Tube DIY Asylum

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RE: oscillating 6550 set amp. long

Posted by Tre' on March 5, 2012 at 10:18:06:
"When I hook up the heaters per spec, I get no sound out of the speakers. The 6550's don't heat up at all."

Are you saying if you hook up the heaters, as shown in the schematic, the heaters don't even light up?

But if you don't ground one side, leaving everything else the same, they do light up?

Tre'