Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing 6265 NOS NIB The GM-LABELED ones all have

The GM-LABELED ones all have 312 Sylvania EIA codes

This LP has light surface noise audible in quiet passages

They measured 34

This Moss Music Group DBX pressing has no surface noise but a very few pops and ticks

new in box US-made 8BA11 tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Trio RCA 6FQ7 / 6CG7 Vacuum Tubes NOS-Testing 6265 NOS NIB The GM-LABELED ones all haveThis 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