Matched Pair Sylvania 6X5 6X5GT Black Plate Vacuum Tubes Valves Rectifiers 38HK7 NOS NIB This new old stock-TESTING matched

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

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

This hardcover book is in very good shape

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

Matched Pair Sylvania 6X5 6X5GT Black Plate Vacuum Tubes Valves Rectifiers 38HK7 NOS NIB This new old stock-TESTING matchedThis 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"