[TenTec] 705 Electret Mic question

[Bernie Skoch]

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 at comcast.net> wrote:
> 
> 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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