Sylvania 5Y3 5Y3GT JANCHS5Y3GT VT197-A Milspec Vacuum Tube Rectifier Black Plate Number No 1 Chicago These tubes have narrow 19

These tubes have narrow 19 MM plates

Unfortunately it is MISSING ITS CENTERING PIN (please see Picture Four for a close-up) and has been marked for safe-and-easy insertion

One the plus side

sheet getter

Sylvania 5Y3 5Y3GT JANCHS5Y3GT VT197-A Milspec Vacuum Tube Rectifier Black Plate Number No 1 Chicago These tubes have narrow 19This new old stock testing, black plate, milspec Sylvania 5Y3GT JAN CHS 5Y3GT VT197 A rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 48 52 where minimum (65%) is 40 40 and 100% is 62 62. It has a bottom, sheet getter, nice flashing for its type; a US Army Signal Corps anchor logo and a K4 date code. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT