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  Amsterdam View Our Stats   CLICK FOR A FREE DOMAIN NAMES HTTP://WWW.YOURNAME.TK FOR YOUR OWN WEBSITE IF YOU CLICK HERE AND YOU CAN VOTE FOR OUR FREE WEBSITES IN THE TOP 100 LIST  WANT A TOP RANKING ? USE THE ULTIMATE SOFTWARE SUITE FOR WEB SITE PROMOTION  FreeWebSubmissions Submit Your Site To The Web's Top 50 Search Engines For Free THE ALEXA BANNER, THIS BANNER GIVES THE DALLY STATISTICS OF THIS FREE WEB SITE The World of Free Packet Radio Software Amsterdam The World Of Free Packet Radio Software Amsterdam The Netherlands |