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Old 13th Sep 2018, 10:23 pm   #3
Herald1360
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Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,528
Default Re: Telephone style microphone ID req

Well, that's a NATO stock number on the back- might lead somewhere.

Poke it with a DMM and see if it's resistive. If it is, it'll be dynamic, if it's open circuit, probably crystal. Either way it should click when prodded.

Can you look at it with a 'scope?
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