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Re: Help with troubleshooting Bitx40 - no transmit. #bitx40help

 

Neris Biciunas

Some microphones have a set of normally open contacts for activating the PTT circuitry.
Others use current drawn by the microphone to trigger current sensing circuitry inside
the radio to activate the PTT function.?

If using the current sensing circuitry type microphone, it should be possible to build that
circuitry into your radio, or maybe inside the microphone itself.?

Arv? K7HKL
_._


On Wed, Dec 20, 2017 at 2:07 PM, Neris Biciunas <nbiciunas@...> wrote:
And one more question:
I have read some comments about different "kinds" of ground for the mic vs PTT switch - What is that all about?? Do I need to connect ground leads to different "grounds"?


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