The Silvertone 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 as
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.
These are Good Ol' American, Made in the USA Vacuum tubes.
These are also the ones all the other modern, so to
speak, Russian and chinese manufactures have been trying
to copy. They don't try to copy you because you made
something wrong. Ha!
Electrical Data:
Heater Voltage ....................... 6.3/12.6 V
Heater Current ....................... 0.3/0.15 A
Preferred Substitutes ............... 12DF7 12DM7
Substitutes ............................... 12AD7
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on 12AX7's