The JJ ECC83 / 12AX7 is a miniature type used as phase
inverter or amplifier in AC / DC radio equipment and in
many diversified applications such a multivibrators or
oscillators in industrial control devices. They require
a noval 9-contact socket.
This tube is also a main stay in many Guitar and Bass
Amplifiers. They have similar construction to Telefunken
ECC803s vacuum tubes. These tubes are tough, rugged and
excellent for guitar amplifiers. Especially with all the
rough and tumble moving guitar amps get in transport to
clubs and concert halls.
The JJ ECC83S vacuum tube is Awesome and Excellent in all
Marshall Amplifiers!
Electrical Data:
Heater Voltage ........................ 6.3/12.6 V
Heater Current ........................ 0.3/0.15 A
Preferred Substitutes ............ 12DF7 12DM7 ECC83
Substitutes .................................. 12AD7
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on 12AX7's