Joe,
If the mic isn't wired for drawing power from the rig. the battery powers the
mic.
http://www.qsl.net/g4wpw/tentec705microphone.pdf
73,
Bernie
> On Jan 16, 2018, at 18:24, MadScientist <dukeshifi@comcast.net> wrote:
>
> The battery provides bias for the electret.
>
> Gary
>
>
>> On Jan 16, 2018, at 5:23 PM, Joe Hill <n4zoojoe@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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>
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