Matched Pair Sylvania 6X5 6X5GT Black Plate Vacuum Tubes Valves Rectifiers 38HK7 NOS NIB 53/53 where minimum (65%) is

53/53 where minimum (65%) is 40/40 and 100% is 62/62

Minimum (65%) is 44

Tube One measured 62 while Tube Two measured 69

new in box (For Tube One) matched pair of Unitron 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

This new old stock-TESTING matched pair of engraved base RCA Cunningham Radiotron number / type 30 tubes tested 34 and 36

Matched Pair Sylvania 6X5 6X5GT Black Plate Vacuum Tubes Valves Rectifiers 38HK7 NOS NIB 53/53 where minimum (65%) isThis 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"