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

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CAT2/1 vacuum tube outline illustration

Tube-number record

CAT2/1

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CAT2/1 is a tube type in the TubeDatabase archive (class: Transmitting Triode). Recorded specifications: brand Marconi, construction Triode, base Metal, socket Special / none, maximum plate voltage 10000 V, and maximum plate dissipation 20000 W. The archive does not yet hold a photographed example of this type.

BrandMarconi
ClassTransmitting Triode
BaseSpecial / none

Construction

Primary TypeTriode
EnvelopeMetal/Water-cooled
Base MaterialMetal
SectionsSingle

Filament / Heater

MaterialPure Tungsten

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
HF Power Amplifier Class C Telegraphy10000 V200001050215600 mA

Application Notes

Anode voltage must be reduced at high frequencies: 100% at 50 Mc/s, 68% at 75 Mc/s, and 60% at 100 Mc/s. Filament voltage should be reduced to half during standby periods longer than 5 minutes.

Datasheets

Datasheet: CAT21.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    Plate Voltage10000 V
    Plate Dissipation20000 W

    Audio Performance

    Key Features
    • Water-cooled anode
    • Pure tungsten filament
    • VHF operation up to 100 Mc/s
    • Forced air cooling for seals