Matched Pair Sylvania 12B4 12B4A Vacuum Tubes Valves NOS-Testing Stereo DL 75256 gray ladder-plates

gray ladder-plates

They measured 29 and 31 where minimum (65%) is 22 and 100% is 40

new in box US-made 1V2 tubes tested to spec on our Paul Hart-calibrated TV7/U

There are eight new old stock

This GE 6AS5 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Sylvania 12B4 12B4A Vacuum Tubes Valves NOS-Testing Stereo DL 75256 gray ladder-platesThis new old stock testing, perfectly matched pair of Sylvania 12B4A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 46 while Tube Two measured 46 where minimum (65%) is 32 and 100% is 49. Wish I could tell you how they sound, but I don't have any equipment that uses these. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO