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

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Tube-number record

6690

0 archive entries

6690 is a tube type in the TubeDatabase archive (class: Double Triode). Recorded specifications: brand Philco, construction Dual triode, socket Subminiature, maximum plate voltage 120 V, and maximum plate dissipation 1 W. The archive does not yet hold a photographed example of this type.

BrandPhilco
ClassDouble Triode
BaseSubminiature
Filament6.3 V @ 300 mA

Construction

Primary TypeDual triode
EnvelopeT-3
Sections2

Filament / Heater

Heater NotesHeater current value corrected from typical 6690 JEDEC data (OCR suggests 700ma)

Absolute Maximum Ratings

Plate Voltage120 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operation100 V48009375458 mA

Datasheets

Datasheet: 6690.pdf

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

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Brands

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    Plate Dissipation1 W
    Grid 1 Voltage-55 V
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Short subminiature
    • Medium-mu
    • Video region operation
    • Severe environmental conditions resistant
    • Mechanical shock resistant
    • High acceleration resistant