Tube-number record
8198/EM-778
0 archive entries
8198/EM-778 is a tube type in the TubeDatabase archive (class: Traveling Wave Tube). Recorded specifications: brand Eimac, year 1962, construction Other / special, base Metal, socket Flexible / flying leads, and maximum plate voltage 3000 V. The archive does not yet hold a photographed example of this type.
BrandEimac
ClassTraveling Wave Tube
BaseFlexible / flying leads
Filament6.3 V @ 600 mA
Construction
Primary TypeOther / special
EnvelopeCeramic and Metal
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialOxide coated
Warm-up Time60s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Power Amplifier (5.0 to 11.0 GHz) | 2900 V | — | — | — | 23 mA |
Application Notes
The EM-778 is designed to be heat sink cooled by means of the mounting available and integral with the tube and PPM structure. Helix, collector and anode are internally connected to the tube body.
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