Subject: MODIFICATION FOR KENWOOD TM-261
Date: Tue, 1 Sep 1998 15:21:51 -0600

THE KENWOOD TM-261 MARS/CAP MODIFICATION INFORMATION
TX-142-152 MHZ
RANDY SCHEIN KK7CN
2 LT CAP/COMMUNICATION TECHNICIAN
9-01-1998
kk7cn@sisna.com

IT IS ILLEGAL TO OPERATE OUTSIDE THE LIMITS OF YOUR CLASS OF LICENSE OR PERMITS

1.DISCONNECT THE POWER CORD AND ANTENNA COAX FROM TRANSCIEVER

2.REMOVE THE TOP COVER (2 SCREWS)

3.LOCATE A GREEN JUMPER WIRE LABELED W2

4.CUT THE GREEN WIRE IN HALF AND INSULTATE  BOTH ENDS

5.INSTALL THE TOP COVER AND RECONNECT THE POWER CORD AND ANTENNA

6.RESET THE MICROPROCESSOR BY HOLDING THE MR KEY DEPRESSED AS POWER IS TURNED ON

7.MODIFICATION IS COMPLETED


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The modulation that is set on the TM-261A from the factory isn't always up
to snuff. After having to repeat myself for about the
50th time in a month, I decide it was time to "turn it up".

1) Open the top of radio by removing to 2 screws and pulling up from
the back of the lid.

2) Find VR3 and adjust clockwise until desired audio level is reached.
(Mine is set to about > up)

3) Put the lid back on and stop repeating yourself.


73,
KC8EVB
Email: kc8evb@letarc.net

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Kenwood
Application Note
AAN-0019
Amateur Radio Division

Subject: TM-261A CLONING FEATURE
Date: 10/11/96

This modification is provided as is and is subject to change
without notice.  Kenwood Service Corporation makes no warrant 
of any kind with regard to this modification procedure, including, 
but no limited to, the implied warranties of merchantability and 
fitness for a particular purpose.  Kenwood Service Corporation shall not be 
liable for any error or for incidental or consequential damage 
in conjunction with the furnishing, performance, or use of this 
modification procedure.

The TM-261A is equipped with a wireless cloning feature.  This 
allows the memory channel data of one TM-261A to be copied to 
other similarly equipped TM-261A transceivers.  Wireless cloning 
makes special event frequency coordination a much easier 
task to manage.  The procedure for cloning is as follows:

PROCEDURE:

1. Designate one TM-261A as the Master transceiver and program 
it with all the pertinent memory channel data.

2. Select a common simplex frequency for both the Master and Slave 
transceivers.

3. Turn off all transceivers.

4. Turn on all transceivers while holding the [MHz] and [Tone] keys
depressed.  All units should now display the word CLONE.

5. Connect the Master transceiver to a 50 ohm load and connect 
the Slave transceivers to their appropriate antenna.

6. Momentarily press the microphone PTT switch on the Master 
transceiver.  The Master transceiver will begin transmitting 
a series of DTMF signals to the Slave transceivers which will 
reprogram their memory channels and the data contained in the 
Master transceiver.

7. When the data transfer is successfully completed, all 
transceivers will display the word END.  Should there be a break 
in reception during data transfer, the Slave transceivers  
will display ERR.  If this occurs, simply repeat the steps 
listed above.

8. Turn all transceivers off and then back on to return to 
the normal operating mode.

NOTES:

1. Master and Slave transceivers must have the same 
frequency configurations such as all must be stock or all 
must be modified for MAR/CAP.

2. Cloning from a TM-261A to a different model transceivers 
is not possible.

3. Transmit power output automatically goes low during cloning.