Sensibly equivalent¶ to:
The 12AU7A was designed as a pair of general purpose voltage amplifier triodes. Two independent valves exist within the envelope.
The anode is formed into a rectangular shell with heat radiating side wings.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 47 mm tall.
Reference: Data-sheet. Type 12AU7A was first introduced in 1956.
Absolute Maximum Operating Conditions¶
Updated February 23, 2013. shape:thin.glass.tube construction:all.glass type:double.triode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.a pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.a pin:7.g1 pin:8.k pin:9.hct