Sylvania 5Y3 5Y3G Vacuum Tube Rectifier Black Plate ST Shoulder Shape 6AB7Y JAN-CRC-6AB7Y This is an original recording

This is an original recording from 1939 and it sounds 15-20 years ahead of its time

Brands are indicated on the boxes

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

two are industrial versions

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 This is an original recordingThis 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