Tube-number record
ZP-1057
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ZP-1057 is a tube type in the TubeDatabase archive (class: Triode). Recorded specifications: brand General Electric, construction Triode, socket Coaxial, maximum plate voltage 1750 V, and maximum plate dissipation 300 W. The archive does not yet hold a photographed example of this type.
BrandGeneral Electric
ClassTriode
BaseCoaxial
Filament6.3 V @ 3800 mA
Construction
Primary TypeTriode
EnvelopeMetal and Ceramic
SectionsSingle
Filament / Heater
MaterialOxide-coated
Warm-up Time1s
Heater NotesRequired heater voltage for optimum life decreases with increasing frequency due to back bombardment; should not be less than 5.5 volts.
Absolute Maximum Ratings
Plate Voltage1750 V
Plate Dissipation300 W
Grid 1 Voltage-150 V
Cathode Current300 mA
Audio Performance
Power Output200 W
Key Features
- Internal feedback for CW Oscillator service
- Grounded-grid operation
- Forced-air cooled
- Metal and ceramic construction
- High efficiency radiator
- Oxide-coated cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| CW Grounded-Grid RF Oscillator (1200 MHz) | 1500 V | — | — | — | 275 mA |
Application Notes
The tube features internal feedback which eliminates the need for complicated external circuit arrangements normally required in oscillator service, simplifying cavity design for broad frequency coverage.
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