Matched Pair RCA 12SL7 12SL7GT Vacuum Tubes NOS NIB Dylan Thomas These four US-made 12SC7 tubes

These four US-made 12SC7 tubes tested as follows on our Paul Hart-calibrated TV7/U:

TV7/U readings are in (parenthesis)

It has a thin

5 milliamps for Tube One and 2070/25

but with some wear

Matched Pair RCA 12SL7 12SL7GT Vacuum Tubes NOS NIB Dylan Thomas These four US-made 12SC7 tubesThis 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