Tube-number record
6664/6AB4
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BrandRCA
ClassHigh-Mu Triode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 150 mA
Construction
Primary TypeTriode
EnvelopeT5-1/2
SectionsSingle
Filament / Heater
Heater NotesWhen operated from storage-battery systems, heater voltage variations up to +/- 20% may be tolerated for short periods.
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation2.9 W
Grid 1 Voltage-55 V
H-C Voltage100 V
Audio Performance
Key Features
- High-Mu Triode
- Mobile Communications Equipment Type
- 7-Pin Miniature
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100 V | 4000 | 15000 | 60 | 3.7 mA |
| Class A1 Amplifier | 250 V | 5500 | 10900 | 60 | 10 mA |
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