Matched Pair Sylvania 6AU6 Vacuum Tubes Valves NOS-Testing 6AC7 Octal OM2 I am playing it it

I am playing it it in my Bottlehead Crack headphone amplifier as I write and it sounds great

MOST OF THE TUBES WE SELL ARE OVER 60 YEARS OLD

This lot of four North American-made number 78 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

large top and small bottom mica spacers and excellent flashing

Matched Pair Sylvania 6AU6 Vacuum Tubes Valves NOS-Testing 6AC7 Octal OM2 I am playing it itThis 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 85 for Tube One and 86 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