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- copied from packet:
- Msg# TSF Size #Rd Date Time From MsgID To
- 38132 BF 4720 0 13-Mar 1600 4X4CV 59967_4X1RU MOD@WW ()
- Subject: KENWWOD MIC MODIFICATION.
-
- The following concerns modificatio of some Kenwood Microphone.
- ===============================================================
-
- Note: What follows is just suggested, proceed at your own risk.
-
- If you have a Kenwood TM-xxxE (European version) trans', Than your mic,
- probably has 1750 Hz baton, Which is useless in some countries (not if
- you are a jammer Hi). This baton can Probably be transformed to have
- another transceiver function.
-
- I myself, tested the above & succeeded with both: TM-241E & TM-741E (of
- which the mic's slightly differ).
-
- -----------------------------------------------------------------------
-
- GENERALLY (at least in the two above) the 1750 Hz baton provides
- aprox' 7.5v (when depressed), in order to generate the tone. While the
- other 3 control baton on the mic provide lower voltage levels (aprox'
- 1.5v & 3.5v if i remember correctly). The idea is simply to disconnect
- the 7.5v at the baton input & to connect the other voltage level (1.5v
- or 3.5, I forgot which).
- To do this follow the next modif' stages.
-
- -----------------------------------------------------------------------
-
- MODIFICATION STAGES:
-
- 1) Disconnect the 7.5 voltage level by cutting the only jumper on the
- print. (to be sure measure 7.5v relative to ground on it, on the 741E
- mic it is symbolized by J1)
-
-
-
- the TM-741E the TM-241E
- ZDDDDDDDDDDDDDDDDDDDDDD? ZDDDDDDDDDDDDDDDDDDDDDD?
- 3 ZDDDDDD? 3 3 ZDDDDDD? 3
- 3 3 ptt 3 3 3 3 ptt 3 3
- 3 3switch3 3 3 3switch3 3
- 3 @DDDDDDY 3 3 @DDDDDDY 3
- 3 DD 3 3 DD 3
- 3 J1 3 3 J3 3
- 3 3 3 3
- 3 3 3 3
- @DDDDDDDDDDDDDDDDDDDDDDY @DDDDDDDDDDDDDDDDDDDDDDY
-
-
- 2) Short the 2 connections on:
-
- the TM-741E the TM-241E
- ZDDDDDDDDDDDDDDDDDDDDDD? ZDDDDDDDDDDDDDDDDDDDDDD?
- 3 ZDDDD? 3 3 ZDD? 3
- 3 3 3 3 3 3 3 3
- 3 3 3 3
- 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
- 3 O O O O 3 3 O O O O 3
- 3 3 3 3 3 3 3 3 3 3 3 3
- 3 3 3 3 3 3 3 3 3 3 3 3
- 3 3 3 3
- 3 1750 VFO MR PF 3 3 1750 VFO MR PF 3
- 3 3 3 3
- 3 3 3 3
- 3Microphone T91-0398-XX3 3Microphone T91-0398-X53
- @DDDDDDDDDDDDDDDDDDDDDDY @DDDDDDDDDDDDDDDDDDDDDDY
- The new function becoms:
- ^ ^
- 3 3
- 3 3
- default:call call
- programable:PF4 ----
-
- ZDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD?
- 3 : [[221100 73 DE Ze'ev 4X4CV @4X1RU.ISR.MDLE 001122[[ : 3
- =============================================================================
- Note: I haven't tried or verified this, proceed at your own risk. WA2ISE
-
-
-
- Copied from the QRZ! Windows Ham Radio CDROM
-
-