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In Reply to: RE: McIntosh C20 Pre-amp Right Channel Buzz posted by Triode_Kingdom on May 21, 2025 at 20:27:20:
Triode, just an update. I have narrowed the issue down to the last pot (the one adjacent to the barrel switch) Specifically the ground tap, on that last pot (which is the right channel where the buzz is) It sort of acts like a cold joint, though I re-flowed it.
If I add just a little pressure to that tap, I can make the hum much more pronounced, It will also produce loud static and popping. It will improve a bit with pressure, but that low level buzz is the best it will perform. Again the other channel remains perfect.
Here is a little video of it:
https://drive.google.com/file/d/1dpRb_5YGieGAjTc4lSOuN0isjIg1k95U/view?usp=drive_link
Pressing or adding pressure to any of the other lugs on the other pots will not produce or change the noise. The "hot" taps on that last pot might affect the buzz but only in that they will flex the ground tap I believe.
I guess I have a defective pot, though it's new?
I did send a message to the supplier "HiFi Audio" in NYC to see if they have any insights or have had other reports of this.
Jeff
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- RE: McIntosh C20 Pre-amp Right Channel Buzz - mr9iron 23:04:21 06/01/25 (0)
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