post #1111 of 2213
5/4/09 at 6:50pm
tomorrow i will try grounding the pot, it gets much worse if i touch the pot...
i think the 8416 will be extremely hard to beat in this amp. even with the very slight hum, the 8416 is sounding superb.
All my amps have isolated pots including the CTH (still uncased). They all had that "hum" noise you describe, that same irritating hum that gets worse when you touch the pot. The wire trick from pot shaft to SG have eliminated all my hum/noise issues (aside from a recent noise I discovered with my SOHA II where it needed a ground loop breaker but that's another story).
My CTH is dead silent regardless of source or volume level, HOWEVER, this is only true if I'm using my 12AU7 tube. I can always hear a different kind of hum simply by swapping the tube with either one of my 6N1Ps (with heater set to 6.3v). The hum is very faint, and does appear to be slightly stronger in the left channel.