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

I too have a stash of NOS 6SN7, all of the above and more, bought about 10+ years ago. I now use new production Tung-Sol coz these NOS babes are getting too expensive to get out of the box and use!

The new production TS 6SN7 (they are GTBs - actually heaps more robust than GT types) sound perfectly fine with my amp (EL34 push pull with 5AR4/GZ34 rectifier).

So Shuguang have always been on my radar, and they look pwetty. This is important, of course.

However -

I am confused about all the variants, and they are sometimes (often, usually) shown as CV181, which are in fact electronically not equivalent and are likely to blow up the amp. The current draw of CV181s is 50% more than 6SN7s. Ouch.

So, I’d like to see a test/specifications before I use any. Google is usually my friend to find specs but computer says no with Shuguang 6SN7/cv181. Might be someone else here who can help.

No specs listed, but these 6SN7WE are not the same as the Psvane CV181.

https://www.hifi-amplifiers.com/en/shuguang-electronic-tube-valve-c-68/shuguang-we6sn7-plus-vacuum-tube-high-end-western-electric-best-matched-p-5281.html

Oh, I see there is a Shuguang Treasure CV181 as well.

More WE’s...

https://m.aliexpress.com/i/32985770711.html

Lots of words in this rant from about 2009, and worth reading it all at one’s leisure.

In the meantime, this is the relevant message, about half way down just above the picture of the tube on the left -

This is why the CV181Z might not be a drop in replacement for the 6SN7. Typical 6SN7 heaters draw about 0.6A and the CV181z draws about 0.9A (900mA), the old Mullard CV181 drew 950mA. This 50% increase in heater current amounts to 0.6A for a pair of CV181 in a circuit, which as you can see represents the load of a whole extra double triode.

I’d be more decisive. "This is why the CV181 (Z, whatever) IS NOT a drop in replacement for the 6SN7." Eventually your amp will take up smoking.

The shuguang CV 181 tubes are a 6sn7 drop in replacement, the Mullard cv181 tubes are not they have a higher heater current of 900ma.