Tube-number record
7898
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BrandRCA
ClassHigh-Mu Twin Triode
BaseNoval (B9A)
Filament13.5 V @ 0.15 mA
Construction
Primary TypeTriode
EnvelopeT6-1/2
Base MaterialSmall-Button Noval
Sections2
Filament / Heater
Heater NotesHeater will withstand momentary excursions from 11.0 to 16.0 volts.
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation2.75 W
Grid 1 Voltage-55 V
H-C Voltage100 V
Audio Performance
Key Features
- 9-Pin Miniature
- Mobile-Communications Equipment
- 6-Cell Storage-Battery Systems
- High-Mu
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 250 V | 5500 | 11000 | 60 | 10 mA |
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