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BrandPhilips
ClassUHF Medium-Mu Triode
BasePencil-type terminals
Filament6.3V @ 280mA
Construction
Primary TypeTriode
EnvelopePencil with external radiator
SectionsSingle
Filament / Heater
Heater NotesIndirect heating; Standby 6.3V, Transmitting 6.0V
Absolute Maximum Ratings
Plate Voltage400 V
Plate Dissipation13 W
Grid 1 Voltage-100 V
Cathode Current70 mA
H-C Voltage90 V
Audio Performance
Key Features
- External anode radiator
- Grounded grid service
- Pencil type structure
- UHF R.F. power amplifier and oscillator
- Operation without pressurized chambers up to 20 km
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical characteristics | 200V | 7000 | 3857 | 27 | 27mA |
| H.F. class C power amplifier (ICAS) 500 Mc/s | 350V | - | - | - | 40mA |
| H.F. class C oscillator (ICAS) 500 Mc/s | 350V | - | - | - | 40mA |
Application Notes
To keep the anode seal temperature below 175 °C, forced air cooling may be required under unfavorable conditions; otherwise, a radiator and heat-conducting connector are sufficient.
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