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1970 Marshall SL 1959

6/15/2000 9:42 PM
Dixieman	1970 Marshall SL 1959 OK guys I appreciate all the responses to my original post - Thanks! Now that I've returned every thing to the original configuration, I've come across a major problem. After installing new pre & pwr amp tubes and biasing the tubes, this problem arose!!! With everything appearing normal and the amp plugged into a 1960 slant cab, anytime an input signal is applied I get what appears to be a line level signal out of the speakers and the power tubes glow bright orange!!!!! Has anyone seen the symptoms before????? What about fix!!!! Help!!!!

6/15/2000 9:42 PM

Dixieman

1970 Marshall SL 1959

OK guys I appreciate all the responses to my original post - Thanks!
Now that I've returned every thing to the original configuration, I've come across a major problem. After installing new pre & pwr amp tubes and biasing the tubes, this problem arose!!! With everything appearing normal and the amp plugged into a 1960 slant cab, anytime an input signal is applied I get what appears to be a line level signal out of the speakers and the power tubes glow bright orange!!!!! Has anyone seen the symptoms before????? What about fix!!!! Help!!!!

Replies:

Peter S Most likely the amp is oscillating ... -- 6/15/2000 10:28 PM