3 RCA Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three September 1 2023 Transconductance (TV7/U): 54/51

Transconductance (TV7/U): 54/51

period labels and stamped / engraved bases

new in box JJ 5U4GB rectifier tube tested 52/51 in Sections One and Two

5/2110 where new 6F6s measure from approximately 2000 micromhos or so with plate current draw in the 20s

This lot of nine new old stock

3 RCA Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three September 1 2023 Transconductance (TV7/U): 54/51This trio of RCA 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: 42 61 (sic), 80 75 and 86 96 where minimum (65%) is 50 50 and 100% is 77 77 These tubes have steel support rods; top, harp shaped getters; black, ladder plates with shields between the triodes for reduced cross talk. I have played them with adapters (not