12BH7
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BrandEi-RC
ClassA.F. Double Triode
BaseNoval
Filament6.3V @ 600mA
Construction
Primary TypeDouble Triode
Envelopemax. 22.2 mm x 67.3 mm
Sections2
Filament / Heater
Heater NotesIndirect heating by AC or DC, serial or parallel supply.
Absolute Maximum Ratings
Plate Voltage450 V
Plate Dissipation3.5 W
Grid 1 Voltage-250 V
Cathode Current20 mA
Audio Performance
Key Features
- A.F. Double Triode
- High voltage rating for vertical deflection
- Serial or parallel heater supply
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 amplifier | 250V | 3100 | 5300 | 16.5 | 11.5mA |
| Vertical deflection amplifier | 350V | 3100 | - | 16.5 | 16mA |
Application Notes
Commonly used as an AF amplifier or vertical deflection amplifier in television receivers.
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