MULLARD ECC83 12AX7

TESTED DIGITAL TUBETESTER

BASING CHART = Ia 1.2 mA - S 1.6 mA/V

RESULTS = Ia 08/0.7 mA - S 1.1/1.0mA/V

LONG RIBBED GRAY PLATES, RING GETTER

SPECIAL MODEL LOW NOISE, LOW MICROPHONIC

CODE ON GLASS = f91 B8E

MADE IN BLACKBURN UK MAY 1958

IN NEW MULLARD PAPER BOX