2. amps-preamps
  3. 1363897143

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
islandmandan

Showing 2 responses by islandmandan

islandmandan OP
1,260 posts
 
That's exactly what I needed to hear, thank you Brownsfan! Got a new one on the way, hopefully, that will do it.

Best regards,
Dan
islandmandan OP
1,260 posts
 
Thanks for the responses. All tube are firmly seated in their sockets. (This is not my first tube amp, nor is it the only one I have currently).

The tube in question is a Russian Tung-Sol. Only the top glows faintly. I have purchased all new tubes for the amp, as I believe the tubes are the original ones that came with the amp. The new 6SN7 and 6BX7's are on their way from Andy Bowman at Vintage Tube Services.

The 6SN7 would be hard to tell from a new one, it looks perfect. I'm hoping this will solve the output problem, but now, I'm having my doubts.

I guess I'll just have wait and hope.

Thanks much, regards,
Dan
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