3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Facades Suites Transconductance measured 57 for Tube

Transconductance measured 57 for Tube One and 65 for Tube Two where minimum (65%) is 36 and 100% is 55

new in box CBS 12DB5 tube tested to spec on our Paul Hart-calibrated TV7/U

WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES

perfectly-matched pair of RCA black plate

3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Facades Suites Transconductance measured 57 for 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