Sylvania 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 6AB7Y JAN-CRC-6AB7Y Johnson porcelain

Johnson porcelain

It measured 62/52 where minimum (65%) is 40/40

The Hickok-tested 6AV5 tested 4200 micromhos where new/nominal is 3900

This lot of four North American-made number 78 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

These nine US-made 5AT8 tubes tested to spec on our Paul Hart-calibrated TV7/U

Sylvania 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 6AB7Y JAN-CRC-6AB7Y Johnson porcelainThis black plate Sylvania 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 60 45 where minimum (65%) is 40 40 and 100% is 62 62. It has a nifty, old fashioned Coke bottle; dimple sheet getter, outstanding flashing and a TOR 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