Sylvania 5Y3 5Y3GT JANCHS5Y3GT VT197-A Milspec Vacuum Tube Rectifier Black Plate Number No 1 Chicago Transconductance readings are indicated on

Transconductance readings are indicated on the tops of the tubes

sheet getter

One the plus side

5 record cleaner and then played it on my He-Man Rig which consists of a Rega Planar Three with an Ortofon X5-MC cartridge on an RB-300 tone arm with a Cern Audio Dual 6SN7 / 6SL7 phono preamp / preamp feeding my Bottlehead Crack headphone amplifer driving Sennheaiser HD 580 cans

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

Sylvania 5Y3 5Y3GT JANCHS5Y3GT VT197-A Milspec Vacuum Tube Rectifier Black Plate Number No 1 Chicago Transconductance readings are indicated onThis 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