Matched Pair General Electric GE 6FQ7 / 6CG7 Vacuum Tubes Copper Support Rods NOS NIB 6C8

Matched Pair General Electric GE 6FQ7 / 6CG7 Vacuum Tubes Copper Support Rods NOS NIB 6C8This new old stock, new in box matched pair of GE MANUFACTURED 6FQ7 6CG7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One (GE MANUFACTURED, ZENITH LABELED) measured 74 76 while Tube Two measured 76 78 where minimum (65%) is 50 50 and 100% is 77 77. These tubes have copper support rods; top O getters, gray ladder plates; excellent flashing and three horizontal holes

This lot of three Sylvania-MANUFACTURED number 19 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

These matched quad of RCA milspec JRC-6H6 / 6H6 / VT-90 6H6 tubes was tested on our Paul Hart-calibrated TV7/U

This trio of Westinghouse black plate 6CG7 / 6FQ7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

They tested as follows: 44

new in box RCA 6GF7 / 6GF7A tubes tested to spec on our Paul Hart-calibrated TV7/U

Plate current measured 20

new in box US-made 6GV5 tubes tested to spec on our Paul Hart-calibrated TV7/U

6SL7s can sub for 6SN7s in some amps but I do not recommend experimenting as they have very-different bias voltages

I’m playing it now in one of my Radio Craftsman RC-2 mono blocks and it sounds great

I am playing it in one of my ArtSound single-ended amplifiers with Steely Dan’s seminal "Aja" album

respectively nominal is within a standard deviation of 1100

ZENITH-LABELED) measured 74/76 while Tube Two measured 76/78 where minimum (65%) is 50/50 and 100% is 77/77