Matched Pair Sylvania 6AU6 Vacuum Tubes Valves NOS-Testing RCA Black Plate I have played it in

I have played it in one of my ArtSound 805 monoblocks and it sounds excellent

Transconductance readings are indicated on the tops of the tubes

58 and 67 where minimum (65%) is 48

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Matched Pair Sylvania 6AU6 Vacuum Tubes Valves NOS-Testing RCA Black Plate I have played it inThis new old stock testing matched pair of Sylvania 6AU6 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 82 for Tube One and 84 for Tube Two where minimum (65%) is 58. These tubes have top, U getters; gray plates and excellent flashing. I am playing them in my Musical Paradise MC 3 single ended integrated amplifier (with adapters, not included) with Aimee