Sylvania 5U4 5U4G Vacuum Tube Rectifier Black Plate Shoulder ST Variety Projection Lamp outstanding flashing and a 43-C2

outstanding flashing and a 43-C2 date code

double-saucer top getters and copious flashing

dimple getters

This lot of four RCA 50Y6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This new old stock-testing matched pair of US-made 1625 / VT-136 output triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Sylvania 5U4 5U4G Vacuum Tube Rectifier Black Plate Shoulder ST Variety Projection Lamp outstanding flashing and a 43-C2This Sylvania 5U4G rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas. It measured 57 58 where minimum (65%) is 40 40 and 100% is 62 62. This tube has 352 C date codes, a bottom, D getter and nice flashing. There are a few glass fragments inside the bottle. Fortunately they are inert and don't affect the tubes's operation. Please see picture. WE HAVE SCORES OF THOUSANDS OF VACUUM