4 Ken-Rad 6K6 6K6GT Vacuum Tubes Valves Black Glass Lot Of Four December 25 2024 new in box GE 12FX8A

new in box GE 12FX8A tubes tested to spec on our Paul Hart-calibrated TV7/U

It measured 58/50 where minimum (65%) is 40/40 and 100% is 62/62

This album does not appear to be in its original jacket

This matched trio of RCA 5Z4 rectifier tubes were tested on our Paul Hart-calibrated TV7/U for shorts

4 Ken-Rad 6K6 6K6GT Vacuum Tubes Valves Black Glass Lot Of Four December 25 2024 new in box GE 12FX8AThese Ken Rad MANUFACTURED, OEM BRANDED black glass 6K6GT tubes were tested on our Maxi Matcher tube tester with 325 volts on the plates and a bias of 36 volts and tested as follows: Tube One: 20 milliamps' plate current, 1480 micromhos' transconductance; Tube Two: 21. 9 1700; Tube Three: 23. 9 1730 and Tube Four: 34 2240 where new nominal is within one standard deviation of 1900. Sorry I cannot say how they sound, but I have not been able to find a