Dynamic Microphone For Bitx

Lately I have been using a Dynamic microphone for Bitx3B as shown in pictures below.The audio seems to be quite good with it.

One important part that has to be installed in line of microphone is a 3.3uf  Tantalum capacitor, to block the positive 12 volts TX voltage.

Q15 which is 2n3904 in the mic pre amp stage can be changed to  BC549 which is a  low noise VERSION, 
The gain seems to be better then 2n3904 and much better audio quality, it has to mounted in reverse.