Matched Pair Canadian General Electric GE 12SN7 12SN7GT Vacuum Tubes Valves Black Plate NOS NIB 7476 7676 7676 These four US-made 6AB4 tubes

These four US-made 6AB4 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 2850 micromhos for Tube One with a current draw of 21

IN WELL OVER 7000SALES

wing-plates

clear recording with sparking highs and nice bass

Matched Pair Canadian General Electric GE 12SN7 12SN7GT Vacuum Tubes Valves Black Plate NOS NIB 7476 7676 7676 These four US-made 6AB4 tubesThis 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