Matched Quad CBS-Hytron 6CL6 Vacuum Tubes Valves Black Plate NOS NIB 6K6 new in box Sylvania Number

new in box Sylvania Number 37 tube tested to spec on our Paul Hart-calibrated TV7/U

side harp getters

Transconductance measured 40

This new old stock-testing matched pair of milspec RCA 1619 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Matched Quad CBS-Hytron 6CL6 Vacuum Tubes Valves Black Plate NOS NIB 6K6 new in box Sylvania NumberThis new old stock, new in box matched quad of CBS Hytron black plate 6CL6 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 49, 50, 50 and 52 where minimum (65%) is 30. 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