• Country
• Belgium

• Manufacturer / Brand
• Siera; Belgien

• Year
• 1943 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 225900

• Number of Tubes
• 6

• Valves / Tubes
• ECH21 ECH21 EBL21 EBL21 EM4 AZ1

• Main principle
• Superheterodyne (common); 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 145; 200; 220; 245 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 24 cm = 9.4 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: S172 - Siera; Belgien

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

• Dimensions (WHD)
• 613 x 374 x 245 mm / 24.1 x 14.7 x 9.6 inch

• Notes
• Tuning scale light bulbs type: unknown but 6,3 Volt certainly.
  Connectors for second loudspeaker and for pick-up. 
  Push-pull output stage. Chassis divided into 2 parts. Variable bandwidth with switch.
   
  The radio is for AC mains and is prepared for DC connecting a vibrator convertor.
   
  Comparable with Jura 172X, Mediator M163AX and Philips 925X-39. 

• Author
• Model page created by Timo Rantasaari. See "Data change" for further contributors.

• Other Models

• Here you find 456 models, 414 with images and 188 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Siera; Belgien