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What has the gold and silver got to do with the "polarity"?
Surely it is the way it is wired, not the colour of the terminals.
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I would replace the driver/clipper transistors otherwise one side won't switch off properly. They are likely to be damaged saving the IRS20957 (that was probably...
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It is highly unlikely to be the output transistors.
Have you got similar noise coming out of J2, (Effects send socket)?
If you have the noise...
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If the transformer had shorted turns it would run hot....
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For 120v see diagramme.
The TDA requires around +-25volts DC ...
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It is probably oscillating at HF.
Check your layout and add a 22k grid stopper resistor to each grid pins 2 & 7. Mount the 22k on the solder bucket...
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This amplifier uses a transformer to connect to the speakers. Never use it without a speaker connected as the back EMF from the transformer can damage the...
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I would look at the effects in/out or sometimes called, Power Amp in socket for tarnished contacts.
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A red LED is a red LED.
Yours is rated at 200mW and being red has a standard voltage drop.
https://www.planeparts360.com/nsn/rfq/refac-electr...
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Pleased you found it.
Lovelly Old School amplifiers. Dead basic but work well.
Pleased to help.
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2N3055s will supply up to 70Watts of power, any more and they will destroy themselves. Your measurements are probably peak to peak.
The schematic will...
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