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

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Tube-number record

ML-7003

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BrandMachlett
ClassShielded Grid Triode
BaseSpecial / none
Filament6 V @ 60000 mA

Construction

Primary TypeTriode
EnvelopeGlass-to-metal
Base MaterialMetal
Sectionssingle

Filament / Heater

Heater NotesCathode warm-up time 10 minutes. Heater starting current maximum 300000 mA.

Absolute Maximum Ratings

Plate Voltage45000 V
Plate Dissipation3000 W
Grid 1 Voltage-600 V
Cathode Current90000 mA

Audio Performance

Key Features
  • Shielded-grid triode
  • Unipotential, oxide-coated cathode
  • Forced-air cooled anode
  • Protects cathode/grid from transient arcs
  • Low grid-plate capacitance

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pulse Modulator (Operation 1)35000 V——20040000 mA
Pulse Modulator (Operation 2)40000 V——20080000 mA

Application Notes

Primarily designed for switch tube service in hard-tube pulse modulators for radar and similar applications.

Filters

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