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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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Tube-number record

7496

0 archive entries

7496 is a tube type in the TubeDatabase archive (class: Vari-mu R.F. Pentode). Recorded specifications: brand Brimar, construction Pentode, base Glass, socket Miniature 7-pin (B7G), maximum plate voltage 330 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.

BrandBrimar
ClassVari-mu R.F. Pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 0.3 mA

Construction

Primary TypePentode
EnvelopeT-5 1/2
Base MaterialGlass
SectionsSingle

Filament / Heater

Heater NotesPure tungsten heater designed for frequent switching

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier250 V440010000002411 mA

Application Notes

The 7496 is designed for R.F. and I.F. applications where high reliability and stable characteristics are required. Special cathode alloy prevents interface resistance growth during long cut-off periods.

Datasheets

Datasheet: 7496.pdf

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

Filters

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Manufacturers

Brands

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    Plate Voltage330 V
    Plate Dissipation3 W
    Grid 2 Voltage135 V
    H-C Voltage150 V

    Audio Performance

    Key Features
    • Rugged electrode construction
    • Semi-automatic assembly techniques
    • Low catastrophic failure rate
    • Cathode interface resistance inhibition
    • Pure tungsten heater
    • Low inter-electrode capacitance change