12AY7 / 6072 Dual Triode
The 12AY7 or 6072 is a miniature 9-pin medium gain (40mu) dual triode tube. It has a center-tapped heater filament so it can be used in either 6.3v 300mA or 12.6V 150mA heater circuits. It was commonly used in earlier Fender preamps, and is also used in the phase-inverter section of many tube amps.
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