This amps pissing me off so much, I haven't had it working properly for weeks/months now. It emits sound ok, I don't have any master volume or power scaling yet though so I'm playing clean. The worst thing about this situation is when something goes wrong with this amp I usually know what it is, but I'm having a hard time figuring this one out.
Problem 1:
When Channel I is on 0, there's still sound coming out, it's like when you turn up the volume slightly. It's thin/weak but it's very audible. It works pretty much normally besides that, the sound comes on properly about 1-2. I've removed Channel II and that hasn't helped at all. I think the volume pot might be broken, but on 0 the two sides seem to measure correct resistance. However, when it's on 10, one side is 0K and the other is 470k? (It's a 1M pot).
Problem 2:
Theres more hum than there should be, it's like the sound single coils have when you turn on the TV. However, turning the volumes off doesn't get rid of the hum. Messing with the tone controls doesn't get rid of the hum.
Problem 3:
Every minute or so there's this rustling sound, and whenever I turn on the fan in my room theres a very loud pop. There's also a loud pop when turning off the standby switch.
I just fired the amp up without the headbox, and turned off the lights. I can't see any arcing at all when it makes the popping/rustling sounds (which can be provoked by hitting the amp). Not surprisingly, the hum gets worse the brighter I turn the dimmer switch in my room.
Any ideas as to what the causes might be? I replaced the two can caps with lumps in with F&T caps a few weeks ago when the amp first started having problems (horrible blocking distortion), but I've still got some of the old Ruby caps there. I can't see anything wrong with those. Now that my PPIMV pot isn't working anymore (values have drifted, pot's probably fried so I removed it and rebiased), I can only play the amp clean but even then there's still these problems. :dammit:
Problem 1:
When Channel I is on 0, there's still sound coming out, it's like when you turn up the volume slightly. It's thin/weak but it's very audible. It works pretty much normally besides that, the sound comes on properly about 1-2. I've removed Channel II and that hasn't helped at all. I think the volume pot might be broken, but on 0 the two sides seem to measure correct resistance. However, when it's on 10, one side is 0K and the other is 470k? (It's a 1M pot).
Problem 2:
Theres more hum than there should be, it's like the sound single coils have when you turn on the TV. However, turning the volumes off doesn't get rid of the hum. Messing with the tone controls doesn't get rid of the hum.
Problem 3:
Every minute or so there's this rustling sound, and whenever I turn on the fan in my room theres a very loud pop. There's also a loud pop when turning off the standby switch.
I just fired the amp up without the headbox, and turned off the lights. I can't see any arcing at all when it makes the popping/rustling sounds (which can be provoked by hitting the amp). Not surprisingly, the hum gets worse the brighter I turn the dimmer switch in my room.
Any ideas as to what the causes might be? I replaced the two can caps with lumps in with F&T caps a few weeks ago when the amp first started having problems (horrible blocking distortion), but I've still got some of the old Ruby caps there. I can't see anything wrong with those. Now that my PPIMV pot isn't working anymore (values have drifted, pot's probably fried so I removed it and rebiased), I can only play the amp clean but even then there's still these problems. :dammit:
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