Matched Pair Sylvania 6AU6 6AU6A Vacuum Tubes Valves May 22 2025 almost-perfectly-matched pair of Ken-Rad 6SJ7s

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

This Sovtek 7025 (lower-gain 12AX7/ ECC83) dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

There were no shorts or gas and they tested as follows:

new in box Siemens EBF89 / 6DC8 tube tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Sylvania 6AU6 6AU6A Vacuum Tubes Valves May 22 2025 almost-perfectly-matched pair of Ken-Rad 6SJ7sThis 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 72 for Tube One and 76 for Tube Two where minimum (65%) is 58. These tubes have top, D 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 Mann's seminal