Tube-number record
F-5668
0 archive entries
F-5668 is a tube type in the TubeDatabase archive (class: Power Triode). Recorded specifications: brand Federal Telephone and Radio Company, year 1953, construction Triode, base Kovar seals, socket Special / none, maximum plate voltage 14000 V, and maximum plate dissipation 20000 W. The archive does not yet hold a photographed example of this type.
BrandFederal Telephone and Radio Company
ClassPower Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass with water-cooled anode
Base MaterialKovar seals
SectionsSingle
Filament / Heater
MaterialPure tungsten
Absolute Maximum Ratings
Plate Voltage14000 V
Plate Dissipation20000 W
Grid 1 Voltage-3000 V
Cathode Current9.4 mA
Audio Performance
Power Output17500 W
Key Features
- Water-cooled anode
- Kovar seals
- Heavy wall anode
- Designed for RF heating service
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy | 8000 V | — | — | 50 | 1600 mA |
| Class C Telegraphy | 10000 V | — | — | 50 | 1800 mA |
| Class C Telegraphy | 12000 V | — | — | 50 | 2000 mA |
Application Notes
Specifically designed for radio frequency heating service. Replaces Type F-892 with water jacket modification. Maximum ratings apply up to 5 Mc.
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