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Old 14th Sep 2018, 2:44 pm   #10
russell_w_b
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Location: Penrith, Cumbria, UK.
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Default Re: Telephone style microphone ID req

Quote:
Originally Posted by GSBX1220 View Post
There is also an electrolytic capacitor in series with it For some reason.
D.C. blocker? It'll be a 'rocking-armature' unit (higher Z than the receiver rocking-armature unit) and stands to be polarised beyond use if there's a constant direct current through it.
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