Update ... bought a tube adaptor to fit 5670 tubes into the 6n2 ... lost some gain ..and the sound quite different... 12039192_10153572898569477_3865869452169994498_n.jpg

swapped out the CVs with RCAs ...wow...my thoughts were they sound pretty much like SS amps.. 11990471_10153549315924477_1908793972645639067_n.jpg

The shu guang 7025 is a direct replacement or need to modify the pins? Seems the 7025 is 12AX7 equivalent.

I got a unit ...replaced with UK CV tubes...very good. But still having a hard time finding a replacement for the 6n2. https://scontent-sin1-1.xx.fbcdn.net/hphotos-xtp1/v/t1.0-9/11219603_10153520910409477_1596331254382047647_n.jpg?oh=3bb28f695e35aa64476cfc33da4304ea&oe=567A289D

Let me know if which tube(s) you want to know. I am still looking around for other tubes to try. I got a pair of RCA command 5670 on the way to me. I still looking for a pair of lower price Slyvania Gold Brand 5670/2c51...prices are getting higher and higher. My best tubes cost more than the...

I got one too ...  rolled it with various 6AS7, 6080 from cheap RCAs to WE 421a/5998 ... headphone used are AKG K142 and K7XX.   Swap out all the stock Chinese tubes including the magic eyes with German Valvo EM87 tubes...got another set from Mullard EM87   The pre tubes I have used so...