RuudNL
Well-known member
This week we got a couple of Joemeek JM27 microphones in.
Capsules are not too bad, but the microphones are noisy as h*ll...
Very simple electronics, single FET and a small (transistor radio?) 2:1 transformer.
Polarisation voltage was low, only 30 V or so.
So we removed the original PCB and created a new circuit, with a DC/DC converter for the polarisation voltage.
The result: a very quiet microphone with a higher output.
In fact the microphones are usable now!
Capsules are not too bad, but the microphones are noisy as h*ll...
Very simple electronics, single FET and a small (transistor radio?) 2:1 transformer.
Polarisation voltage was low, only 30 V or so.
So we removed the original PCB and created a new circuit, with a DC/DC converter for the polarisation voltage.
The result: a very quiet microphone with a higher output.
In fact the microphones are usable now!