Modifications for the Kenwood TR-3500

TR-2500/3500 dip switch setting


The following is a list of the Dip Switch settings for the Kenwood TR-2500/3500.
It is mainly intended for those who have the radio but lack the info.
              1=ON
              0=OFF
                            SWITCHES
FREQUENCY                 !1-2-3-4-5-6
---------                  -----------
 67.0                      1 1 1 1 1 1
 71.9                      1 1 1 1 0 1
 74.4                      1 1 1 0 1 1
 77.0                      1 1 1 1 0 0
 79.7                      1 1 0 1 1 1
 82.5                      1 1 1 0 0 1
 85.4                      1 1 0 0 1 1
 88.5                      1 1 1 0 0 0
 91.5                      1 0 1 1 1 1
 94.8                      1 1 0 1 0 1
100.0                      1 1 0 1 0 0
103.5                      1 1 0 0 0 1
107.2                      1 1 0 0 0 0
110.9                      1 0 1 1 0 1
114.8                      1 0 1 1 0 0
118.8                      1 0 1 0 0 1
123.0                      1 0 1 0 0 0
127.3                      1 0 0 1 0 1
131.8                      1 0 0 1 0 0
136.5                      1 0 0 0 0 1
141.3                      1 0 0 0 0 0
146.2                      0 1 1 1 0 1
151.4                      0 0 1 1 0 0
156.7                      0 1 1 0 0 1
162.2                      0 1 1 0 0 0
167.9                      0 1 0 1 0 1
173.8                      0 1 0 1 0 0
179.9                      0 1 0 0 0 1
186.2                      0 1 0 0 0 0
192.8                      0 0 1 1 0 1
203.5                      0 0 1 1 0 0
210.7                      0 0 1 0 0 1
218.1                      0 0 1 0 0 0
225.7                      0 0 0 1 0 1
233.6                      0 0 0 1 0 0
241.8                      0 0 0 0 0 1
250.3                      0 0 0 0 0 0
Extended frequency TR-2600A


Here is some info on the kenwood model tr-2600a handie - talkie....

If you want to be able to transmit on the extended freq area then do the following mod....
  1. Remove the front cover of the radio
  2. Locate the ic chip in the lower right hand corner.
  3. Find the 2 diodes number d32 and d33 (they should be the top two on the right side of the ic chip, also they have ben cut beforenand (re-soldered)
  4. Un-solder the two diodes (breaking their connection).
  5. Replace the front ctver.
  6. Re-install the battery and turn the unit on, then push the reset button on the back.
The tr-2600a should now be reprogramed and it should also transmit anywhere it will recieve...

I forgot to add that d32 and d33 on the recieve board (but that is what is under the front cover).

Jim - KD0PJ


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