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

@invalid Thankyou for those specs, I am sufficiently comforted and will indeed buy at least a pair or two in the new year.

My amp has good space - I can even fit those round globe ones you may or may not have seen - they are kinda cute, but possibly no longer in production. Something of novelty value.

Now I have to figure out the nuances of the different types available - I’ve seen a at least a couple versions on AliExpress. I prefer premium.

Edit - just checked, Psvane (Cossor?) make the round ones, smokey glass. Tempted!

Thank you @paulcreed . 

They won't fit my amp, I'll check out adapters. They will fit my preamp, maybe I should start there.

 Who's the most trusted vendor to buy from? 

lowrider how far are closest outside diameter on your tube sockets from each other if that makes sense? My power amp has 3 6sn7 tubes up front and I have to use an adapter on the middle one. The OD of sockets is maybe a little less than 5/8 or 5/8 of an inch from each other and the adapter works to fit fat bottle between the other 2 mounted flush, it’s close and they almost touch.

I put Ken Rad vt-231 in it only ran in for a couple hours maybe it needed more time. I took them out added Shuguang and everything was airy with bass sounding correct. Ken Rads had reseeded highs bass was exaggerated just dull.  I’m going to run Ken Rads again but let them run all day they have been sitting up for years. The more I do this I may like this Shuguang better than all my other 6sn7’s. Maybe the Sylvania vt-231’s will change my mind. Glad when I find best tube and can leave it alone.

Who's the most trusted vendor to buy from? 

A prudent question.  I'm currently looking on eBay, although AliExpress is a good alternative if paypal is available.  All from China, I can't see that there is any organised distribution/dealer network.

Focused on one with 6,000 transactions, 99.3% positive feedback   That's for a pair of premium shuguang's, in a fancy solid looking box.

The box is a signal (information) that they are genuine, however defined.  I don't care for the box itself, pffftt.

@paulcreed  My amp uses 6 input tubes. They are in pairs from front of amp to back. Measuring outer diameter at closest position there is 1" between L & R tubes. However, only .25" between front pair, middle pair, and rear pair.