RCA 6MU8 Vacuum Tube Valve NOS NIB OA2 T35 I am playing them with

I am playing them with adapters (not included) in my Alan Eaton single-ended 45 amplifier and they sound great

These four US-made 3BZ6 tubes tested to spec on our Paul Hart-calibrated TV7/U

tiny nicks

industrial-grade GE triple mica 6201 (12AT7 / ECC81) dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

This lot of nine RCA black plate

RCA 6MU8 Vacuum Tube Valve NOS NIB OA2 T35 I am playing them withThis new old stock, new in box RCA 6MU8 tube tested to spec on our Paul Hart calibrated TV7 U. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE PROBABLY HAVE IT. PLEASE CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST OF THE TUBES WE SELL ARE OVER 60 YEARS OLD. WE CANNOT GUARANTEE FOR FAILURES AFTER POWER UP AS THERE IS NO WAY TO DETERMINE HOW TUBES WILL INTERACT WITH YOUR ELECTRONICS OR