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Ondolina 28 3rd gen.

Ondolina 28; SBR Société Belge (ID = 1357944) Radio Ondolina 28; SBR Société Belge (ID = 1594589) Radio
Ondolina 28; SBR Société Belge (ID = 1594590) Radio Ondolina 28; SBR Société Belge (ID = 1594591) Radio
Ondolina 28; SBR Société Belge (ID = 1594593) Radio Ondolina 28; SBR Société Belge (ID = 1594594) Radio
Ondolina 28; SBR Société Belge (ID = 1594595) Radio
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Ondolina 28; SBR Société Belge (ID = 1357944) Radio
SBR Société Belge: Ondolina 28 [Radio] ID = 1357944 586x449
Select picture or schematic to display from thumbnails on the right and click for download.
For model Ondolina 28 3rd gen., SBR Société Belge Radio-Electrique, Bruxelles:
With kind permission of SBR museum Belgium 'eeuwfeestpaleisje'
 
Country:  Belgium
Manufacturer / Brand:  SBR Société Belge Radio-Electrique, Bruxelles
Year: 1928 perfect model Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: A425 A409 A415 B403 or B405
Main principle TRF with regeneration; 1 AF stage(s); Neutrodyne
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage Storage and/or dry batteries / 4 & 120 & -15 Volt
Loudspeaker - This model requires external speaker(s).
Power out
from Radiomuseum.org Model: Ondolina 28 [3rd gen.] - SBR Société Belge Radio-
Material Wooden case
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

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



All listed radios etc. from SBR Société Belge Radio-Electrique, Bruxelles
Here you find 698 models, 646 with images and 367 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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