Matched Pair General Electric GE 12B4 12B4A Vacuum Tubes Valves NOS NIB Sonotone NOS NIB This Telefunken ECH81 / 6AJ6

This Telefunken ECH81 / 6AJ6 was tested on our Paul Hart-calibrated TV7 for shorts

These four new old stock

new in box US-made 6F7 tubes tested to spec on our Paul Hart-calibrated TV7/U

It sounds terrific and has great bass and sparkling highs and Donald Fagan’s voice is warm and clear as a bell

Matched Pair General Electric GE 12B4 12B4A Vacuum Tubes Valves NOS NIB Sonotone NOS NIB This Telefunken ECH81 / 6AJ6This new old stock, new in box matched trio of GE MANUFACTURED 12B4A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 47 and 50, respectively, 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 SEE OUT