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ampage archive
Vintage threads from the first ten years
Newbie: hum problem
 3/13/1999 2:53 PM |
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Giacomo | Newbie: hum problem My Fender SuperTwin is humming loud. Tubes are old. Hum is not affected by volume controls. Hum goes away by turning all clockwise the "output tube matching" pot (I'm not a tech but I suppose that such a setting is not the best). Is the hum caused by lost bias? I will go to change all six 6L6GC output tubes but I am a bit worried about biasing them because it seems to me that I can only "balance" the bias not really set it. Replacing the tubes will resolve the hum problem? Helps and suggestions will be very appreciated. Giacomo |
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| Charles Two things happen on those amps. |