2 GM Delco 6U7 Vacuum Tubes Valves Lot of Two March 14 2023 Plate current draw was 52

Plate current draw was 52

Transconductance readings are 26

These tubes have black plates

new in box Zenith 17AY3 / 17AY3A / 17BS3 / 17BS3A tubes tested to spec on our Paul Hart-calibrated TV7/U

I am playing them (with adapters

2 GM Delco 6U7 Vacuum Tubes Valves Lot of Two March 14 2023 Plate current draw was 52These 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