• Country
• Belgium

• Manufacturer / Brand
• Siera; Belgien

• Year
• 1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 98641

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

• Number of Tubes
• 6

• Valves / Tubes
• FC13 or CK1 VP13A or CF2 2D13 or CB1 SP13 or CF7 Pen26 or CL2 UR1 or CY1

• Conflicting model year with tube data.
• The model date contradicts tube dates. [ CF7 (1935)]

• Main principle
• Superheterodyne (common); ZF/IF 104 kHz

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• AC/DC-set / 110-240 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 17 cm = 6.7 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: S34U - Siera; Belgien

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 540 x 300 x 220 mm / 21.3 x 11.8 x 8.7 inch

• Notes
• 2 Band reception:
  • LW: 760 - 1900 m.
  • BC: 200 - 550 m.
  Tuning scale light bulbs type: 2 x 8066 (9V, 240mA).
  Loudspeaker Philips type 4281. Connectors for second loudspeaker and for pick-up. 
  S34U has a varnished walnut and marquetry cabinet.
   
  The model with CF7 instead of SP13 appeared only in 1935.
  By equivalence with S35U, this model may have a C1 current regulator for the filaments.

  Attention: chassis connected to the mains !

  A schematic equivalence with Philips 521U exists.

• Net weight (2.2 lb = 1 kg)
• 7.7 kg / 16 lb 15.4 oz (16.96 lb)

• Price in first year of sale
• 1,650.00 BEF

• Mentioned in
• - - Manufacturers Literature (Siera memento of tubes and models 1932-1946)

• Author
• Model page created by John Koster. See "Data change" for further contributors.

• Other Models

• Here you find 474 models, 434 with images and 212 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Siera; Belgien