• Country
• Germany

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

• Year
• 1936/1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 7883

• Number of Tubes
• 4

• Valves / Tubes
• KF4 KF4 KC1_p8 KL2

• Main principle
• TRF without 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+2 Volt

• Loudspeaker
• Magnetic loudspeaker (reed) of high quality (free mooving - only possible past 1931).

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

• from Radiomuseum.org
• Model: Kofferradio K424B - Nora, Aron, Heliowatt; Berlin

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

• Dimensions (WHD)
• 320 x 320 x 210 mm / 12.6 x 12.6 x 8.3 inch

• Notes
• Eisenkernspulen. Rahmenantenne und Lautsprecher im aufklappbaren Deckel. Einknopfbedienung. Preis einschliesslich Röhren und Batterien.

• Net weight (2.2 lb = 1 kg)
• 11.6 kg / 25 lb 8.8 oz (25.551 lb)

• Price in first year of sale
• 248.00 RM

• Source of data
• Radiokatalog Band 1, Ernst Erb

• Mentioned in
• Fortschritte der Funktechnik und ihrer Grenzgebiete (8 Bände) (Funkschau Nr.13 1936)

• 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