second series punch75 (pre-HD) trim pots - diyAudio
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Old 5th September 2006, 12:43 PM   #1
Clipped is offline Clipped  Thailand
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Default second series punch75 (pre-HD) trim pots

what in the world are those trim pots for inside the amp and how are you suposed to adjust them?

i got itchy and turned one to see what would happen , the next thing i saw was magic smoke
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Old 5th September 2006, 06:11 PM   #2
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If they're like the ones in the attached image, they are the bias pots. They set the idle current for the amplifier.
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File Type: jpg punch45biaspots.jpg (83.3 KB, 57 views)
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Old 21st March 2010, 12:44 AM   #3
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It's the smoke screw.
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