1A4
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BrandRCA
ClassSuper-Control R-F Amplifier Pentode
BaseSmall 4-Pin
Construction
Primary TypePentode
EnvelopeST-12
SectionsSingle
Filament / Heater
MaterialFilament Type
Absolute Maximum Ratings
Plate Voltage180 V
Grid 2 Voltage67.5 V
Grid 1 Voltage-3 V
Audio Performance
Key Features
- Super-control pentode
- Battery-operated
- Low B-battery power consumption
- Remote cut-off
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier | 90V | 720 | 600000 | 425 | 2.2mA |
| RF Amplifier | 180V | 750 | 1000000 | 750 | 2.3mA |
Application Notes
Useful as a radio-frequency amplifier or intermediate-frequency amplifier in battery-operated receivers. Requires less B-battery power than type 34.
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