Matched Pair National Union NU 45 #45 Vacuum Tubes Including A 1P21 This matched trio of RCA

This matched trio of RCA 6FQ7 / 6CG7 dual triodes was tested on our TV7/U for shorts

A nine out of ten

I have played it in my Schiit Vali 2 headphone amplifier and it sounded great

1 milliamps' plate current while Tube Two drew 19

These three RCA plate number 78 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair National Union NU 45 #45 Vacuum Tubes Including A 1P21 This matched trio of RCAThis pair of National Union black plate 45 output triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 62 while Tube Two measured 69. Minimum (65%) is 47 and 100% is within a half standard deviation of 72 or so. These tubes have banded phi shaped mica spacers; GT and JY date codes; dimpled sheet getters; ribbed, charcoal plates and excellent flashing WE HAVE SCORES OF