[ARC5] Carbon mic replacements

[Dennis DuValll]

Hmmm….   Maybe.

DD

***************
> On Mar 25, 2016, at 9:08 AM, Scott Robinson <spr at earthlink.net> wrote:
> 
> OD paint...?
> 
> /scott
> 
> On 3/25/16 8:55 AM, Dennis DuValll via ARC5 wrote:
>> Yes, the Motorola and other microphones mentioned work very well.  But
>> they don’t look military….  :^(
>> 
>> Dennis D.  W7QHO
>> Glendale, CA
>> 
>> ****************
>> 
>> 
>>> On Mar 25, 2016, at 8:17 AM, Robert Nickels <ranickel at comcast.net <mailto:ranickel at comcast.net>
>>> <mailto:ranickel at comcast.net <mailto:ranickel at comcast.net>>> wrote:
>>> 
>>> I'm surprised it hasn't been mentioned that for many years, Motorola
>>> and GE (and probably other) two-way FM radios used a controlled
>>> reluctance mic element with an integral transistor impedance matching
>>> stage to make it directly usable with a carbon mic input. You can
>>> probably noodle around the Repeater Builder site and find some model
>>> numbers but IIRC mics with both metal and plastic housings used this
>>> design, and they key is they all had the 4-pin connector, not the
>>> modular type, similar to the one shown opened-up here, although most
>>> are the driftwood (beige) color scheme:
>>> 
>>> http://forums.radioreference.com/motorola-forum/262809-help-needed-identifying-vintage-remote-microphone.html
>>> 
>>> The GE Progress Line was similar although the the electronics was
>>> packaged differently.  The element inside has characteristics similar
>>> to the famous Shure 444 and I've modified some of them for use as a
>>> regular hand mic with the characteristics of the 444. GE:
>>> http://i.imgur.com/Vke2oJS.jpg
>>> 
>>> The nice thing is, these mics are usually in the "dollar apiece" boxes
>>> at hamfests.   Shure, Turner, and others also supplied their standard
>>> hand mics with carbon elements, and virtually any mic you'd find used
>>> with either an aircraft comm radio or an AM marine radio will be a
>>> carbon type.
>>> 
>>> 73, Bob W9RAN
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>> 
>> 
>> 
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