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

Matched Pair Sylvania 12B4 12B4A Vacuum Tubes Valves NOS-Testing Stereo DL 75256This 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

Tube Two (diodes): 60/42

perfectly-matched pair of Sylvania 6SJ7s was tested on our Paul Hart-calibrated TV7/U for shorts

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

Plate current measured 15

(New 6SN7s typically test from 2600 micromhos and the Jackson expresses this in terms of a percentage

Shipping Credit: $64

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

gray ladder-plates

It measured 69/65 where minimum (65%) is 50/50 and 100% is 77/77

There are eight new old stock

new in box RCA triple mica 9002 tube tested to spec on our Paul Hart-calibrated TV7/U

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