Matched Pair Sylvania 6K6 6K6GT Vacuum Tubes Silver Tops You Got To Pay new in box Zenith 17AY3

new in box Zenith 17AY3 / 17AY3A / 17BS3 / 17BS3A tubes tested to spec on our Paul Hart-calibrated TV7/U

This is a 1981 pressing

mica snubbers for increased rigidity and lowered microphonics and excellent flashing

I have played it in my Schiit Vali 2 headphone amplifier and it sounded great

new in box RCA 884 tube -- and one other just like it -- tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Sylvania 6K6 6K6GT Vacuum Tubes Silver Tops You Got To Pay new in box Zenith 17AY3This new old stock TESTING matched pair of Sylvania silver top 6K6GT tubes was tested on our Maxi Matcher tube tester with 325 volts on the plates and a bias of 36 volts for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 1690 micromhos and drew 19. 6 milliamps' plate current. Tube Two measured 1740 19. 8 where new nominal is within one standard deviation of 1900. These 6K6s are among the best looking, most solidly