Tube-number record
ML-8464
0 archive entries
ML-8464 is a tube type in the TubeDatabase archive (class: Shielded-grid triode). Recorded specifications: brand Machlett, year 1964, construction Triode, base Liquid-cooled anode, socket Special / none, maximum plate voltage 25000 V, and maximum plate dissipation 1500 W. The archive does not yet hold a photographed example of this type.
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
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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