Matched Pair Sylvania 6AU6 Vacuum Tubes NOS-Testing 12EQ7 NOS NIB I have listened to all

I have listened to all four LPs

This RCA 6JM6A tube is new old stock

This lot of three RCA 6SF7 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

nostalgic-looking Super Silvertone 6P5G triode was tested on our Paul Hart-calibrated TV7/U for shorts

new in box matched quad of CBS-Hytron black plate 6CL6 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair Sylvania 6AU6 Vacuum Tubes NOS-Testing 12EQ7 NOS NIB I have listened to allThis 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