Matched Pair General Electric GE 6FQ7 / 6CG7 Vacuum Tubes NOS NIB Copper Support Rods Top Filaments Headphone Amplifier Tube Three measured 76/76 where

Tube Three measured 76/76 where minimum (65%) is 50/50 and 100% is 77/77

black and silver bottles and 4-04 188-5 and 1-39 188-4 provenance/date codes

67 and 70 where minimum (65%) is 50

new in box Amperite 3TFV4 ballast tube tested to spec on our Paul Hart-calibrated TV7/U

each having four stamped crosses: two upside-down and two right-side up

Matched Pair General Electric GE 6FQ7 / 6CG7 Vacuum Tubes NOS NIB Copper Support Rods Top Filaments Headphone Amplifier Tube Three measured 76/76 whereThis new old stock, new in box matched pair of GE 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 measured 75 77 while Tube Two measured 79 76 where minimum (65%) is 50 50 and 100% is 77 77. These tubes have copper support rods; top O getters, gray ladder plates; top filaments for a nice light show; three horizontal holes underneath and parallel to the