deactivation you must start over--or you can use control select 
  to select inactive band and then deactivate.
When the unit is transmitting any noise heard by the microphone will also be
 transmitted.

Wide band frequency mod.
  Reconnect green wire behind control panel
  Remove R19 and R20 in control head. (remove the two screws on the back 
  of the control head and remove back.  Four Blue resistors will be found
  on lower left side.  The are labeled R19, R20, R21, R22.)

  RX 135-174    400-500   1100-1400
  TX 135-174    400-500   1100-1400
  actual operation over the entire span was not verified.

  The radio wakes up in European mode, therefore frequency steps will need to 
  be reset.
  No aircraft VFO control with this mod--When the green wire is cut, 
  aircraft frequency can be entered and stored into memory. 
  Note: When the green wire is cut, the shift key no longer works and odd
  splits can not be entered into memory.  The state of the wire only 
  seams to mater when power is turned on. 

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Other information found along the way to the above mods.

remove 19 in control head (green wire doesn't matter)
  RX 1??-174    400-500    1100-1400
  TX 135-174    420-450    1100-1400

remove R20 in control head.  (Green wire cut)
  RX 1??-174    400-500    1100-1400
  TX 135-174    400-500    1100-1400

The shift key no longer works--displays the Co bell
special tx frequency input doesn't work--causes memory scan
instead of offset input.
2-meter stops receiving or transmitting but looks like it does anyway--
possibly receives in AM only
frequency steps sizes are cleared to 10 mhz in UHF--must be reset

remove R21 in control head. Tested with green wire cute 
  TX 144-146   430-440  1240-1300
  RX 130-174   400-470  1100-1400

remove R22 in control head.  Tested with green wire cut.
  TX 144-146  430-440  1240-1300
  RX 144-146  430-440  1240-1300   not verified

remove R19, R20 and R21 and/or R22 (green wire doesn't mater)
same symptoms as above with R20 removed and green wire cut.
  TX and RX frequencies not noted

I am told that removing R56 (I'm fairly sure that's the blue resistor 3 7/8 
inches over and 1 inch up on same board as cross band mod resistor) results in 
only high and low power (no medium) control on all bands.

Please let me know if you find out any other mod or find errors in this doc.
Thanks to Mike wa7rps for crossband and CAP mods.

Mike Hugo                  ka6oij@wa6ybn.#cenca.ca.na.usa
1313 Autumn Ave.
Ridgecrest, CA 93555

 ... ...-....012000 N81N