Sylvania 14AF7 Vacuum Tube Valve NOS-Testing February 16 2026 new in box Sylvania 12JT6A

new in box Sylvania 12JT6A tube tested to spec on our Paul Hart-calibrated TV7/U

This lot of two Ken-Rad-MANUFACTURED number 19 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

52 and 59 respectively

not included) with Pink Floyd's "Obscured By Clouds" and it sounds terrific

They measured (from left to right) 27/26

Sylvania 14AF7 Vacuum Tube Valve NOS-Testing February 16 2026 new in box Sylvania 12JT6AThis new old stock testing Sylvania 14AF7 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and it measured as follows: 51 49 where minimum (65%) is 33 and 100% is 51 51. 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