Audio Horizons TP 2.0 Preamplifier

Markwatkiss. CAUTION! Those are not replacements for a 6922 family tube. The 6H30 is the russian super tube that BAT first brought to the U.S.A. Now ARC uses them as well in their Ref. 3 preamp. Better check with Joesph if they will work in his circuit or you may damage your preamp.
Frank

I agree with Frank, Mark. Please double-check with Joseph. I recall reading about the Russian 6H30 tube and it draws almost three times the filament current as a 6922 and nearly twice the plate voltage.

Thanx for your concern everyone,awaiting response from Joseph and company.

The Russian tube that is a replacement for the 6922/6DJ8 is the 6N23P, which is an excellent tube and well worth trying. I don't own this preamp but I have used this tube in a Music Reference RM-9 as a replacement driver for NOS Siemens and I was completely surprised at how well this tube sounded.

Clio09. I believe it's the 6H23P. There are a couple other russian 6922's but the 6H23P is the highest military grade. I just ordered a cyro'd matched pair of this tube from tubeman.com. He claims they're much improved with the cryo treatment.
I also just received a matched quad of NOS 6H30P-DR's. I don't know alot about tubes but I just happened to research these two tubes this past week.
Frank