[TenTec] 705 Electret Mic question

[MadScientist]

The battery provides bias for the electret.

Gary


> On Jan 16, 2018, at 5:23 PM, Joe Hill <n4zoojoe at gmail.com> wrote:
> 
> My 705 Ten Tec microphone takes a 9v battery in the base.  What is this for?
> Thanks and 73,
> Joe
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