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RS 389

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BrandTELEFUNKEN
ClassSendepentode
BaseRS 242 spec
Filament12.6V @ 670mA

Construction

Primary TypePentode
EnvelopeGlass
Sections1

Filament / Heater

Heater NotesIndirectly heated oxide cathode

Absolute Maximum Ratings

Plate Voltage450 V
Plate Dissipation12 W
Grid 2 Voltage200 V

Audio Performance

Power Output12 W
Key Features
  • Indirekt geheizt
  • Low capacitance
  • Ultra-short wave compatible

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Standard-5000--50mA

Application Notes

Suitable for oscillator stages (with or without crystal), RF amplification, and frequency multiplication stages. The suppressor grid (G3) is internally connected to the cathode.

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