Tubes for Raysonic CD 168

Try a pair of 6CG7, you will be fine using that tube without fear of smokin the transformer.

I forgot one, and I even queried Raysonic about its suitability for use in my 128 (they said yes) since it has slightly different characteristics from others in the 6922/6DJ8 family.

It's the Russian 6N1P, often sold as the even longer-lived 6N1P-EV, available NOS on Ebay from Eastern European sellers on an absolutely dirt-cheap basis. As in, 10 for $16 including shipping from Ukraine. At least that's what I paid, and mine arrived a bunch faster than I can get something from, say, Canada. They're well worth a try. Dave

To avoid the expense of the excellent NOS stuff try some new production JJ's or better yet, if you can find them, some pre-war Tesla's. They are a lush tube - great tone. Only down side is they can be microphonic (but not in my 128).

I also like EI 6DJ8's. Not quite as lush as the JJ's - more neutral perhaps but unlike most of the other new/recent production tubes. They are not bright, etched, or thin and way more balanced than say the EH. They might be hard to find also. I haven't tried the 6cg7 or the 6n1p.

FWIW.

*No, 6CG7 cannot substitute 6922. Aside from filament current draw, 6CG7 cannot even come close to 6922, unless you are confident enough to play with the circuitry (reset the bias, plate load resistors, grid bias, etc.).

Here are the proper listed subs for 6922:

6922WA, CCA, CV10320, CV2492, CV2493, CV8065, E88CC, E88CC01, ECC868

Dopogue
What would you compare the 6N1P and 6MN1P-EV to sound wise?
Thanks