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Super Lead

12/19/2005 3:53 PM
Super Lead
My 74 super lead is showing low plate voltages. The EL34's are around 240 volts. Any ideas?
12/20/2005 5:49 PM
Rick Erickson

Sounds like you may be hooked up to the wrong transformer primary tap. Check your heater voltage and verify that it's 6.3VAC or thereabouts.  
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12/20/2005 9:08 PM

Which wire should be hooked upto the AC the red?
12/21/2005 7:58 PM

Figured it out. Whoever "worked" on this amp before didn't have the power supply filter cap hooked up properly. Now it's where it shold be 440VDC @ the plates.
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