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
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate 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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