3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Isherwood tell you how the tube

tell you how the tube sounds

Not sure if there was ever a dust jacket

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

but the bottle is firmly-cemented to it and there is no movement at all possible

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

3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Isherwood tell you how the tubeThis 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