Tube-number record
LD-550B
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BrandNEC
ClassTraveling Wave Tube
BaseWaveguide
Filament6.3 V @ 600 mA
Construction
Primary TypeOther / special
EnvelopeMetal with Radiator
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialOxide Coated
Warm-up Time90s
Absolute Maximum Ratings
Plate Voltage3000 V
Plate Dissipation56 W
Grid 2 Voltage3400 V
Grid 1 Voltage-60 V
Cathode Current3 mA
Audio Performance
Key Features
- PPM Focused
- Field Replaceable
- Depressed Collector Operation
- Conduction and Natural Convection Cooling
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 7.2 GHz Typical | 1600 V | — | — | — | 33 mA |
| 7.8 GHz Typical | 1600 V | — | — | — | 33 mA |
| 8.5 GHz Typical | 1600 V | — | — | — | 33 mA |
Application Notes
Recommended to be operated in periodic permanent magnet focusing mount. Horizontal mounting preferred. Forced air cooling required if ambient exceeds 55°C.
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