Quote:
Originally Posted by ms660
Is it the loud hum there when the volume controls are turned to minimum ?
Lawrence.
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Both... popping sound and hum is there when the volume control is down, but when I start to turn up the hum gets even higher and louder and then a massive squealing starts...
I have several 6v6s and tried a few, all are having the same effect
I do not have another 6SC7 I am unsure on that
the 6SJ7s i have one extra so started swap them one by one, no change and I have none of the rest of the 6SA or 6SF tubes..
I was reading the robribinette site for trouble shooting but with these sounds, and those repeating popping (is that the osculation?) and squealing can be anything...
I am also really suspicious of the on/off switch pot.. the pot responds weirdly...
thinking of where should I start...
cleaning the tube sockets
check again the soldering? poking around with a chopstick?
ground connections... on the chassis counted 5 ground points in total
getting better filter caps?
Thanks Lawrence