6679/12AT7
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BrandSylvania
ClassHigh-mu Duo Triode
BaseNoval (B9A)
Filament12.6V @ 150mA
Construction
Primary TypeTriode
EnvelopeT-6 1/2
Sections2
Filament / Heater
Heater NotesSeries/Parallel
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation2.8 W
Grid 1 Voltage-55 V
H-C Voltage100 V
Audio Performance
Key Features
- Mobile communications design
- Withstands high on-off cycling
- Operation under normal automotive supply variations
- T-6 1/2 envelope
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100V | 4000 | 15000 | 60 | 3.7mA |
| Class A1 Amplifier | 250V | 5500 | 10900 | 60 | 10mA |
Application Notes
Designed specifically for use in mobile communications equipment. Intended for use as a grounded grid amplifier or frequency converter at frequencies below 300 Mc.
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