7690
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BrandCBS
ClassMedium-mu Triple Triode
BaseE12-66
Filament6.3V @ 450mA
Construction
Primary TypeTriode
EnvelopeT-7 1/2
Base MaterialGold plated base pins
Sections3
Filament / Heater
Heater NotesContinuous-wound coil heater
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation2.8 W
H-C Voltage200 V
Audio Performance
Key Features
- Gold plated base pins
- Continuous-wound coil heater
- Extreme reliability
- Stable characteristics
- Long life
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Each Section) | 100V | 4000 | 15000 | 60 | 3.7mA |
| Class A Amplifier (Each Section) | 250V | 9500 | 10900 | 60 | 10mA |
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