Ondolina 412 DC 110V

SBR Société Belge Radio-Electrique, Bruxelles

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  • Year
  • 1930
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 228702

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • TRF (Tuned-Radio-Frequency but use of regeneration unknown); Neutrodyne
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Direct Current supply (DC) / 110 Volt
  • Loudspeaker
  • Magnetic loudspeaker (reed) generic.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Ondolina 412 [DC 110V] - SBR Société Belge Radio-
  • Shape
  • Tablemodel, high profile (upright - NOT Cathedral nor decorative).
  • Notes
    • Internally, the radio is divided into 2 sections: the radio in the bottom half and the power supply in the top half of the housing.
    • In case of the batteries version, the power supply section is left empty to make room for the (storage) batteries. This version has a control voltmeter with a push button on the left side for the filaments.
    • The AC mains version has an "Oxymétal"1 rectifier. There is a rheostat, a push button and a voltmeter on the primary side of the mains transformer to compensate for voltage changes and a current regulator to keep the filament current constant.
    • The DC mains 110V version and the DC mains 220V version have an internal resistor block to adjust to the mains voltage and a rheostat with a push button and a voltmeter to compensate for voltage changes; also a current regulator to keep the filament current constant.
    • There is a tone control on the backside.
    • There is an alternative tubeset from Dario: R81 , R76 , R76 , R77.
    • All versions of this radio still need an internal 15V negative grid voltage battery ("C" battery).
    • The soffit lamp on the back of the power supply is a current regulator.

    1 "Oxymétal" (copper oxyd) rectifier.

  • Author
  • Model page created by Dirk Bladt. See "Data change" for further contributors.

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