Westinghouse 5U4 5U4GB Vacuum Tube Rectifier Black Plates International Stereo This NOS-testing National Union 6F6G

This NOS-testing National Union 6F6G output tube was tested on our Paul Hart-calibrated TV7/U for shorts

Tube Two: 76/77

new in box GE 12L6GT tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box RCA 7A8 tube tested to spec on our Paul Hart-calibrated TV7/U

Westinghouse 5U4 5U4GB Vacuum Tube Rectifier Black Plates International Stereo This NOS-testing National Union 6F6GThis Westinghouse 5U4GB rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas and it measured 58 61 where minimum (65%) is 40 40. It has a top O getter; excellent flashing; black plates; a top crenelated, round mica spacer and a bottom smooth, rectangular mica spacer. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE