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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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ML-8549 vacuum tube outline illustration

Tube-number record

ML-8549

0 archive entries

ML-8549 is a tube type in the TubeDatabase archive (class: Super Power Triode). Recorded specifications: brand Machlett, year 1964, construction Triode, base Coaxial water-cooled, socket Coaxial, maximum plate voltage 65000 V, and maximum plate dissipation 500000 W. The archive does not yet hold a photographed example of this type.

BrandMachlett
ClassSuper Power Triode
BaseCoaxial

Construction

Primary TypeTriode
EnvelopeCeramic-metal
Base MaterialCoaxial water-cooled
SectionsSingle

Filament / Heater

MaterialThoriated-tungsten

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class C Telephony (Cathode Drive)15000 V——2090000 mA
Class C Telegraphy25000 V——20115000 mA

Application Notes

When used as a switch tube in hard-tube pulse modulators, it can deliver more than 60 Mw pulse output. Adequate rayproof shielding for x-rays must be provided.

Filters

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Manufacturers

Brands

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    Plate Voltage65000 V
    Plate Dissipation500000 W
    Grid 1 Voltage-5000 V
    Cathode Current1200000 mA

    Audio Performance

    Key Features
    • Water-cooled anode
    • Self-supporting thoriated-tungsten filaments
    • Low inductance coaxial terminals
    • Ion pump included