Electronics > Beginners
Microphone Circuit troubleshooting?
Rango:
I googled schematic for M-Audio Nova and Sterling ST-51 as it's same circuit to no luck. Guy from Cali wouldn't share it due to affiliation.
Not sure where you guys get your schematics from but google was a miss.
http://recordinghacks.com/microphones/Sterling/ST51
Gregg:
Hard to say, but the solder joint on the longer leg of R4 looks dodgy. I would start by resoldering (with good flux and leaded solder) all joints that look suspicious and give the board a good cleaning.
konohimawm:
Cardioid Condenser Microphone need highly regulated power source. It's critical. I think first you should check your power source.
Afterwards you should check capacitors and diodes on board.
Rango:
--- Quote from: konohimawm on January 08, 2020, 03:39:05 pm ---Cardioid Condenser Microphone need highly regulated power source. It's critical. I think first you should check your power source.
Afterwards you should check capacitors and diodes on board.
--- End quote ---
I have audio interface umc202hd with phantom power 48v and it's on. Do you or any mic expert know what is the function of that gold/copper plating on the capsule itself, right by the crew?
The plating itself is missing and it looks like it was there as i see under magnification lamp traces of that plating by the screw but 98% of it it's gone. I wonder maybe that is why this mic it sounds bad? It's working but sounds so bad that its basically unusable.
I googled capsules and they have that plating by my mic does not, at least not in any significant amount.
Thanks guys for the help.
From aliexpress, cheap k87/k47 capsule
Shock:
--- Quote from: Rango on January 10, 2020, 11:23:33 pm ---Do you or any mic expert know what is the function of that gold/copper plating on the capsule itself, right by the crew?
The plating itself is missing and it looks like it was there as i see under magnification lamp traces of that plating by the screw but 98% of it it's gone. I wonder maybe that is why this mic it sounds bad? It's working but sounds so bad that its basically unusable.
--- End quote ---
If that was the diaphragm then yes it looks completely missing. It's hard to tell in your washed out photo if that was the front or the back. Different models mount the wires either front, back or on the side. But if those screws are on the front, it needs a diaphragm there or it won't work at all. What is on the back, is it just a plate?
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