Tube-number record
308
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ClassDiode-Pentode
BaseLoctal
Construction
Primary TypeMulti-section
EnvelopeGlass
SectionsDual (Diode + Pentode)
Filament / Heater
Absolute Maximum Ratings
Plate Voltage90 V
Grid 2 Voltage90 V
Audio Performance
Key Features
- Battery-operated
- Loctal base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 90 V | 575 | 700000 | — | 1.2 mA |
Application Notes
Commonly used in portable battery-operated radio receivers as a combined detector, AVC, and audio amplifier.
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