7 US-Made 12B4 12B4A Vacuum Tubes Valves Lot Of Seven April 06 2023 This Cunningham narrow bottle 25Z5

This Cunningham narrow bottle 25Z5 tube was tested on our Paul Hart-calibrated TV7/U for emissions

Sorry for those of you who need two strong

This lot of three US-made 7F7 tubes was tested on our Paul Hart-calibrated TV7/U and measure as follows:

new in box matched pair of RCA Clear Top 7AU7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

new in box Philco 7A5 tube tested to spec on our Paul Hart-calibrated TV7/U

7 US-Made 12B4 12B4A Vacuum Tubes Valves Lot Of Seven April 06 2023 This Cunningham narrow bottle 25Z5This lot of seven US made 12B4A tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 28, 32, 32, 39, 44, 48 and 51 where minimum (65%) is 32 and 100% is 49. 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