Tube Rolling In Audio Research Phono Preamp

I have a an ARC Ref phono preamp, which uses 10 (I think) 6922's. I retubed with NOS Amperex and NOS RCA for the 6L6. The main most immediate thing was a big drop in the noise floor. On top of that the thing just sounds better.... A lot better.

Given this, I have no idea what may happen if you tube roll in your PH3.....

Chris

I swapped out the tube in my Bellari VP129 for tube that came out of a Prima Luna. Huge improvement. I may consider upgrading to an even better tube in the future...

Funny I just posted this to another AudiogoNer: The Siemens E188CC's, 7308's and CCa's(grey plate beneath the getter support, from the 60's- the Holy Grail) are VERY dynamic and extended top(without any stridency) and bottom(very solid). I've been using them for years in ARC gear(had an SP9 and SP14), and now in my BAT VK-D5(6 NOS CCa's). Liquid midrange, very transparent(very quiet, nothing phoney, sweet, or extra warm, etc.) They just let all the music through, with an accurate sound stage. YES: The Tele's are good(of course), I've owned some of them too. Don't buy any CCa's with shiny metal under the getter support(regardless of the seller's claims): They will singe your ear hairs.

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.