S7U

Siera; Belgien

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  • Year
  • 1936
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 98711

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 5
  • 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.
  • Details
  • Visual Tuning Indicator pre Eye
  • Power type and voltage
  • AC/DC-set / 110; 125; 145; 200; 220; 245 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 21.5 cm = 8.5 inch
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: S7U - Siera; Belgien
  • Shape
  • Tablemodel, high profile (upright - NOT Cathedral nor decorative).
  • Dimensions (WHD)
  • 390 x 460 x 275 mm / 15.4 x 18.1 x 10.8 inch
  • Notes
  • 3 Band reception:
    • LW: 725 - 1975 m.
    • BC: 198 - 585 m.
    • SW: 16 - 51 m.
    Tuning scale light bulbs type: 2 x 8045 (6,3V, 320mA) and 1 x 8043 (6,3V, 90mA).
    Loudspeaker Philips type 9602. Connectors for second loudspeaker and for pick-up. 
    Variable selectivity, anti-fading and a milliamperemeter as tuning indicator. 
    Cabinet in varnished walnut.
     
    The Siera memento 1932-1946 mentions the same tube line-up for types S7A and S7U. When fed by a DC mains, the power must pass via vibrator converter and not directly into the radio as usual with a AC/DC set.
  • Net weight (2.2 lb = 1 kg)
  • 15 kg / 33 lb 0.6 oz (33.04 lb)
  • Price in first year of sale
  • 2,950.00 BFr
  • Mentioned in
  • - - Manufacturers Literature (Siera memento of tubes and models 1932-1946)
  • Literature/Schematics (1)
  • -- Original-techn. papers.
  • Author
  • Model page created by John Koster. See "Data change" for further contributors.

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