Re: Mic doesn't work in bitx40 #bitx40


Thank you for your reply..
So the one that I bought is the electret condenser mic. 
When I didn't connect the mic to the circuit the voltage from 4.7KOhm resistor is about 9.5-10Volt. But when I connect it to the mic, the voltage suddenly drop to the 0.131-0.135Volt. 

And the 1uF polar capacitor, also behaving weird. The positive side is show the same exactly voltage with the output from 4.7KOhm resistor. But the negative side always show 1.4Volt, even when the mic is connected or not.

Please help me. Thank you

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