Sorry, have never heard of a tube amp causing this issue. I’d say it is more likely a major build up of static electricity at the turntable platter. Maybe try zapping it with a zerostat. Is turntable grounded properly? What mat are you using? Felt can add lots of static. A leather mat works wonders...also the cleaning of a record while on a spinning platter can add lots of static, especially If using something like the old discwasher d4 system. The audioquest carbon fiber record brush seems to work well.
