Tube Rolling In Audio Research Phono Preamp

Pleeeease!Audio Research told me the same thing,but tube rolling was very well rewarded.There are some superb NOS tubes to still be had,but be careful about quality and price.I have had varying,but good results with Mullard 6922,Amperex 7308(best based on price),Amperex 6922 PQ(very pricey,but very good),Telefunken(over rated especially re:price),and the fabulous Siemens 6922 CCa(my current winner).The Ediswan 6922/2492,and Ediswan 6dj8/5358 are also fabulous,and I have these as well.
BTW,do a web-search for "Joe's Tube Lore".It is quite accurate,and informative.
Best.

I concur with Chris. I have a PH3SE modified by GNSC and have used Funken's and Siemens to wonderful sonic results. Now, the PH3 is packaged and put away as i have aquired a REF Phono that has been considerably modified by GNSC. V-CAPS tefelon and Caddock resistors throughout. Elna filter caps etc...ect....

I use Amperex 7308 PQ white label, RCA Blackplate 6L6GC and Phillip Miniwatts metal base 5AR4 in the power supply.
Svotek 6922 are probably the worst sounding signal tubes ever made. Anything else will beat those sonically.

ARC, like many manufacturers, care most about tube reliability and meeting their idea of what things should sound like. Of course different tubes will change the voice and tone - that's exactly what you're trying to achieve, a change to something more to your liking.

I currently have a PH-3SE an am using 6h-23 Russian tubes from the cable co. They're very quiet and are comparable to Amperex 7308's which I replaced them with. Sovteks are junk, the only reason AR is telling you that is because that's the tube they use to sell the PH-3's with which they don't even sell anymore. They went to electro harmonix as their stock tube.
Plese don't buy the siemens and telefunkens you see advertised here on Agon. They're very good and deliver exceptional sound but are not worth the astonomical price folks are asking. If people would stop buying these, the price would come down to what they're really worth which is considerably less!

This may come as somewhat of a shock, but tubes(like anything else) are worth whatever people will pay for them. If you want the best, you have to be willing to pay for it. NOTHING that is manufactured now can compare to the musicality of the select Siemens and Telefunken tubes. They last an average of 10,000 hrs, and that much musical enjoyment is hard for me to place a valuation on. I'm also using a pair of NOS TungSol round plate 6SN7GT's and a pair of NOS Sylvania 6SN7W tall boys(all from the 40's), in my Cary monoblocks. Check the prices on those if you think CCa's are expensive. People aren't going to stop buying them, because when those that are available now are gone- there won't be any more. I will admit the people that sell them on AudiogoN are awfully proud of them. I buy most of mine(the Siemens anyway) from Germany.