6SN7 Plate Voltage

it's 450v

Yes, 450 is correct

Yes, 450 volt maximum and 5.0 watts per section (6SN7GTA/GTB).

For future reference....

6SN7GT/WGT/WGTA - 300 volt maximum and 3.5 watts per section

5692/6SN7 - 275 volt maximum and 1.75 watts per section.

Sugarbrie -

Actually the 275 rating only applies to 5692 I think - I've never seen a 6SN7 without GT or something (W, A, etc.) on the tube. GT really just specs' the bottle shape so all 6SN7s are GT's in general. (e.g. T-9 Envelope, octal base). Also I think WGTA = GTA = 450V...

not sure as I have never pushed them that hard... and not to be nitpicky, but everything on the net lives for ever... so, accuracy is the goal.

thanks
-Ed
(who has way too many 6SN7GT's and needs to unload some soon).

Ed, that is what I am saying. I only put the 6SN7 after the 5692 to denote it as a "6SN7 type" of tube. I did not mean to say there are 275 volt tubes that say 6SN7 on them. Yes there are only 275 volt 5692's...Sorry for any confusion.

I think you are right that the WGTA should be 450 volt. The W denotes a military version of the GTA (and WGT is a 300 volt military GT). My mistake.