12 US-Made 6F7 Vacuum Tubes Valves Mesh Plate Shoulder Style Bottle Mesh Plate Lot Of Twelve 6K6GT It measured 58/50 where minimum

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

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

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

new in box National Union 7Y4 tubes in this lot

These three GE-MANUFACTURED

12 US-Made 6F7 Vacuum Tubes Valves Mesh Plate Shoulder Style Bottle Mesh Plate Lot Of Twelve 6K6GT It measured 58/50 where minimumThese 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