Tube-number record
237
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ClassTriode
Base5-pin
Filament6.3 V @ 0.3 mA
Construction
Primary TypeTriode
EnvelopeST-12
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation1 W
Audio Performance
Key Features
- Indirectly heated cathode
- General purpose triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250 V | 1100 | 8400 | 9.2 | 7.5 mA |
| Class A Amplifier | 90 V | 925 | 11000 | 10.2 | 2.7 mA |
Application Notes
Used as detector, amplifier, or oscillator.
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