What's a properly lit 6SN7 tube look like?


I just purchased an SET 300B amp here on the 'Gon, and after a bit of light cleaning of pins and sockets, etc; I fired it up.

All the tubes light up, but the single 6SN7 tube only lights at the top, while the 6BX7's light top and bottom. I get no sound out of the amp, with the exception of a very weak sound (music from the source) in the R/channel, with the preamp turned all the way up.

Any help would be greatly appreciated!

Thanks,
Dan
Ag insider logo xs@2xislandmandan

Showing 1 response by geoffkait

Make sure the tubes are all seated correctly, you might have to wiggle them a bit in their sockets until you're getting both channels. 6SN7s, I have three of them, may light up very faintly, and in a lighted room you can just barely see they're on.