3 RCA Number Type 78 #78 Vacuum Tubes Valves Engraved Hot-Stamped Base Mesh Plate Lot Of Three ZG 30260 Z 30262 This matched pair of new

This matched pair of new old stock-testing General Electric / GE 12SN7 12SN7GTA dual triodes was tested on our Jackson 648 Mutual Conductance tester for shorts

This lot of two GE industrial-grade 1852 (6AC7) tubes was tested on our Paul Hart-calibrated TV7/U for shorts

I just cleaned this LP set on my VPI 16

They tested to spec on our Paul Hart-calibrated TV7/U

Both tested 52/52 where minimum (65%) is 40/40

3 RCA Number Type 78 #78 Vacuum Tubes Valves Engraved Hot-Stamped Base Mesh Plate Lot Of Three ZG 30260 Z 30262 This matched pair of newThese mesh plate National Union number 78 tube 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: 36, 38 and 44 where minimum is (65%) is 36. 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