Auction is for four (4) tubes, platinum matched quad within 5% of  PL81 21A6. 

I have few boxes of 100 pcs PL81 / 21A6 made in EI tube plant back in 1982. These are premium grade PL81 tubes with exceptional quality control. 



All quads I have listed for sale are really perfectly matched with exact or almost exact parameters due to big qty I have in stock and all quads are with same etched codes.




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 collect tubes and tube gear for more then 35 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.

I have more than 250000 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.