Sylvania 5Y3 5Y3GT/G JAN-CHS-5Y3GT/G VT197A Milspec Vacuum Tube Rectifier Black Plate And The Raiders It has an engraved /

It has an engraved / stamped base

There is some cathode coating that has shed from the filaments

Tube Two is a bit microphonic and it is therefore recommended that this matched pair not be used in areas with excessive vibration

I am playing them in one my Radio Craftsmen RC2 mono blocks as I write and they sound super even though they test poorly and have that oxide isse

4 for Tube One and 30

Sylvania 5Y3 5Y3GT/G JAN-CHS-5Y3GT/G VT197A Milspec Vacuum Tube Rectifier Black Plate And The Raiders It has an engraved /This black plate, milspec Sylvania 5Y3GT G JAN CHS 5Y3GT G VT 197A rectifier tube was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas. It measured 53 47 where minimum (65%) is 40 40 and 100% is 62 62. It has a bottom, sheet getter; a US Navy anchor logo and ribbed, black plates. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE