5851
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BrandNational Union
ClassBeam Pentode
BaseSubminiature Button 8-Pin
FilamentV @ mA
Construction
Primary Typepentode
EnvelopeT-3
Sections1
Filament / Heater
Materialoxide coated
Absolute Maximum Ratings
Plate Voltage180 V
Plate Dissipation1.5 W
Grid 2 Voltage135 V
Grid 1 Voltage-80 V
Cathode Current20 mA
Audio Performance
Typical THD10%
Power Output0.65 W
Key Features
- Ruggedized
- Subminiature
- Filamentary Cathode
- Center-tapped Filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 125V | 1600 | 175000 | - | 5.5mA |
| Doubler Operation at 400 MC | 125V | - | - | - | 8mA |
Application Notes
Designed for rugged applications in military service. Tested as a frequency doubler at 400 MHz. Tube leads may be soldered directly or used in Cinch socket #486929.
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