C1.
check your wiring scheme and transformer placement. I get no excessive dc offset or hum in my build. soundstage is nice and wide, esp with some HD800s. the trick to this guy is the tube rolling capability. you can swap in tons of different tubes to find your flavor....
What tube do you prefer with yours? Mines are 12AU7A
How about subbass quantity?
what do you mean by wiring scheme?
How have you positioned your transformer.. mine is at the far left near power plug..
Its currently unmounted.. do you think this could be the cause
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I opened the box and positioned the transformer outside the box ( should not do any interference there) even then still same humm problems..
also if i have nothing plug but AC power, volume to max. The 2 cables that are connected to the RCA jacks to the front volume on the board are picking a lot of noise by just moving my hand over them.. They are twisted together could this be the cause...
actually at volume to max you hear a lot of garbage even when not moving my hand over them but when moving my hand over its even more garbarges..
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also on cavalli web page he says
The 2 x 3 onboard header can be jumpered to select 12.6V parallel or 6.3V series operation.
what should it be 12.6v or 6.3v mine is currently 12.6v
Anybody have an high res zoom pic of all the parts of their SOHA II amp so that i can compare to make sure the dude did it right
that humm is killing me the guy sold me a defect amp..
I think i found something..
The C16P capacitor has melted a lot because the Q1P transistor was touching it or something... What is the use of those 2? anybody can tell me
and if the melted C16P capacitor could have an effect on all this ****..