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G6Tanuki · 6th Mar 2021, 3:30 pm

Microphone looks like it might be a carbon-granule type; try measuring its resistance with something like an AVO - expect to see a few hundred Ohms, which may vary if you shake it or shout into it.

6th Mar 2021, 3:30 pm	#4
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 13,998	Re: Identifying unknown items Microphone looks like it might be a carbon-granule type; try measuring its resistance with something like an AVO - expect to see a few hundred Ohms, which may vary if you shake it or shout into it.