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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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ECL 81 vacuum tube outline illustration

Tube-number record

ECL 81

0 archive entries

ECL 81 is a tube type in the TubeDatabase archive (class: Triode-Endpentode). Recorded specifications: brand VEB Funkwerk Erfurt, year 1956, construction Pentode, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 6.5 W. The archive does not yet hold a photographed example of this type.

BrandVEB Funkwerk Erfurt
ClassTriode-Endpentode
BaseNoval (B9A)
Filament6.3 V @ 600 mA

Construction

Primary TypePentode
EnvelopeGlass
Sections2

Filament / Heater

Absolute Maximum Ratings

Plate Voltage250 V
Plate Dissipation6.5 W

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Triode Section (Static)150 V1600—561.3 mA
Pentode Section (Class A)200 V875022000—30 mA

Application Notes

Zur Vermeidung von UKW-Störschwingungen wird empfohlen, unmittelbar vor das Steuergitter einen Schutzwiderstand von mindestens 1000 Ohm zu legen.

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    Grid 2 Voltage
    250 V
    Grid 1 Voltage-1.3 V
    Cathode Current45 mA
    H-C Voltage75 V

    Audio Performance

    Typical THD10%
    Power Output2.4 W
    Key Features
    • Universelle Verbundröhre
    • Fernsehempfänger