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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
amfibius OP
282 posts
 
Thanks Davvie. I think I will have to buy myself a set of those tubes now.
coolhand
58 posts
 
Don't forget to return here and update us on your 'post burn in' listening impressions, I'm sure many would be interested !
dopogue
1,773 posts
 
Just ordered a pair myself. I've had those glorious metal plate 845Ws in my SET monoblocks for the last 32 months but nothing lasts forever.
amfibius OP
282 posts
 
I have had a closer look at the Shuguang psvane 845T's. There is a very large image here: http://www.audiokarma.org/forums/showthread.php?s=107c668285cec06d56e3d26723df6ab1&t=318310

Now compare that to the Shuguang 845B. The best image I could find is here: http://www.edsawyer.com/images/845mb.large.jpg (the 845B is on the left).

Note the main difference - the Psvane 845T lacks the solid winged side support, and consequently has a plate at the top to stabilize the tube against the glass. On lesser 845's (e.g. the Shuguang 845), the mica top plate was criticized for causing microphonics.

Starting to have some doubts now.
brf
1,715 posts
 
Take a look at the standard Chinese 845 http://supertnt.com/public/images/product/20060303123338_845.jpg and compare the internals to the Psvane 845. Bigger glass envelope and gold covered brass base.
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