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BrandFederal Telephone and Radio Company
ClassTraveling Wave Tube
BaseB5-57
Filament6.3V @ 2500mA

Construction

Primary TypeTraveling Wave Tube
EnvelopeMetal
SectionsHelical type wave propagating structure

Filament / Heater

Heater NotesUnipotential oxide impregnated cathode

Absolute Maximum Ratings

Plate Voltage1500 V
Plate Dissipation150 W
Grid 1 Voltage-250 V

Audio Performance

Power Output10 W
Key Features
  • All metal envelope
  • Helical wave propagating structure
  • Forced air cooled
  • CW service
  • Integral matching circuit

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Power Amplifier1200V---70mA
Linear Amplifier1150V---67mA

Application Notes

The focusing electrode is a remote cutoff grid suitable for gain control (approx 30 db range). Shell current is the difference between cathode and collector current and should be minimized. Collector should operate 100-200V positive with respect to shell.

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