6SN7 for Sex Amp

[Cary]

I just want to be sure is it safe to use the 6SN7 in the SEX 2.0 and 2.1 without changing anything?

Thanks!

Cary

 

[Paul Birkeland]

You'll need 6SN7GTB's, and to be OK with them not providing their otherwise expected lifetime of service.

 

[johnsonad]

They need to be GTB tubes though as they are rated for 400v.

 

[Paul Joppa]

They need to be GTB tubes though as they are rated for 400v.

And they can take 5 watts on one plate - original 6SN7s are rated 2.5 watts maximum.

 

[boulos]

I've tried a few well used 6SN7GTB tubes in the SEX 2.1.  As cautioned before, the amp runs the tubes harder than usual for a 6SN7.  It has revealed a few tubes to be noisy (or perhaps it contributed to the issue).