• Country
• Netherlands

• Manufacturer / Brand
• Siera; Eindhoven (NL)

• Year
• 1938/1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 97133

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

• Number of Tubes
• 6

• Valves / Tubes
• EK2 EF9 EBC3 EL3 EM1 AZ1

• 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
• Alternating Current supply (AC) / 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: S51A - Siera; Eindhoven NL

• 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 can be upgraded to an AC/DC set (see type S51U) by incorporating a vibrator unit (Price: 250 BFr).
  This model is comparable with Jura TS51A and DUX V95.

• Net weight (2.2 lb = 1 kg)
• 12.6 kg / 27 lb 12.1 oz (27.753 lb)

• Price in first year of sale
• 135.00 Hfl

• Source of data
• Technisch- Commercieel - Radio Vademecum Staleman

• 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.

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

• Other Models

• Here you find 50 models, 48 with images and 20 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Siera; Eindhoven (NL)