[Milsurplus] SIMPLE Carbon Microphone Substitute.

[hwhall at compuserve.com]

OK, I know the ones you meant. Reminds me of Broderick Crawford and "Highway Patrol" TV show.


 Wayne

 

-----Original Message-----
From: Dave Jackson <cjack93907 at razzolink.com>
To: hwhall <hwhall at compuserve.com>; milsurplus <milsurplus at mailman.qth.net>
Sent: Sat, May 28, 2016 6:35 pm
Subject: RE: [Milsurplus] SIMPLE Carbon Microphone Substitute.



Wayne:
 
The ones I’m think about are from the Motrac mobile units and later series .  Do a search for “Motorola Motrac microphone” and you will see several.  They usually had the round 4 pin Amphenol connector although there are some different connectors.  They first came with case metal cases and changed over to plastic.  (I used to work on way radios for the various police and fire departments.  The deputies were disappointed with the plastic cased microphone because they couldn’t whack an unruly suspect and knock him out (or at least get his attention!)
 
The original carbon mics were cast metal and used from about mid-1930s until the Motrac series came out in the 60s.  They are the ones you see in the old police movies from the 30s, 40s and 50s and were used with practically every mobile configuration.
 
The “portable” radios used different microphones and I don’t remember if they were carbon or dynamic.  They likely were because they used the standard 4 pin mic connector and I doubt Motorola would use a configuration the operator could inadvertently grab the wrong mic and put a radio out of commission.
 
At any rate, it is worth a try as they are plentiful and cheap. You  can find boxes full of them at most Ham Fests.   All that could happen is that it wouldn’t work.
 
(p.s.:  The GE microphones were dynamic mics and won’t work.  The key way is offset between the Motorola and GE mics to prevent the operator from using the wrong mic)
 
Dave, WA4OBJ



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