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Hallicrafters S120 hum at no vol and hum with volume
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08-12-2017, 09:44 PM
old_coot88
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Join Date: Sep 2009
Posts: 2,561
Dude, just to reiterate, check the heater wiring to verify that the 1st audio tube's heater is at the bottom (ground) end of the string. If it's not, it
could
be introducing hum downstream of the vol. control
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