Matched Pair Westinghouse 12AU7 12AU7A ECC82 Black Plate Vacuum Tubes Valves March 06 2025 but I could find no

but I could find no settings to test it

new in box GE 12DB5 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 48 for both where minimum (65%) is 36 and 100% is 55

Plate current measured 20

new in box National Union 7Y4 tubes in this lot

Matched Pair Westinghouse 12AU7 12AU7A ECC82 Black Plate Vacuum Tubes Valves March 06 2025 but I could find noThis matched pair of Westinghouse black plate 12AU7A ECC82 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 68 75 for Tube One and 72 68 for Tube Two where minimum (65%) is 56 56 and 100% is 86 86 They have matte, black 17MM plates; goal post getters; steel support rods and excellent flashing. I have played them in my Radio Craftsmen RC 2 monoblocks