For your kind consideration is this vintage Telefunken ECC83 (12AX7) tube made in West Germany. It has the smooth grey plates, a halo getter, diamond on bottom of tube, fairly strong ink, and the pins are in good condition. Number on the side reads B9003101. Enjoy!
Tested on our calibrated Hickok 533A and reads Good on the Good/Bad scale on both Normal and Life Test settings. Passes tests for shorts and gas. Mutual Conductance read at 1100/1000 with 1250 being considered new.
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