I have a handset, identical to a regular telephone handset. It has one
of those carbon electret microphones in it. I cannot get any sort of
signal on my scope when I holler in the mic. I am used to the active
mics, like the two pin device that takes a 1K pullup to power it. Does
anyone know what sort of amplifier is necessary? Impedance of the mic
element? Gain that is necessary?

Thanks all
Chris~

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