5881 SE amp

[Steve Morley]

Artosalo,

According to the data sheet you provided. if I understand it correctly, the 6p3s is rated at 400 volts plate, 300 volts screen grid and the 6p3s-e is rated at 250 volts max plate and screen.

I've been under the impression that the "E" version had higher ratings.

Can anyone chip in with their experiences running the 6P3S-E at voltages higher than 250?

Thanks, S.

 

[vinylkid58]

Can anyone chip in with their experiences running the 6P3S-E at voltages higher than 250?

~475 B+, PP Class AB1, triode strapped. No problems whatsoever. 🙂

jeff

 

[stenak]

Artosalo,

According to the data sheet you provided. if I understand it correctly, the 6p3s is rated at 400 volts plate, 300 volts screen grid and the 6p3s-e is rated at 250 volts max plate and screen.

I've been under the impression that the "E" version had higher ratings.

Can anyone chip in with their experiences running the 6P3S-E at voltages higher than 250?

Thanks, S.

Thanks Artosalo. So the "E" version will last longer, but do not like voltages higher than 250? So I can move up to nearly 400v on the plate!

 

[artosalo]

I have also used 6P3S-E at 450 V in UL PP with no problem at all. I know several 6P3S-E amplifiers I have built more than 10 years ago
and those all are still running with original tubes.

 

[jcalvarez]

Artosalo,

According to the data sheet you provided. if I understand it correctly, the 6p3s is rated at 400 volts plate, 300 volts screen grid and the 6p3s-e is rated at 250 volts max plate and screen.

I've been under the impression that the "E" version had higher ratings.

Can anyone chip in with their experiences running the 6P3S-E at voltages higher than 250?

410V UL push pull, 20W Pq. They don't break a sweat.

 

[tonyp063]

405v ~21W Pq
SE triode strapped

 

[stenak]

Nice ! Do you have the schematics?

 

[tonyp063]

Mine is a tubelab SSE.
Link in post #3 for the details at George's site.

 

[jcalvarez]

410V UL push pull, 20W Pq. They don't break a sweat.