Trio RCA Gray Glass 12BY7 12BY7A Vacuum Tubes Valves

Trio RCA Gray Glass 12BY7 12BY7A Vacuum Tubes ValvesThis trio of RCA gray glass 12BY7 12BY7A tubes was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 55 while Tube Two measured 60. Tube Three measured 62. (Minimum (65%) is 46. 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

Special Features: none

but this is a somewhat-noisy pressing

new in box GE 6DU3 / 6DQ3A tube tested to spec on our Paul Hart-calibrated TV7/U

This lot of five Sylvania 6AG7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

This lot of six RCA 6GH8A tubes tested to spec on our Paul Hart-calibrated TV7/U

5 record cleaner and then played on my Rega Planar Three

This perfectly-matched quintet of new old stock-testing Sylvania-MANUFACTURED 7A7 tubes was tested on our Hickok 800 for shorts

new in box GE 12DK7 tubes tested to spec on our Paul Hart-calibrated TV7/U

Minimum (65%) is 32/32 and 100% 66/66

This pair of Raytheon 7189 (6BQ5 / EL84) output tubes was tested on our Maxi-Matcher 2 for shorts

Minimum (65%) is 57/57

new in box GE 6LE8 tubes tested to spec on our TV7