RCA 5963 12AU7 TIGHT MATCH PAIR LONG PLATE HALO GETTER TEST NOS+ VINTAGE 1960's

This listing is for a tightly matched and balanced pair of 1960's RCA 5963/12AU7 with long plates, and halo getter in excellent condition...They test well in the NOS range, as well as checked in my Trace Elliot Velocette where they were extremely low noise/microphonics, and performed flawlessly...The 5963's are a special industrial version of the 12AU7, and built to last a lifetime or three...

Average NOS test results for 12AU7's 2200 microhmos on the Hickok 600A...
Average NOS test results for a 12AU7 on the Orange tester is 8-10...

Tube 1...2475/2400Gm and 9/9
Tube 2...2750/2800Gm and 10/10

Hello, I am a 12 year tube seller, whose decided to sell my best of the best vintage tubes on Reverb...One thing that may differentiate me from the average seller is that I am a 40+ year guitar player, and close to 30 year high end audio nut that buys, tests, fondles, sells, and altogether spends an unhealthy amount of time with thousands of tubes per year...This makes me an extremely reliable source for vintage tubes...Pretty much all get tested on a meticulously maintained Hickok 600A, B&K 700 Dynajet, and Orange Valve Tester which has been extremely reliable for matching preamp and power tubes..All tubes that go on Reverb will also have been checked for noise and microphonics in either high end tube stereo equipment, or pro audio amplifiers...Not many sellers can say that...

You will receive the exact tube(s) in the photographs, unlike many other sellers who use generic photos and then you receive something else...I will also not claim a tube is true brand NOS unless i'm reasonably certain that is the case, but the vast majority of used tubes I sell here will be in excellent functional condition...If a tube is branded with some other logo, know with 100% certainty that I have identified it correctly, and it was manufactured by exactly whom I said it was manufactured by, and that's truly what you care about...Feel free to challenge me though if you feel up to it😉

Shipping is $7.95 in the U.S., $18.95 to Mexico and Canada, and $26.95 everywhere else...I will combine shipping of 2 or more purchased listings at a rate of $2.00 per listing after the first one...