Anyone try modern 6sn7 Shuguang WE type vs NOS RCA,Ken Rad

My Don Sachs preamp uses four 6sn7s. Don supplies them with Shuguang Treasure or WE6sn7plus tubes.  He swears by them.  On his website he describes the many 'holy grail' 6sn7s that he owns and then goes on to explain that the Shuguangs walk away from them all.  That's quite a statement. In my experience, they are excellent tubes. I still have the original tubes supplied with my preamp and have gone through more than 2000 hours on them an counting with not a hitch.

@sandthemall  I spoke with Don when I was shopping for a preamp. There was a 3 month wait at that time. Using Shuguang in both stages of the preamp confirms what I've read, this pre is very revealing and realistic.

I expect many of you will already know all this stuff I'm writing below. Some of you might even have the facts/chronology in your head better than I do. I share it here for those who *might not* have *been there at the time* and for whom it might prove informative.

Regarding the CV-181 terminology used with respect to 6SN7 tubes. Way back when - like a couple years ago when those tubes first came out - every site, every ad I saw for them stated specifically that they CV-181 nomenclature was incorrect and that they should only be regarded as drop-in replacements for 6SN7 tubes. And virtually all ads and sites were scratching their heads at the choice of the CV-181 name for these tubes.

Having said that, the "Black Treasure" CV-181 tubes were very highly regarded. IIRC they were Shuguang branded until Grant Fidelity, in Canada, came of with the Psvane brand name. I think that was the result of collaboration with the marketing folks at Shuguang.

The so-called WE6SN7plus tubes, specifically the ones with the orange metal base and the extremely tall bottle, were very, very highly regarded. After they'd been in production for a while there was, IIRC, a fire at the Shuguang plant and they shut down production.

Another page turned and, apparently, the top engineers who had been involved in the Psvane venture left to form Linlai.

Apparently the Linlai production tubes are well regarded. I have not tried any of them, being content with my old US production 6SN7s and my JJ 300b tubes.

After flipping through all my vintage vt-231’s and others over the last couple weeks I’m back with Shuguang WE plus 6sn7’s in the amp. All had there special sonic signature but the Shuguang’s just have a jack of all trades sound. I feel the Shuguang had the best transparency, refinement and speed out of all the 6sn7’s I tried and not to a small degree. Most important I enjoyed the amp much more once the Shuguang’s were back in the amp. 
 

lowrider57, I know a guy that has a stash of the Shuguang WE plus kt88’s and 6sn7’s. I’m going to buy some of them in the next week or so he is a couple hours away and I’m going to go pick some up. If he has extra’s would you be interested, these are new never been in an amp. He has switched gear and has no need for them.