Matched Pair Canadian General Electric GE 12SN7 12SN7GT Vacuum Tubes Valves Black Plate NOS NIB 7476 7676 7676 new in box US-made 8AW8A

new in box US-made 8AW8A tubes tested to spec on our Paul Hart-calibrated TV7/U

wing-plates

These five RCA 5763 tubes tested as follows on our Paul Hart-calibrated TV7/U:

It is a faithful transfer of the 78 sources and

new in box RCA 6JH6 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Canadian General Electric GE 12SN7 12SN7GT Vacuum Tubes Valves Black Plate NOS NIB 7476 7676 7676 new in box US-made 8AW8AThis new old stock, new in box matched pair of Canadian GE black, T plate 12SN7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they tested as follows: Tube One: 83 84 Tube Two 85 86 These tubes have steel support rods; black T plates; rectangle top mica spacers with chevrons; D getters and short bases. I am playing them as I write in my Alan Eaton single ended triode