I've mostly seen 4mv across the bias headers but I think that's too high. I generally set it to where it just starts to increase the idle current like this:
http://www.bcae1.com/temp/ausettingbias.swf
http://www.bcae1.com/temp/ausettingbias.swf
I tested the 47k resistors, they are ok.
All trim potentiometer now works, but I have another problem.
If I move the two driver boards in the picture slightly, the BIAS goes up and down. Same problem with both boards.
The other two work fine.
I thought the pin header has bad connection to the circuit board. I resoldered everything but the problem persists. Sometimes the LED's dont light up when I move the board too.
I think I have no choice but to lay patch cables?
Do you have another idea?
Best regards.
All trim potentiometer now works, but I have another problem.
If I move the two driver boards in the picture slightly, the BIAS goes up and down. Same problem with both boards.
The other two work fine.
I thought the pin header has bad connection to the circuit board. I resoldered everything but the problem persists. Sometimes the LED's dont light up when I move the board too.
I think I have no choice but to lay patch cables?
Do you have another idea?
Best regards.
An externally hosted image should be here but it was not working when we last tested it.
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