High-Mu Twin Triode * * * * * ( Grey Plate )
Made in Great Britain
The British made Mullard 12AX7 / ECC83 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 a Very Smooth sound to them. They
are one of the best sounding tubes you can buy.
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