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
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pulse Modulator (Operation 1) | 35000 V | — | — | 200 | 40000 mA |
| Pulse Modulator (Operation 2) | 40000 V | — | — | 200 | 80000 mA |
Application Notes
Primarily designed for switch tube service in hard-tube pulse modulators for radar and similar applications.