Matched Pair RCA 7B7 Vacuum Tubes 17AY3A T31 T55 new in box GE 12JN8

new in box GE 12JN8 tested to spec on our Paul Hart-calibrated TV7/U

new in box GE GE32 transistor is unopened cellophane

new in box matched pair of JJ low noise 12AX7 / ECC83 / 12AU7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

I am playing them as I write in my Alan Eaton single-ended triode amplifier with Pink Floyd's Immersion Set-version of "Dark Side Of The Moon At Wembley" and they sound outstanding

This Sylvania 6BQ7A tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA 7B7 Vacuum Tubes 17AY3A T31 T55 new in box GE 12JN8This nearly perfectly matched pair of RCA 7B7 tubes was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 60 for Tube One and 61 for Tube Two where minimum (65%) is 43 and 100% is 66. They have mica snubbers for increased vibration resistance and lowered microphonics and great flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT.