Matched Pair Sylvania 6AU6 6AU6A Vacuum Tubes Valves NOS-Testing Matched Pair 6AX4 280 739 and F1 date

280 739 and F1 date codes

This album sounds very good with a few pops and clicks in the quiet passages — of which there are not many

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Saint-Saens

Matched Pair Sylvania 6AU6 6AU6A Vacuum Tubes Valves NOS-Testing Matched Pair 6AX4 280 739 and F1 dateThis new old stock testing matched pair of Sylvania 6AU6A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 74 for Tube One and 76 for Tube Two where minimum (65%) is 58. I am playing them in my Musical Paradise MC 3 single ended integrated amplifier (with adapters, not included) with Aimee Mann's seminal "Magnolia" album and they sound terrific. These tubes