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| | |-+  No output from power amp section		 « previous next »
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Author Topic: No output from power amp section  (Read 3729 times)
johnjgormley
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« on: March 30, 2010, 12:12:10 AM »
Just finished my DC30. Light comes on, Tubes glow. No sound. If I input a signal to the input jacks I get signal out going in to the power tubes (pin2).  I have VERY high plate voltages on my power tubes. (pin 3 is 67 volts, pins 7 & 8 are about 870 Volts. I checked the windings in the output transformer. I've triple checked my wiring and cant find anything wrong. Suggestions???
Thanks
John
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johnjgormley
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« Reply #1 on: March 30, 2010, 03:13:53 AM »
Whoops. I was on AC volts. Switched to DC. Now voltages are within tolerance. Still no output.
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johnjgormley
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« Reply #2 on: March 31, 2010, 12:37:10 AM »
Got it. Forgot that little jumper across the middle pair of contacts on the Hi/Low power switch.  Duh!
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