Joe Malone wrote:htm wrote:Hi Joe
I've been happily using my four BA's on drums and guitars for a good while, but I 've noticed that there's something going on with one of them. The gain on one is some 4 dB lower than others and it's not giving out the full 48V phantom power, only 15 or so volts comes out. I checked the wiring, but can't locate the problem there. Is there something on the board, that I should check?
Check 10R resistor is still 10R ?
Voltage you get on either side of the 10R measured to 0v?
Voltages at opamp pins measured to 0v?
Voltages at +/-in measurted to 0v with phantom on and no mic plugged in?
Ok, here goes
10R is 10R
47.3 on the opamp side of 10R and 47.5 on the other side
opamp pins are
both ins 23.6
+/- in are 15.5/15.0