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Tube Database (7,341 tube types · 1,270 archive entries)

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Tube-number record

EM-779

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BrandEimac (Eitel-McCullough, Inc.)
ClassTraveling Wave Tube
BaseFlexible / flying leads
Filament6.3 V @ 600 mA

Construction

Primary TypeOther / special
EnvelopeCeramic and Metal
Base MaterialMetal
SectionsSingle

Filament / Heater

Heater NotesUnipotential oxide coated cathode; Minimum heating time 60 seconds.

Absolute Maximum Ratings

Plate Voltage3000 V
Grid 1 Voltage-40 V
Cathode Current25 mA

Audio Performance

Power Output1 W
Key Features
  • Ruggedized
  • Ceramic and metal construction
  • Periodic permanent magnet focused
  • Temperature compensated magnets
  • Designed for airborne applications

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Saturated CW2950 V———23 mA

Application Notes

Helix, collector, and anode are internally connected to the tube body. Cooling via passive heat sink.

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