[Kenwood] Assistance needed with microphone connections

[Clif Holland]

The pin-outs for the mikes are on the Kenwood website. The PTT line is by 
itself if that is what you are asking, it's not real clear...

Clif Holland, KA5IPF
www.avvid.com


----- Original Message ----- 
From: "Mike Clarson" <mclarson at rcc.com>
To: <kenwood at mailman.qth.net>
Sent: Monday, October 04, 2004 2:41 PM
Subject: [Kenwood] Assistance needed with microphone connections


> Perhaps someone on the list can assist. I seem to have misplaced may 
> manual
> for a TM-455A/E (Similar to a TM-255A/E). This unit uses an 8 pin modular
> connector for the microphone, and the stock mic (has no number on it) is 
> one
> with DTMF pad, PTT. up-down buttons and four function buttons. I am 
> hooking
> up a headset, and need some info. Web searches provided pinouts, but I 
> need
> to know if the PTT is part of the MIC circuit (2 wires for PTT and MIC
> audio, like many portables) or if PTT is independent of the mic audio (3 
> or
> 4 wires for PTT and Audio, like a TS-830)? Also, is the power for the
> electret on the audio lead from the radio or is it derived in the 
> microphone
> from the 8V lead?
>
> My guess is PTT is separate and MIC voltage is derived off the 8V line and
> NOT fed down the audio line. Can someone confirm? Thanks. --Mike, WV2ZOW
>
> _______________________________________________
> Kenwood mailing list
> Kenwood at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/kenwood
> Help: http://mailman.qth.net/subscribers.htm