12AL8
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BrandRCA
ClassMedium-Mu Triode—Power Tetrode
BaseMiniature Button 9-Pin
Filament12.6V @ 0.15mA
Construction
Primary TypeTriode-Tetrode
EnvelopeT6 1/2
Sections2
Filament / Heater
Heater NotesIntended for use in automobile radios operated from a nominal 12 volt battery.
Absolute Maximum Ratings
Plate Voltage30 V
Grid 2 Voltage20 V
Grid 1 Voltage16 V
Cathode Current20 mA
H-C Voltage30 V
Audio Performance
Typical THD10%
Power Output0.04 W
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit as Class A Amplifier | 12.6V | 1000 | 13000 | 13 | 5mA |
| Tetrode Unit as Class A Amplifier | 12.6V | 15000 | 480 | - | - |
Application Notes
The triode section is intended for use as a voltage amplifier and the tetrode section is intended for use as an audio power amplifier driver.
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