2. tech-talk
  3. 1175369160

Tube issues Mumbo jumbo?

Hello

I am trying to decipher the jargon associated with some tube data sheets as the info applies to one tube and it’s closest variants.

Namely the 6SN7 – 5692, primarily so the appropriate replacement can be selected for a BAT VK 60.

The problem I think stems from info BAT provided me regarding initial start up and biasing process the amp does all by itself. Their recommendation is to use those tubes which are rated at 600v plate voltages. The 600v is applied only during this startup process, and for only a minute or two or at some point during it.

Perhaps I’m missing something somewhere and it wouldn’t be the first time either… but I can find no 6SN7, 6SN7GT, 6SN7GTA, 6SN7GTB, OR 5692 with 600v plate voltage specs. Using Duncan tube data sheet, Vacuum tube Museum, and a couple other spots I don’t recall the names of… none show that high a level Va capacity. I did see one type listed at 450 Va… but I've seen none showing a 600va ability.

Is there such a thing? I’m figuring at least the sovtek 6SN7 that BAT supplied with the amp possess such a rating, yet I see no info that supports it as 600v either.

What’s going on?
blindjim

Showing 1 response by blindjim

blindjim OP
3,092 posts
 
Jeffreybehr Well thanks a bunch especially for the review.

the idea about the 600v was told to me over the phone by a BAT tech when I was inquiring about tubes and their cost fi retubed using all BAT tubes. $490, plus ship BTW.

I specificially made mention of the 6sn7 not the output tubes... but ya know, the tech may just have mixed up the two come to think of it.

that sure is a dramatic price diff from $150 to $40. Per pair? ...or each?
More to discover