Matched Pair Westinghouse 5U4 5U4GB Vacuum Tubes Valves Rectifier Black Plates JANCNU807 Transconductance measured 67 for Tube

Transconductance measured 67 for Tube One and 68 for Tube Two where minimum (65%) is 40 and 100% is 62

It is missing its CENTERING PIN and has been marked for safe and easy insertion

new in box Zenith 6DQ4 tube tested to spec on our Paul Hart-calibrated TV7/U

" "Water In The Lake

Matched Pair Westinghouse 5U4 5U4GB Vacuum Tubes Valves Rectifier Black Plates JANCNU807 Transconductance measured 67 for TubeThis matched pair of Westinghouse 5U4GB rectifier tubes was tested on our Paul Hart calibrated TV7 U. Tube One measured 57 58 while Tube Two measured 58 58. Minimum (65%) is 40. They have top D getters; nice flashing; black plates; top crenelated, rectangular mica spacers and bottom smooth, rectangular mica spacers. 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