2 National Union NU Number / Type 78 #78 Vacuum Tubes Valves Shoulder ST-Shape Lot Of Two September 06 2024 new in box GE 6AC7

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

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

This new old stock-testing matched pair of RCA 6BL7GTA dual triodes was tested on our TV7/U for shorts

new in box GE 6AV5GA and 6AV5GT tubes tested to spec on our Paul Hart-calibrated TV7/U

2 National Union NU Number / Type 78 #78 Vacuum Tubes Valves Shoulder ST-Shape Lot Of Two September 06 2024 new in box GE 6AC7This 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