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Pull the 6F6 audio output tube and see if the voltage still drops. If it does, check C5 (.05). Make you check quickly (seconds) as with a voltage drop of 216 volts across the speaker field coil, it is drawing over 170 milliamps and won't last long. That is why it is getting hot.
Last edited by Chimes; 04-16-2009 at 12:37 AM.
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