3 US-Made Number Type 78 #78 Vacuum Tubes Valves Engraved Hot-Stamped Base Mesh Plate Lot Of Three Tung-Sol 6L6 These six gray glass 12BY7

These six gray glass 12BY7 / 12BY7A / 12BV7 tubes tested as follows on our Paul Hart-calibrated TV7/U where minimum (65%) is 46:

52/52 and 54/54 where minimum (65%) is 40/40

double-side getters and and absolutely no flashing -- somewhat-disconcerting

Three of these tubes are available initially in this Dutch Auction

3 US-Made Number Type 78 #78 Vacuum Tubes Valves Engraved Hot-Stamped Base Mesh Plate Lot Of Three Tung-Sol 6L6 These six gray glass 12BY7These lot of three mesh plate, engraved base number 78 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 40, 50 and 60 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 OUR ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT