12 US-Made 6F7 Vacuum Tubes Valves Mesh Plate Shoulder Style Bottle Mesh Plate Lot Of Twelve 6K6GT

12 US-Made 6F7 Vacuum Tubes Valves Mesh Plate Shoulder Style Bottle Mesh Plate Lot Of Twelve 6K6GTThese twelve US made mesh plate 6F7 tubes were tested for shorts gas and transconductance on our Paul Hart calibrated TV7 U and tested as follows: 30 11, 31 10, 31 13, 31 16, 32 12, 32 15, 34 11, 34 15, 34 16, 35 14, 36 12 and 37 13 They have late 1930s retro styling with coke bottle glass envelopes and mesh plates. 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

It measured 58/50 where minimum (65%) is 40/40 and 100% is 62/62

This matched pair of Sylvania-MANUFACTURED

This lot of two GE 6L7 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

This matched pair of Cunningham / RCA 6F5s were tested on our Paul Hart-calibrated TV7/U for shorts

D getter and a 4-09 188-5 date / provenance code

perfectly-matched pair of RCA 6K7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

This matched pair of GE 12B4A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

32 and 33 where minimum (65%) is 25

It measured 42/49 where minimum (65%) is 50/50 and 100% is 77/77

These three GE-MANUFACTURED

On the Maxi-Matcher

new in box National Union 7Y4 tubes in this lot