5C/450A
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ClassRF Suppressor Modulated Pentode
BaseSpecial
Construction
Primary Typepentode
Envelopeglass
Sectionssingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage3000 V
Plate Dissipation450 W
Grid 2 Voltage850 V
Cathode Current700 mA
Audio Performance
Key Features
- Thoriated tungsten filament
- Suppressor grid modulated
- Class C Operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Suppressor Modulated Carrier | 2500V | 4500 | - | 5 | 300mA |
| Class C Unmodulated | 2500V | - | - | - | 590mA |
Application Notes
It is recommended that the valve be operated in a vertical position. When operated horizontally the plane of the filament should be vertical. Free circulation of air around the bulb is essential. When operated in a confined space circulation of air by means of a fan is recommended.
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