Sylvania 5Y3 5Y3GT Vacuum Tube Rectifier Black Plate 117Z4 117Z4GT NOS Tube One measured 45/40 while

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

It is dead quiet when the preamp is muted and has excellent frequency response and dynamics

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

These tubes have top and side black / dark-gray bottles

Sylvania 5Y3 5Y3GT Vacuum Tube Rectifier Black Plate 117Z4 117Z4GT NOS Tube One measured 45/40 whileThis 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