Matched Pair National Union NU 45 #45 Vacuum Tubes Including A 1P21 I have played it in

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

1 milliamps' plate current while Tube Two drew 19

and Tube One has a TE4 date code

They measured 85 and 75

Matched Pair National Union NU 45 #45 Vacuum Tubes Including A 1P21 I have played it inThis 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