12BR7
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BrandSylvania
ClassHigh Mu Triode Duo Diode
BaseSmall Button 9-Pin
Filament12.6V @ 225mA
Construction
Primary TypeTriode Duo-Diode
EnvelopeT6 1/2
Base MaterialSmall Button 9-Pin
SectionsTriode-Duo-Diode
Filament / Heater
Heater NotesSeries/Parallel
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.5 W
H-C Voltage200 V
Audio Performance
Key Features
- Miniature high mu triode duo diode
- Monochrome television receivers
- Color television receivers
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (1) | 100V | 4000 | 15000 | 60 | 3.7mA |
| Class A Amplifier (2) | 250V | 5500 | 10900 | 60 | 10mA |
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