Sylvania 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 6AB7Y JAN-CRC-6AB7Y This lot of four North

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

OEM-BRANDED black glass 6K6GT tubes was tested on our Maxi-Matcher tube tester with 325 volts on the plates and a bias of -36 volts

Brands are indicated on the boxes

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

Johnson porcelain

Sylvania 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 6AB7Y JAN-CRC-6AB7Y This lot of four NorthThis 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