Matched Pair RCA 5U4 5U4GB Vacuum Tubes Rectifier Black Plate Selected Poems Sylvania-BRANDED 13GB5 / XL500 tube

Sylvania-BRANDED 13GB5 / XL500 tube tested to spec on our Paul Hart-calibrated TV7/U

a good-very good logo

Tube Two tested 24

This lot of three Sylvania 12BR7 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box Siemens EBF89 / 6DC8 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA 5U4 5U4GB Vacuum Tubes Rectifier Black Plate Selected Poems Sylvania-BRANDED 13GB5 / XL500 tubeThis matched pair of RCA 5U4GB rectifier tubes was tested on our Paul Hart calibrated tube tester for shorts, gas and emissions. Tube One tested 54 in Section One and 54 in Section Two as well. Tube Two tested 56 57 where minimum (65%) is 40 40 and 100% is 62 62. They have crenelated rectangular mica spacers; great flashing and side, O getters. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY