National Union NU Black Plate 5U4 5U4G Vacuum Tube Rectifier Shoulder ST Shape Somerset SF-9100 It has a sutured top

It has a sutured top

I am playing them in my Musical Paradise MC-3 single-ended integrated amplifier as I write with Aimee Mann's seminal "Magnolia" album and it sounds terrific

This trio of Westinghouse black plate 6CG7 / 6FQ7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

55/57 and 57/62 respectively

Flashing Quality: good (for this type

National Union NU Black Plate 5U4 5U4G Vacuum Tube Rectifier Shoulder ST Shape Somerset SF-9100 It has a sutured topThis National Union NU 5U4G rectifier tube tested a perfectly balanced 57 in both sections on our Paul Hart calibrated TV7 U where minimum (65%) is 40 40 and 100% is 62 62. It has a bottom D getter; 5113 date codes and nice flashing. 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 OR HAVE ANY