Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing 6265 NOS NIB new in box GE 38HK7

new in box GE 38HK7 tube tested to spec on our Paul Hart-calibrated Hickok TV7/U

These tubes have top O saucer getters

This LP has light surface noise audible in quiet passages

Tube One: 31

The GM-LABELED ones all have 312 Sylvania EIA codes

Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing 6265 NOS NIB new in box GE 38HK7This new old stock testing matched trio of RCA 6FQ7 6CG7 dual triodes was tested on our TV7 U for shorts, gas and transconductance. There were no shorts or gas and their readings are as follows: Tube One measured 74 76 while Tube Two measured 76 76. Tube Three measured 76 76 where minimum (65%) is 50 50 and 100% is 77 77. These tubes have steel support rods; ladder plates; side D getters and excellent flashing. As I write, I am playing them with