• Year
  • 1928
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 228301

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • TRF with regeneration; 1 AF stage(s); Neutrodyne
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries / 4 & 120 & -15 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Ondolina 28 [3rd gen.] - SBR Société Belge Radio-
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
    • This is the first SBR radio where the tubes are not visible on the outside.
    • The retail price is without the tubes.
    • There are 3 generations known to exist:
      • Generation 1: has a feedback1 regulator, no volume switch, and the switch for the scale lamps is just under the lid;
      • Generation 2: has a feedback1 regulator, has a volume switch, and initially the swith for the scale lamps is still just under the lid, then later it is on the frontpanel;
      • Generation 3: has a feedback1 regulator, has a volume regulator, and the switch for the scale lamps is on the frontpanel.
    • All generations are fed via connectors on the backpanel with a 4V and a 120V (storage) battery.
    • A separate internal battery for negative grid voltage is always present, even when fed with a power supply.
    • There is an alternative tubeset: HL410, 2x L410, P425.
    • The radio could be used with a M30 power supply, but also with a M35 power supply when it was converted to be used with a Réseau2 tubeset E430, E409 or E415, E415, B403 or B405.

    1 Feedback = reaction (regenerative principle).
    2 Réseau tubes: from the French word "Réseau" = powergrid. Tubes that can be heated with AC current in contrast with battery tubes that are heated with DC current.

  • Price in first year of sale
  • 2,560.00 BFr
  • Author
  • Model page created by Dirk Bladt. See "Data change" for further contributors.

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