Matched Pair Sylvania 6AU6 Vacuum Tubes Valves NOS-Testing 6AC7 Octal OM2 Zenith-LABELED 6C8G dual triode was

Zenith-LABELED 6C8G dual triode was tested on our Paul Hart-calibrated for shorts

new in stock GE set of seven pin tubes to re-tube your All American Five set

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

They measured 84/74 for Tube One and 87/73 for Tube Two where minimum (65%) is 57/57 and 100% is 88/88

210 5213 and no provenance/date codes

Matched Pair Sylvania 6AU6 Vacuum Tubes Valves NOS-Testing 6AC7 Octal OM2 Zenith-LABELED 6C8G dual triode wasThis 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