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12AY7 / 12AY7A / 6072
The 12AY7 also identified in US with the initials 6072 is a double "medium gain" triode with pin-outs identical to the 12AX7 family and similar and is, in fact, replaceable in your amplifier or other device that with its lower gain will give you a richer, warmer and smoother sound while maintaining a strong character, a true Blues sound! The 12AY7 naturally has electrical and operating properties different from the others (it absorbs more currents, different capacitance and anodic dissipation) so it must be appropriately adapted.
EQUIVALENCE: 12AY7A = 6072 = 6072A = CV3650 = 6Н4П