F-895
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BrandFederal Telephone and Radio Corporation
ClassPower Triode
Construction
Primary TypeTriode
EnvelopeGlass with water-cooled anode
Base MaterialMetal terminals
Sections1
Filament / Heater
MaterialPure tungsten
Absolute Maximum Ratings
Plate Voltage17000 V
Plate Dissipation40000 W
Grid 1 Voltage-3000 V
Cathode Current62000 mA
Audio Performance
Power Output70000 W
Key Features
- Water-cooled anode
- Three-phase AC filament excitation
- Pure tungsten cathode
- 40 kW dissipation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B Modulator (Two Tubes) | 10000V | - | - | 37 | 11500mA |
| Class C Telegraphy | 17000V | - | - | 37 | 7500mA |
| Class C Plate-Modulated Telephony | 10000V | - | - | 37 | 3350mA |
Application Notes
Designed for use as a radio-frequency amplifier, oscillator, or Class B modulator. Maximum ratings apply up to 6 megacycles; operation permissible up to 25 megacycles at reduced ratings.
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