Matched Pair Sylvania Black Plate 12BY7 12BY7A Vacuum Tubes Valves T16 59 and 62 where minimum

59 and 62 where minimum (65%) is 45

new in box US-made 6KZ8 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box International Servicemaster 6CG8A tube tested to spec on our Paul Hart-calibrated TV7/U

new in box GE 6HB7 tubes tested to spec on our Paul Hart-calibrated TV7/U

These tubes have lyre-shaped getters

Matched Pair Sylvania Black Plate 12BY7 12BY7A Vacuum Tubes Valves T16 59 and 62 where minimumThis matched pair of Sylvania black plate 12BY7 12BY7A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 54 while Tube Two also measured 54. (Minimum (65%) is 46 and 100% is 71. These tubes have black plates; chamfered O getters and rectangular radiators for cooler operation and longer tube life. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY