ARC Ref 3: Tung-Sol 6550 in power supply?

Bart, if you have some experience with tube rolling for Ref 3 that we have not covered yet, please enlighten us. G. Ref 3

"Bart, if you have some experience with tube rolling for Ref 3 that we have not covered yet, please enlighten us"

The short answer is that he can't

He can't even answer me whether he has tried a KT88 instead of the 6550

I would like to make it clear once again that I would never discourage tube rolling. I merely said that when all was said and done it seems that those of us who own the Ref3 (he doesn't) come back to the stock 6550C. I have also stated that tube rolling will produce a "different" sound but not always a "better" sound and that is what we leave to our ears, judgment and most of all experience

OK guys, I have already installed NOS Tung Sol in the PS of my Ref 3. Now I'm wondering, how much time I should allow for burn-in (this is a brand new tube) ?

Elberoth2, I would give the Tungsol a couple hundred hours of playing time at various gain levels to stabilize. G.

I would recommend the (blue label) GEC KT88 for this pre. I experimented with Gold Lions and Gold Monarchs as well. These are 3 variations of the vintage Genalex KT88, not re-issues. While the I preferred the GEC best, it leaned towards the euphonic side. Despite its imperfections, it made going back an impossibility. I decided to either use this pre with the GEC or not at all. I still have the GEC if anyone wants to try it.