Hey guys,
I was wondering if someone could help me troubleshoot this mic mod I'm working on, swapping out the circuit board on a Sterling ST-55 with a microphoneparts 84-55 circuit.
The build went pretty well - I accidentally singed a cap pretty bad my first go around, so originally only the HPF channel was working, but I swapped it out. I plugged it into a 48v preamp and the mic was sounding great - low noise, great signal, obvious improvement from the original. But then after 30 seconds or so the signal started waning, and then became intermittent. (The same had happened my first time around, except only with the HPF signal.) DC voltages across the board are within range of what they should be.
My first thought was that there could be some problem with the capsule. I carefully re-flowed the connections to the capsule at the very least, to try to rule out any weakness there. It didn't help.
Does this ring any bells for anyone?
Thank you!
I was wondering if someone could help me troubleshoot this mic mod I'm working on, swapping out the circuit board on a Sterling ST-55 with a microphoneparts 84-55 circuit.
The build went pretty well - I accidentally singed a cap pretty bad my first go around, so originally only the HPF channel was working, but I swapped it out. I plugged it into a 48v preamp and the mic was sounding great - low noise, great signal, obvious improvement from the original. But then after 30 seconds or so the signal started waning, and then became intermittent. (The same had happened my first time around, except only with the HPF signal.) DC voltages across the board are within range of what they should be.
My first thought was that there could be some problem with the capsule. I carefully re-flowed the connections to the capsule at the very least, to try to rule out any weakness there. It didn't help.
Does this ring any bells for anyone?
Thank you!