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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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ECF 86 vacuum tube outline illustration

Tube-number record

ECF 86

0 archive entries

ECF 86 is a tube type in the TubeDatabase archive (class: Triode Pentode). Recorded specifications: brand Mazda Belvu, year 1968, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.

BrandMazda Belvu
ClassTriode Pentode
BaseNoval (B9A)
Filament6.3 V @ 390 mA

Construction

Primary TypeMulti-section
EnvelopeA22-2
Base MaterialGlass
Sections2

Filament / Heater

Absolute Maximum Ratings

Plate Voltage250 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode170 V120003500007010 mA
Triode100 V5700—1714 mA

Filters

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Manufacturers

Brands

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    Plate Dissipation
    2 W
    Grid 2 Voltage150 V
    Cathode Current18 mA
    H-C Voltage100 V

    Audio Performance

    Key Features
    • V.H.F. frequency changer
    • Low noise
    • Indirectly heated cathode