I'm working on a Dynaco SCA-80 and there is no bias in one channel. The other channel has about 40-50mV across the emitter resistor.
I've tried a different set of outputs, and swapped the drivers from the other channel but no change. Last time I looked at it I checked most of the resistors and they seemed good.
I'm not sure if something is wrong or if something is just a bit off spec. If the later, I could modify this amp to have an adjustable bias? What is my best option/course of troubleshooting?
I should also mention it shows 10-15mV bias when I power it on then it quickly goes to 0.
I've tried a different set of outputs, and swapped the drivers from the other channel but no change. Last time I looked at it I checked most of the resistors and they seemed good.
I'm not sure if something is wrong or if something is just a bit off spec. If the later, I could modify this amp to have an adjustable bias? What is my best option/course of troubleshooting?
I should also mention it shows 10-15mV bias when I power it on then it quickly goes to 0.
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