Super Silvertone 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 6SJ7 NOS-Testing I am playing them in

I am playing them in my Sound Craftsmen RC-2 monoblocks with at 6

Tubes Three and Four measured 73/70 and 75/72

These tubes were made in the Soviet Union and sent to East Germany where

new in box RCA 6EH5 tubes tested to spec on our Paul Hart-calibrated TV7/U

It is probably a Mullard

Super Silvertone 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 6SJ7 NOS-Testing I am playing them inThis black plate Super Silvertone 5Y3G rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 57 60 where minimum (65%) is 40 40 and 100% is 62 62. It has a nifty, old fashioned Coke bottle; a D getter, good flashing for its type and a 41X date 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