Sylvania Black Plate 5U4 5U4G Hanging Filament Vacuum Tube Rectifier Shoulder ST Shape Synergy Vinyl LP new in box RCA 3BC5

new in box RCA 3BC5 / 3CE5 tube tested to spec on our Paul Hart-calibrated TV7/U tube tester

irregularly-crenelated circle

side O getters and crenelated

6 milliamps' plate current and measured 2000 micromhos

Sylvania Black Plate 5U4 5U4G Hanging Filament Vacuum Tube Rectifier Shoulder ST Shape Synergy Vinyl LP new in box RCA 3BC5This Sylvania hanging D filament 5U4G rectifier tube tested 53 in Section One and 54 in Section Two on our Paul Hart calibrated TV7 U where minimum (65%) is 40 40 and 100% is 62 62. It has a 5MR date code; a bottom D or perhaps U getter and mica snubbers. IT HAS HAD SOME OXIDE SHEDDING. PLEASE SEE PICTURE. 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