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

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ECH 8000 vacuum tube outline illustration

Tube-number record

ECH 8000

0 archive entries

ECH 8000 is a tube type in the TubeDatabase archive (class: Remote cutoff heptode with triode). Recorded specifications: brand TELEFUNKEN, construction Multi-section, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1.1 W. The archive does not yet hold a photographed example of this type.

BrandTELEFUNKEN
ClassRemote cutoff heptode with triode
BaseNoval (B9A)
Filament6.3 V @ 320 mA

Construction

Primary TypeMulti-section
EnvelopeGlass
SectionsHeptode, Triode

Filament / Heater

Heater NotesIndirectly heated, parallel supply

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Heptode as RF/IF amplifier250 V5000600000208 mA
Triode section (Measuring values)100 V4200—1811 mA
Heptode as mixer250 V1500700000—4 mA

Datasheets

Datasheet: ECH8000.pdf

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

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Manufacturers

Brands

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    Plate Dissipation1.1 W
    Grid 2 Voltage300 V
    Cathode Current20 mA
    H-C Voltage100 V

    Audio Performance

    Key Features
    • Reliability Factor P: 1.5/1000h
    • Long life: 10,000 hours guaranteed
    • Vibration and shock proof (2.5g continuous, 500g momentary)
    • Cathode free from interface layer