S51U

Siera; Belgien

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  • Year
  • 1938/1939
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 98813

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superheterodyne (common); ZF/IF 128 kHz; 2 AF stage(s)
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and Short Wave.
  • Power type and voltage
  • AC/DC-set / AC: 110; 125; 145; 200; 220; 245 / DC: ? Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 21.5 cm = 8.5 inch
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: S51U - Siera; Belgien
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 520 x 300 x 235 mm / 20.5 x 11.8 x 9.3 inch
  • Notes
  • 3 Band reception:
    • LW: 708 - 2000 m.
    • BC: 186 - 585 m.
    • SW: 16,7 - 51 m.
    Tuning scale light bulbs type: 2 x 8045 (6,3V, 320mA).
    Loudspeaker Philips type 9636. Connectors for second loudspeaker and for pick-up. Tone control.

    This model is virtually an upgraded type S51A with vibrator incorporated. The price of 2100 BFr is that of S51A (1850 BFr) plus vibrator (250 BFr).

    The original folder specifies DC mains supply for type U, while the configuration is suitable for  operation on AC/DC mains.

    Until now, no S51U radio has been found. It is possible that the model type is S51AU as written in the Siera memento.

  • Price in first year of sale
  • 2,100.00 BEF
  • Mentioned in
  • - - Manufacturers Literature (Siera memento of tubes and models 1932-1946)
  • Literature/Schematics (1)
  • -- Original prospect or advert (Siera Radio Modèles 1939)
  • Literature/Schematics (2)
  • -- Original-techn. papers. (from model Siera S51A)
  • Author
  • Model page created by John Koster. See "Data change" for further contributors.

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