Tube-number record
ML-8464
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BrandMachlett
ClassShielded-grid triode
BaseSpecial / none
Filament5.5 V @ 20 mA
Construction
Primary TypeTriode
EnvelopeMetal-ceramic
Base MaterialLiquid-cooled anode
Sections1
Filament / Heater
MaterialOxide-coated
Warm-up Time10s
Heater NotesHeater starting current maximum 80 A
Absolute Maximum Ratings
Plate Voltage25000 V
Plate Dissipation1500 W
Grid 1 Voltage-600 V
Cathode Current25000 mA
Audio Performance
Key Features
- Ruggedized
- Shielded Grid
- Unipotential oxide-coated cathode
- Liquid-cooled anode
- Flat plate-current curves
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pulse Modulator Condition 1 | 23000 V | — | — | 200 | 20000 mA |
| Pulse Modulator Condition 2 | 22500 V | — | — | 200 | 10000 mA |
Application Notes
Designed as a switch tube in hard-tube pulse modulators for radar. Shielded grid protects cathode and control grid from transient arcs.
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