Sylvania 5Y3 5Y3GT JANCHS5Y3GT VT197-A Milspec Vacuum Tube Rectifier Black Plate Number No 1 Chicago This tube has great bass

This tube has great bass and sparkling highs and Mann's voice is warm and clear as a bell

sheet getter

This RCA 6L6GC output tube was tested on our Maxi-Matcher with 400 volts on the plates and a bias of -48 volts for shorts

RF shielding

7 milliamps while transconductance measured 2910 micromhos

Sylvania 5Y3 5Y3GT JANCHS5Y3GT VT197-A Milspec Vacuum Tube Rectifier Black Plate Number No 1 Chicago This tube has great bassThis 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