PB 3/800
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BrandPhilips
ClassPENTODE
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage3000 V
Plate Dissipation450 W
Grid 2 Voltage600 V
Grid 1 Voltage-300 V
Cathode Current700 mA
Audio Performance
Key Features
- Thoriated tungsten cathode
- HF oscillator use
- HF amplifier use
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF class C telegraphy (Vg2 = Vg3) | 3000V | 5500 | - | - | 550mA |
| HF class C telegraphy (Vg3 = 0) | 3000V | 5500 | - | - | 465mA |
| HF class B telephony | 3000V | - | - | - | 215mA |
| HF class C suppressor grid modulation | 3000V | - | - | - | 190mA |
Application Notes
Specifically designed for high frequency class B and C operations, telegraphy and telephony including suppressor grid modulation.
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