Matched Pair RCA 12SL7 12SL7GT Vacuum Tubes NOS NIB Dylan Thomas TV7/U readings are in (parenthesis)

TV7/U readings are in (parenthesis)

These tubes have mica snubbers for increased stability and lowered microphonics

new in box Sylvania / Sylvania-MANUFACTURED 6SR7 tubes tested to spec on our Paul Hart-calibrated TV7/U

Tube One measured 57/63 while Tube Two measured 60/61 where minimum (65%) is 38/38 and 100% is 58/58

smooth mica spacer and outstanding flashing

Matched Pair RCA 12SL7 12SL7GT Vacuum Tubes NOS NIB Dylan Thomas TV7/U readings are in (parenthesis)This new old stock, new in box matched pair of RCA 12SL7 12SL7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 48 48 for Tube One and 52 46 for Tube Two where minimum (65%) is 32 32 and 100% is 49 49. These tubes have dark, gray plates and bottom, D getters. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE