Matched Pair RCA 12SL7 12SL7GT Vacuum Tubes NOS NIB Dylan Thomas but with some wear

but with some wear

These tubes have mica snubbers for increased stability and lowered microphonics

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

They tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA 12SL7 12SL7GT Vacuum Tubes NOS NIB Dylan Thomas but with some wearThis 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