2 National Union NU Number / Type 78 #78 Vacuum Tubes Valves Shoulder ST-Shape Lot Of Two September 06 2024 It measured 55/51 where minimum

It measured 55/51 where minimum (65%) is 40/40 and 100% is 62/62

Transconductance measured 44/45 for Tube One and 45/45 for Tube Two where minimum (65%) is 25/25 and 100% is 38

new in box GE 6AC7 tubes tested to spec on our Paul Hart-calibrated TV7/U

These five Sylvania-MANUFACTURED (one is Philco-LABELED) 6AX4GT rectifier tubes were tested on our Paul Hart-calibrated TV7/U for shorts

2 National Union NU Number / Type 78 #78 Vacuum Tubes Valves Shoulder ST-Shape Lot Of Two September 06 2024 It measured 55/51 where minimumThis lot of two National Union number 78 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 44 and 46 where minimum is (65%) is 36 and 100% is 55. IN 2021 WE PURCHASED 150,000 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