12AX7 / ECC83
HIGH-MU TWIN TRIODE
Pin Element Unit
1 Plate (Anode) Triode
2
2 Control Grid
3 Cathode
4 Filament
5 Filament
6 Plate (Anode) Triode
1
7 Control Grid
8 Cathode
9 Filament Center-Tap
Miniature types used as phase
inverters or twin resistance-
coupled amplifiers. Each triode
unit is independent of the other
except for common heater.
Requires miniature 9-contact socket.