Sylvania 5Y3 5Y3GT Vacuum Tube Rectifier Black Plate 117Z4 117Z4GT NOS This tube has two additional

This tube has two additional vertical support rods

new in box GE 22JR6 tubes tested to spec on our on our Jackson 648

Tube One measured 45/40 while Tube Two measured 52/50 where minimum (65%) is 40/40 and 100% is 62/62

This album sounds very good

This lot of three US-made 6AG7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Sylvania 5Y3 5Y3GT Vacuum Tube Rectifier Black Plate 117Z4 117Z4GT NOS This tube has two additionalThis black plate Sylvania 5Y3GT rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 55 51 where minimum (65%) is 40 40 and 100% is 62 62. It has a top, O getter and an 805 ACP date provenance code. 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