RCA JRC-5814A/12AU7A AUDIO VACUUM TUBE, BLACK PLATE, O GETTER, 1965 TV-7 TESTED
The tube were tested on my Hickok TV-7D/U and it read 88/86. The minimum is equal to 65% of the life of the tube.
The tube were tested on my Hickok TV-7D/U and it read 88/86. The minimum is equal to 65% of the life of the tube.
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