Matched Pair RCA Black Plate 6AU7 Vacuum Tubes NOS-Testing Музыка Барокко These milspec Ken-Rad JAN-CKR-6L7 tubes

These milspec Ken-Rad JAN-CKR-6L7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box CBS-Hytron 8CS7 tested to spec on our Paul Hart-calibrated TV7/U

Tube One measured 59 while Tube Two measured 64 where minimum (65%) is 46 and 100% is 71

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

Matched Pair RCA Black Plate 6AU7 Vacuum Tubes NOS-Testing Музыка Барокко These milspec Ken-Rad JAN-CKR-6L7 tubesThis new old stock testing, perfectly matched pair of RCA black plate 6AU7 dual triodes was tested on our Hickok 800 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 2600 2600 micromhos for both tubes. (New 6AU7s typically test within a standard deviation of 2400 micromhos). I am playing them in my Alan Eaton single ended triode amplifier (with adapters, not included) as I write and they sound great. These