Sylvania Gold Brand GB-6X4WA 6X4 Vacuum Tube Rectifier Milspec Black Plates NOS NIB 22KV6 Novar T52 and if it is

and if it is

It will need to be serviced

These seven US-made 5U8 tubes tested as good on our Hickok 800

This matched pair of Hytron gray glass 6V6GT output tubes was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -36 volts for shorts

steel support rods and gray plates

Sylvania Gold Brand GB-6X4WA 6X4 Vacuum Tube Rectifier Milspec Black Plates NOS NIB 22KV6 Novar T52 and if it isThis new old stock, new in box, black plate, milspec Sylvania GB 6X4WA was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas and it measured where minimum (65%) is 40 40 and 100% is 62 62. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY