3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Isherwood

3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three IsherwoodThis 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

Not sure if there was ever a dust jacket

Fidelity is good

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

but the spine is in fine shape with no loose pages

new in box Raytheon 6AL11 tube tested to spec on our Paul Hart-calibrated TV7/U

" two of Pink Floyd's most delicate and ethereal songs

tell you how the tube sounds

This lot of GE black plate 6CL6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

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

two additional vertical support rods and an additional mica spacer for low microphonics