2 GM Delco 6U7 Vacuum Tubes Valves Lot of Two March 14 2023 I am playing them (with

I am playing them (with adapters

These tubes have black plates

Tube One measured 73/75 while Tube Two measured 75/76 where minimum (65%) is 56/56 and 100% is 87/87

It measured 47/50 where minimum (65%) is 40/40 and 100% is 62/62

Plate current draw was 52

2 GM Delco 6U7 Vacuum Tubes Valves Lot of Two March 14 2023 I am playing them (withThese two GM Delco 6U7 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. They tested (from left to right) as follows: 56 and 59 where minimum (65%) is 40. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT