3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Isherwood respectively where new/nominal is within

respectively where new/nominal is within one standard deviation of 5000

This RCA 0A3 tube tested to spec on our Paul Hart-calibrated TV7/U

Tube Two lacks most markings and I believe it was military surplus and had its markings removed as memories of the war were a little too fresh

Not sure if there was ever a dust jacket

3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Isherwood respectively where new/nominal is withinThis trio of Westinghouse black plate 6CG7 6FQ7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measure as follows: 66 65, 72 76 and 92 90 where minimum (65%) is 50 50 and 100% is 77 77 These tubes have copper support rods; top, harp shaped getters and shields between the triodes for reduced cross talk. I have played them with adapters (not included) in my Radio