Sylvania 5U4 5U4G Vacuum Tube Rectifier Black Plate Shoulder ST Variety Projection Lamp new in box milspec RCA

new in box milspec RCA 12SG7 JAN-CRC-12SG7 tube tested to spec on our Paul Hart-calibrated TV7/U

excellent flashing and a top

outstanding flashing and a 43-C2 date code

It measured 51/56 where minimum (65%) is 50/50 and 100% is 77/77

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 new in box milspec RCAThis 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