4C27
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BrandNational Union
ClassV.H.F. Coaxial Triode
BaseCoaxial
Filament6V @ 6500mA
Construction
Primary TypeTriode
EnvelopeCoaxial
Base MaterialMetal/Ceramic
SectionsSingle
Filament / Heater
Heater NotesOxide coated unipotential cathode
Absolute Maximum Ratings
Plate Voltage8000 V
Plate Dissipation150 W
Grid 1 Voltage-1000 V
Audio Performance
Key Features
- Pulsed V.H.F. oscillator
- 200 mc to 600 mc range
- Integral radiator
- Oxide coated unipotential cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Oscillator, Plate Pulsed | 8000V | - | - | 23 | - |
Application Notes
Designed particularly for use as a pulsed V.H.F. oscillator in the 200 mc. to 600 mc. range. One tube will deliver 50 kw peak power.
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