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

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SD 3 vacuum tube outline illustration

Tube-number record

SD 3

0 archive entries

SD 3 is a tube type in the TubeDatabase archive (class: UKW-Sende-Triode). Recorded specifications: brand Telefunken, construction Triode, socket Special / none, maximum plate voltage 300 V, and maximum plate dissipation 6 W. The archive does not yet hold a photographed example of this type.

BrandTelefunken
ClassUKW-Sende-Triode
BaseSpecial / none
Filament1.9 V @ 0.66 mA

Construction

Primary TypeTriode
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesIndirekt geheizt; Serienschaltung von Röhren nur zulässig mit Parallelwiderständen.

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard150 V3500—3010 mA
Anodenruhestrom10 V———15 mA

Application Notes

Zur Vermeidung von Störschwingungen ist die Gittervorspannung stets durch Widerstand in der Kathodenleitung und nicht durch Widerstand in der Gitterzuleitung zu erzeugen.

Datasheets

Datasheet: SD3.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 Dissipation6 W
    Cathode Current50 mA
    H-C Voltage35 V

    Audio Performance

    Key Features
    • Oxydkathode
    • UKW-Sende-Triode
    • Wavelength down to 40cm