If there are separate tubes for the two channels, checking that off the troubleshooting list is as easy as swapping the tubes. If the circuit uses one triode of each tube for each channel, you'll need to try replacing each tube w a known good. FWIW, it sounds to me like an intermittent electrical connection somewhere. Ground or signal.
Turntable issue
I haven't had much luck finding an answer to this question so hopefully it's not something that's been asked a thousand times.
Yesterday I turn my preamp on, place a record on the player and I can hear every touch of the tonearm I make. It clicks when lifting it out of its resting position and when I screw or unscrew the record clamp this at is also very audible through my speakers. Also I'm now hearing a hum that was never present before.
I understand that the cartridge picks up vibrations and turns them to sound but this has never been something that was clearly audible before. I'v never heard siuns coming from my speakers when screwing the clamp on our off.
Thanks for any responses.
MMF 5.1SE
Project Tube Box S
Yesterday I turn my preamp on, place a record on the player and I can hear every touch of the tonearm I make. It clicks when lifting it out of its resting position and when I screw or unscrew the record clamp this at is also very audible through my speakers. Also I'm now hearing a hum that was never present before.
I understand that the cartridge picks up vibrations and turns them to sound but this has never been something that was clearly audible before. I'v never heard siuns coming from my speakers when screwing the clamp on our off.
Thanks for any responses.
MMF 5.1SE
Project Tube Box S