This is one HOT sounding Tube. It makes a difference!
The Telefunken Smooth Plate ECC83 / 12AX7 Vacuum Tube is a
miniature type used as a 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, Microphones and Outboard gear.
It is an Excellent tube for Recording Studio Applications
due to its extreme low noise. You want quiet recordings?
You want this tube! The Telefunken 12AX7 also has a very
long life span and will outlive all cheaper 12ax7's by a
mile.
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