3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Isherwood but the bottle is firmly-cemented

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

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

but the spine is in fine shape with no loose pages

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 but the bottle is firmly-cementedThis 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