Matched Pair Sylvania 6X5 6X5GT Black Plate Vacuum Tubes Valves Rectifiers 38HK7 NOS NIB Tube One measured 62 while

Tube One measured 62 while Tube Two measured 69

44/44 and 46/45 where minimum (65%) is 25/25 and 100% is 38/38

great flashing and 63-48 188-5 and 64-13 188-5 factory/date codes

Two are GE and one is Sylvania and all were likely for a contract hence the same boxes

Matched Pair Sylvania 6X5 6X5GT Black Plate Vacuum Tubes Valves Rectifiers 38HK7 NOS NIB Tube One measured 62 whileThis matched pair of Sylvania 6X5GT rectifier tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and emissions. There were no shorts or gas. They measured 54 56 and 55 54 where minimum (65%) is 40 40 and 100% is 62 62. They have black plates; dimpled, foil getters and rectangular top and bottom spacers. 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"