For sale is one platinum matched pair (two matched tubes) GU50 NOS in original boxes with two (2 pcs) genuine NOS ceramic sockets. Tubes are carefully tested and matched by plate current from the huge batch we have in stock.
They are the same codes, the same year of production, from 70s, much better than later ones from late 80s and 90s.
GU50 is powerful RF pentode (Pa=40W), used in many audio amplifiers and HF linear amplifiers, very similar to Telefunken Wermacht LS50 pentode.
The ceramic sockets aren't cheap Chinese ones, they are genuine NOS Soviet production from 70s, with totally different clamp system which provides much better contact and reliability.
I collect tubes and tube gear for more then 30 years and I start to sell recently, please be sure to check my other items and visit my store for more rare NOS tubes and parts.
If you buy any item on eBay from me and for if you are not fully satisfied for any reason or have any complains, please send me message before leaving negative or neutral feedback or opening a case. I really do care about your satisfaction and I’ll do my best to solve any kind of problem.
I have more than 200000 NOS tubes in stock and just small part is listed here, if you are interested in any specific tube or part, please send me message.