Best 845 tube out there?


I am running a pair of Cary CAD-211AE monoblocks with the standard no-name Chinese tubes shipped by Cary. Whilst I am happy with the sound, I think I should buy a pair of 845's to keep as backup in case something happens to these tubes.

Because I will need to buy FOUR of them, this rules out any tube that sells for stupid money (e.g. vintage RCA 845 tubes).

The only current production 845's I am aware of are:

- Shuguang 845 "standard"
- Shuguang 845B
- Shuguang 845C
- Shuguang PSVANE 845
- KR Audio 845

I have found reviews of the Shuguang 845B and 845C, but there is virtually no information out there on the new Shuguang "psvane" 845. Has anybody heard this valve, and is it a noticable improvement over the 845B and C? Also, what do people think of the KR?
amfibius
Hi Ed, I would second Davvie's request. Are you planning to obtain a pair of Shuguang 845T's in the near future?
I have received my Shuggy 845T's from Grant Fidelity. The first thing I noticed was that the elements on one of the valves was not aligned properly. Three of the four valves sit at 45 degrees on my amp, this particular valve sits at 30 degrees. It is not an issue with my socket, or the way I have installed it either - I removed the valve and inspected it, and it is indeed out of alignment compared to the other valves.

Whether it affects the function, I do not know. Grant Fidelity did not send me a calibration sheet (which apparently accounts for most of their premium pricing).

I have emailed them asking for an exchange for a fresh set of tubes. Waiting to hear back from them.

In the meantime, the new valves sound closed in, congested, and lacking in top and bottom frequency extension. I am not discouraged, because my "old" 845's sounded like this when they were brand new. The truth will be out once the valves are burnt in. Or rather, my new set of valves once I return this set to Grant Fidelity.
After approx. 2 weeks, my very positive view of the 845Ts has not
changed. There's been no break-in change that I can detect. Note that
these tubes replaced metal plate 845Ws in my system. Dave
Just to let everyone know that the latest TJ Full music 845 tubes are same specs as shuguang 845, 845B or RCA tubes. so, they can be use for direct replacement on your 845 amps. Quality is a lot better than the PSVANE 845T, which i'm also testing.
72 hours of burn-in on my 845T's now. The tubes are starting to open up, with the top end more extended. Bass is still poor, but getting better. Soundstage now extends to slightly beyond both speakers. Front to back layering still not as good as the original valves.

Have received word from Grant Fidelity that Shuguang do not consider a mis-aligned valves a waranteeable item, so they will not accept a return. To be fair to them, the valve does appear to work as advertised with no noticable difference between the left and right channel.

Anyway, continuing to burn in and we will see what happens.