All the 6550 talk, question for Peter

  • Thread starter Thread starter cml694
  • Start date Start date
racerevlon":20jzd03v said:
Cool--thanks for the tips... does anyone ACTUALLY know what the other trim pot on the other side of the PCB does? I've received one hazing-style comment, but I'd really like to know what it does.

Cheers,
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I believe it has to do with helping to control the noise of the amp.
 
Like V said it controls the hum. The heaters require a resistance above ground to work properly and quietly.
The hum trimmer is a 100 Ohm pot that allows you to get the circuit quiet by having the perfect amount
of resistance to prevent noise. Usually around 50 Ohm or half way is perfect but the pot allows you to use
your ears to make sure it's perfect.
 
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