Hoping someone can help me begin troubleshooting here. I have a Cornet2 between a MM cartridge (2.5mv, I think) and a flea watt SET amp. I noticed a week or two ago that there was a 60 Hz hum in both channels. Only noticeable if I turned way up, so I didn't mind too much. Today, though, I suddenly get very, very low volume playing records. Maybe 20-30% volume? The amp is fine - tested with my DAC - and I'm assuming for now that the turntable doesn't have anything funky going on. The sound is perfectly clear, and uniform in both channels, so I don't think I have a bad cable.
I don't necessarily expect anyone to say "Oh, yes! This specific thing!" but with the collective genius here, I'm hoping for suggestions on where to start investigating. I have a soldering iron and DVM at the ready! No tube tester, though...