High-Mu Twin Triode * * * * *
The Mesa Boogie 12AX7 / 12AX7A / 7025 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. This particular tube is
manufactured in Russia and China.
They require a noval 9-contact socket.
The Mesa/Boogie 12AX7A tube, a medium graded
preamplifier, is also a main stay in many Guitar
and Bass Amplifiers. It has been developed to provide a
combined high gain output along with an even balance
between high and low tones within the audio spectrum.
Mesa/Boogie tubes are Good quality tubes. Not the best.
But Good.
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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