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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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3DA3 vacuum tube outline illustration

Tube-number record

3DA3

0 archive entries

3DA3 is a tube type in the TubeDatabase archive (class: High-Voltage Rectifier). Recorded specifications: brand General Electric, construction Diode, base Glass, socket Octal, and maximum plate voltage 30000 V. The archive does not yet hold a photographed example of this type.

BrandGeneral Electric
ClassHigh-Voltage Rectifier
BaseOctal
Filament3.15 V @ 480 mA

Construction

Primary TypeDiode
Rectifier TypeVacuum
EnvelopeT-9
Base MaterialGlass
Sections1

Filament / Heater

Warm-up Time4s

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Average Characteristics60 V———7 mA

Application Notes

Designed for use in color television receivers as the high-voltage rectifier to supply power to the anode of the picture tube.

Datasheets

Datasheet: 3DA3.pdf

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

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    Heater Notes
    Rapid warm-up heater-cathode design

    Absolute Maximum Ratings

    Plate Voltage30000 V
    Cathode Current2.2 mA

    Audio Performance

    Key Features
    • Diffusion bonded cathode
    • New rapid warm-up heater-cathode design
    • X-radiation rating
    • Internal Shielding