A small addendum:

if it is a carbon microphone, then you would need attenuation, rather than
amplification. I recall they had been used in old phones, w/o any active
element. With transformer they were capable to deal with approx. 100 km
with good wiring.

Regards,
Imre


On Tue, 16 Sep 2003, Howard Winter wrote:

> Bob,
>
> On Mon, 15 Sep 2003 10:10:57 -0500, THE NELSONS wrote:
>
> > Does any one here have any idea what it would take to
> hook the MIC from
> > a military headset  upto the microphone  input of a
> computer.
>
> Rather depends what you mean by "military" - most (old)
> UK military headsets that I've seen (typically used by
> ATC) have carbon-granule microphones, like old telephone
> handsets, so you'd need some sort of amplifier to use
> with a "normal" audio input.  They work by the carbon
> varying its resistance as sound waves compress and
> release it, so you need to pass a voltage through to
> "read" the resistance.  That's the limit of my
> knowledge, I'm afraid, so I can't help further than that
> - sorry!
>
> Howard Winter
> St.Albans, England
>
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