Tube-number record
6F4
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6F4 is a tube type in the TubeDatabase archive (class: Oscillator Triode). Recorded specifications: brand RCA, year 1944, construction Triode, base Acorn Type, socket 7-pin (non-miniature), maximum plate voltage 150 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassOscillator Triode
Base7-pin (non-miniature)
Filament6.3 V @ 0.225 mA
Construction
Primary TypeTriode
EnvelopeT-44
Base MaterialAcorn Type
Sections1
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation2 W
Grid 1 Voltage-50 V
Cathode Current20 mA
H-C Voltage80 V
Audio Performance
Power Output1.8 W
Key Features
- Acorn Type
- Designed for frequencies up to 1200 Mc
- Radial Pin Arrangement
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 80 V | 5800 | 2900 | 17 | 13 mA |
| Class C Telegraphy | 150 V | — | — | — | 20 mA |
Application Notes
Approximately 45 milliwatts can be obtained when the 6F4 is used at 1200 Megacycles as an oscillator with 100 volts on plate.
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