Matched Pair General Electric GE 6FQ7 / 6CG7 Vacuum Tubes Valves Copper Support Rods NOS NIB Recordings Stereo The GM-LABELED ones all have

The GM-LABELED ones all have 312 Sylvania EIA codes

This lot of four Tung-Sol 6AC7s was tested on our Paul Hart-calibrated TV7/U for shorts

new in box Sylvania 12AV7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance: 1410 / 1411 (New is approximately 1450)

Matched Pair General Electric GE 6FQ7 / 6CG7 Vacuum Tubes Valves Copper Support Rods NOS NIB Recordings Stereo The GM-LABELED ones all haveThis new old stock, new in box nearly perfectly 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 measured 76 74 while Tube Two (GE MANUFACTURED, ZENITH LABELED) measured 76 76 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