• Country
• Germany

• Manufacturer / Brand
• Nora, Aron, Heliowatt; Berlin

• Year
• 1930–1935

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 8066

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

• Number of Tubes
• 4

• Valves / Tubes
• RES094 or H406D RE034 or W406 RE034 or W406 RES164 or L416D

• Main principle
• TRF with regeneration; 1 Special; 2 AF stage(s)

• Tuned circuits
• 2 AM circuit(s)

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

• Power type and voltage
• Storage and/or dry batteries / 100 & 60 & 4 Volt

• Loudspeaker
• Magnetic loudspeaker (reed) of high quality (4 magnet poles).

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: S4K - Nora, Aron, Heliowatt; Berlin

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 380 x 200 x 380 mm / 15 x 7.9 x 15 inch

• Notes

• [501, 569]

  Preis ohne Röhren, zusätzlich Röhrensatz Preis: 47,- RM

  Batterien und Rahmenantenne im Koffer eingebaut.

  Mehrpreis Spezial-Hochleistungs-Anodenbatterie: 4,50 RM

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

• Price in first year of sale
• 298.50 RM +

• Source of data
• Katalog Radio-Zentrale Prohaska 1930/31 (dick) / Radiokatalog Band 1, Ernst Erb

• Circuit diagram reference
• Lange + FS-Bestückungstabellen

• Mentioned in
• Radio-Zentrale Prohaska 1933/34

• Picture reference
• Das Modell ist im «Radiokatalog» (Erb) abgebildet.

• Other Models

• Here you find 633 models, 556 with images and 342 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Nora, Aron, Heliowatt; Berlin