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

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Tube-number record

SHIELDED-GRID TRIODE

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BrandMachlett
ClassSwitch Tube
Filament6 V @ 60 mA

Construction

Primary TypeTriode
EnvelopeCeramic-Metal
SectionsSingle

Filament / Heater

Heater NotesStarting current maximum 300 Amps. Warmup time 10 minutes.

Absolute Maximum Ratings

Plate Voltage16000 V
Plate Dissipation5000 W
Grid 1 Voltage-300 V
Cathode Current75000 mA

Audio Performance

Key Features
  • Shielded-grid design
  • Unipotential oxide-coated cathode
  • Low grid-plate capacitance
  • Transient arc protection

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pulse Modulator/Amplifier8000 V——12510000 mA
Pulse Modulator/Amplifier16000 V——12555000 mA

Application Notes

Designed primarily to operate as switch tubes in hard-tube pulse modulators for radar and similar applications. Capable of 150 kW pulse output power.

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