• Country
• Belgium

• Manufacturer / Brand
• SBR Société Belge Radio-Electrique, Bruxelles

• Year
• 1950

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 235409

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

• Number of Tubes
• 7

• Valves / Tubes
• ECH41 6SG7 6SQ7 6AD7G 6E5 6F6G 5Y3GT

• Main principle
• Superheterodyne (common); ZF/IF 484 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and more than two Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 110; 130; 150; 220; 240 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 24.3 cm = 9.6 inch

• Power out
• 11 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Ariadne 991A [7 tubes] - SBR Société Belge Radio-

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

• Dimensions (WHD)
• 565 x 376 x 290 mm / 22.2 x 14.8 x 11.4 inch

• Notes

• Wavebands:

  • 13,5 - 23 m
  • 22 - 37 m
  • 36 - 53 m
  • 180 - 295 m
  • 285 - 570 m
  • 1000 - 2000 m

  Push-pull output stage with tubes 6F6G and 6AD7G.
  Dial scale print: "Metagra S.A. Gand" and "Plan 29-488".

  There is another model 991A with 8 tubes.

• Net weight (2.2 lb = 1 kg)
• 14 kg / 30 lb 13.4 oz (30.837 lb)

• Mentioned in
• Technisch- Commercieel - Radio Vademecum Staleman

• Author
• Model page created by Dirk Bladt. See "Data change" for further contributors.

• Other Models

• Here you find 718 models, 666 with images and 393 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from SBR Société Belge Radio-Electrique, Bruxelles