Lansdale 5Y3 5Y3GT Vacuum Tube Rectifier Gray Plate Zenith Gebraucht Where the labeling took place

Where the labeling took place is anyone's guess as the Raytheon-branded tube is stamped "England" while the Ameco tube claims to have been made in the USA

These tubes have tall bases

GT and JY date codes

Both tubes measured 69 where minimum (65%) is 55

This Korean War-vintage tube has US Army Signal Corps SC 402 contract codes and 1-44 date codes

Lansdale 5Y3 5Y3GT Vacuum Tube Rectifier Gray Plate Zenith Gebraucht Where the labeling took placeThis gray plate Lansdale MANUFACTURED, Philco BRANDED 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 54 60 where minimum (65%) is 40 40 and 100% is 62 62. It has a top, D getter, gray plates; excellent flashing and 1063 6217 150 factory date codes. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY