1F4
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BrandSylvania
ClassPower Pentode
Base5-pin
Construction
Primary TypePentode
EnvelopeST-14
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage180 V
Grid 2 Voltage180 V
Audio Performance
Typical THD5%
Power Output0.31 W
Key Features
- High sensitivity
- Low filament consumption
- Designed for battery receivers
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 (90V) | 90V | 1400 | 240000 | - | 4mA |
| Class A1 (135V) | 135V | 1700 | 200000 | - | 8mA |
| Class AB1 Push-Pull (Per Tube) | 180V | - | - | - | 10.5mA |
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