• Year
  • 1938/1939
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 98821

 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: S53U - Siera; Belgien
  • Shape
  • Tablemodel with Push Buttons.
  • Dimensions (WHD)
  • 535 x 355 x 230 mm / 21.1 x 14 x 9.1 inch
  • Notes
  • 3 Band reception:
    • LW: 720 - 2000 m.
    • BC: 195 - 585 m.
    • SW: 16,7 - 51 m.
    Tuning scale light bulbs type: 3 x 8045 (6,3V, 320mA). The booklet "Siera memento of tubes and models 1932-1946" mentions 3 light bulbs for this radio, where the schematic and Staleman mentions only 2.
     
    Some other properties:
    • Loudspeaker Philips type 9602, having an extra cone to reduce the beaming effect at high frequencies.
    • Connectors for second loudspeaker and for pick-up.
    • Variable selectivity coupled to the tone control.
    • Eight preselection buttons and manual tuning.
    • AF feedback circuitry to reduce distortion.

    This model is an upgraded type S53A with vibrator convertor incorporated. The price of 3000 BEF is that of S53A (2750 BEF) plus vibrator (250 BEF).

    This model is comparable with Philips 750U.

    Until now, no S53U radio has been found. It is possible that the model type is S53AU as written in the Siera memento.

  • Price in first year of sale
  • 3,000.00 BEF
  • Mentioned in
  • - - Manufacturers Literature (Siera memento of tubes and models 1932-1946)
  • Literature/Schematics (1)
  • -- Original-techn. papers. (from model S51A)
  • Author
  • Model page created by John Koster. See "Data change" for further contributors.

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