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RS 249

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BrandTelefunken
ClassUltrakurzwellen-Triode
BaseAußenkontaktsockel
Filament12.6V @ 500mA

Construction

Primary TypeTriode
EnvelopeGlass
Base MaterialPlastic
Sectionssingle

Filament / Heater

Heater NotesHeater voltage reduced to 11.5V for operation at wavelengths < 3m

Absolute Maximum Ratings

Plate Voltage600 V
Plate Dissipation13 W

Audio Performance

Power Output12 W
Key Features
  • Oxide-coated indirectly heated cathode
  • Designed for ultra-shortwave (UKW) applications
  • Low-inductance top-bulb connections for Anode, Grid, and Cathode
  • Wavelength capability down to 1.5m

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
RF Oscillator/Amplifier600V360055552040mA

Application Notes

Anode, grid, and cathode leads are brought out through the top of the glass bulb to minimize lead inductance. Use flexible leads for these connections to avoid mechanical stress on the glass.

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