Tube-number record
F-7C25
0 archive entries
F-7C25 is a tube type in the TubeDatabase archive (class: Power Triode). Recorded specifications: brand Federal Telephone and Radio Company, year 1953, construction Triode, maximum plate voltage 5000 V, and maximum plate dissipation 2500 W. The archive does not yet hold a photographed example of this type.
BrandFederal Telephone and Radio Company
ClassPower Triode
Construction
Primary TypeTriode
EnvelopeGlass/Metal
Sections1
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage5000 V
Plate Dissipation2500 W
Grid 1 Voltage-1500 V
Audio Performance
Key Features
- Wide spacing between elements
- No internal insulators
- Air-cooled anode
- Industrial application suitability
- Thoriated tungsten cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Power Amplifier Class C Telegraphy (1) | 4000 V | — | — | 25 | 1000 mA |
| RF Power Amplifier Class C Telegraphy (2) | 4500 V | — | — | 25 | 1200 mA |
| RF Power Amplifier Class C Telegraphy (3) | 5000 V | — | — | 25 |
Application Notes
Designed for use in industrial applications meeting severe conditions of radio frequency heating service. Maximum ratings apply up to 30 megacycles.
0 results