Volume imbalance and high voltage in one channel

[Paul Birkeland]

Please pull the 6080 and recheck the voltages on 1-5.

To reiterate, you must get 60-90 volts on terminals 1 and 5 and roughly 200V on 2 and 4 before going back to run the 6080.  Until you can pass this check, please do not run the amp with the 6080.

-PB

 

[antjuneau]

Please pull the 6080 and recheck the voltages on 1-5.

To reiterate, you must get 60-90 volts on terminals 1 and 5 and roughly 200V on 2 and 4 before going back to run the 6080.  Until you can pass this check, please do not run the amp with the 6080.

-PB

Is this true even with the bad MJE350? I'm getting:

1 - 80
2 - 198
4 - 198
5 - 173

 

[Paul Birkeland]

So when we first did this test, terminal 5 gave you the voltage you were looking for and terminal 5 did not.  Now, terminal 1 is correct and terminal 5 is not.

Completely ignoring the 6080 and the big PC board, what else has changed in the amplifier that could have precipitated this change?