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

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

These for new old stock

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

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

This Silvertone Type 235 / 35 tube was 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 gas and transconductance on ourThis 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