Need mic pinout for Relm SM series

Forum dedicated to discussion on RELM/Regency/Wilson Radio products
Post Reply
User avatar
n_zero_ndp
Posts: 388
Joined: Sun Feb 24, 2002 8:10 pm
Location: EDACS-land

Need mic pinout for Relm SM series

Post by n_zero_ndp » Fri Apr 24, 2009 4:50 pm

Looking for the Relm Micro-Com SM series radio mic pinout.

Trying to help a vol fire guy with a bad mic - I'd rather throw the radio away where it belongs (in the dumpster)
but I guess that's not an option......

I think I have it close, but I would rather verify with someone who knows for sure......
The EDACS Dork......

Two way repair man
Posts: 83
Joined: Mon Apr 05, 2004 12:36 pm
Location: Melbourne, FL

Re: Need mic pinout for Relm SM series

Post by Two way repair man » Mon May 04, 2009 7:01 pm

The microphone pin outs for the older SM-series mobiles are as follows:

Pin 1 = RX earpiece audio (not connected)
Pin 2 = Ground
Pin 3 = PTT (+5vdc in RX, 0vdc in TX)
Pin 4 = Microphone Audio (low impedance)
Pin 5 = Hang up (+5vdc off hook, 0vdc on hook)
Pin 6 = Switched +13vdc (Not connected)

I hope that helps.

Regards,

Bill

User avatar
n_zero_ndp
Posts: 388
Joined: Sun Feb 24, 2002 8:10 pm
Location: EDACS-land

Re: Need mic pinout for Relm SM series

Post by n_zero_ndp » Mon May 04, 2009 9:46 pm

That's what I was looking for...

Many thanks!
The EDACS Dork......

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest