6 Sylvania Type / Number 58 #58 Vacuum Tubes Engraved Stamped Base Lot Of Six Martin-In-The-Fields Johnson porcelain

Johnson porcelain

It sounds fair to middlin'

These for new old stock

52 and 61 where minimum (65%) is 36 and 100% is 55

These 11 RCA gray glass 6D6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

6 Sylvania Type / Number 58 #58 Vacuum Tubes Engraved Stamped Base Lot Of Six Martin-In-The-Fields Johnson porcelainThis lot of six Sylvania number type 58 stamped engraved base tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 27, 35, 37, 44, 52 and 59 respectively, where minimum (65%) is 36 and 100% is 55. 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