Tesla E83CC/ECC803S/12AX7 Tubes?

[1ADSarge]

I have seen a matched pair and quad go for a pretty penny but have seen a few sets sell for a bit cheaper. Anyone heard of these and/or had any listening time with a pair of these?

 

[guitbanger]

Tesla was the Czech lamp/tube making factory which was split into two entities (mid '90's?) one of which became JJ. Highly regarded in my book, (Tesla, not JJ). Their EL34's, EL84's, and 12AX7's were the best made foreign stuff at the time (EI was right in there too) smoking the Chinese and Russian junk. IMO

 

[peterh]

Tesla was the Czech lamp/tube making factory which was split into two entities (mid '90's?) one of which became JJ. Highly regarded in my book, (Tesla, not JJ). Their EL34's, EL84's, and 12AX7's were the best made foreign stuff at the time (EI was right in there too) smoking the Chinese and Russian junk. IMO

As i have my own experience of jj i can state that they are top quality tubes.
Of my latest > 200 units one was defunct ( and replaced without cost).

As far as sound quality most reviews rank jj at the top region.

(again speaking of my own experience)