6sn7 and 5u4 tubes

I don't have your amp, but you might want to check with Brent Jesse - http://www.audiotubes.com/6sn7.htm; good selection, good prices ,honest advice - not afflated other than as a satisfied customer

go to the tubeseller.com website for a description of 6SN7 tube sounds.
Larry

My intro to tube rolling began seven years ago when I bought a Blue Circle BC21 preamp.

I was pretty shocked by the transformation when I replaced the stock 6SN7s with WWII era VT-231s.

My favorites for the BC21 are the ones Rodman99999 suggests, the Sylvania and Ken-Rad VT-231s. Both tubes convey an enormous sense of scale while also imparting the positive qualities of this era of tubes. Refinement, dimensionality and a great midrange.

I feel the Sylvania is a bit more neutral, while the Ken-Rad seems more organic. I should say I have a preference for the black glass Ken-Rad over the clear glass version. In my set up, the black glass sounds, bigger, bolder and richer.

Godd luck!

forgot to tell you...don't use Ebay to buy....go to well known respected tube dealers...they will test tubes and have a return policy
BTW I like the KenRad VT231 also but couldn't hear a difference between the clear and black glass.

Larryken,

I've only owned two pairs of the clear glass Ken-Rads, so it could just be a case of bad luck on my part...or a good ol' case of Audiophilia Psychosomatica. Heheh.