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

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

I am playing them in my Mini Mite 2013 and they sound great

It sounds fair to middlin'

gas and transconductance on our Paul Hart-calibrated TV7/U and measured as follows:

This Delco type 80 rectifier tube was tested on our Paul Hart-calibrated TV7/U

These for new old stock

This Silvertone Type 235 / 35 tube was tested on our Paul Hart-calibrated TV7/U for shorts

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

I am playing them in one of my Radio Craftsmen RC-2 monoblocks with Super Furry Animals' "Radiator" and they sound great

new in box GE 10JA5 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box matched pair of GE-MANUFACTURED 12SL7 / 12SL7GT dual triodes was tested on our Pau Hart-calibrated TV7/U for shorts

Johnson porcelain

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