• Country
• Germany

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

• Year
• 1936/1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 7900

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

• Number of Tubes
• 4

• Valves / Tubes
• KF4 KC1_p8 KF4 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: Koffer K26 - Nora, Aron, Heliowatt; Berlin

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

• Dimensions (WHD)
• 320 x 320 x 220 mm / 12.6 x 12.6 x 8.7 inch

• Notes

• Akku 5 kg (!); Kunstleder blau

  Abgleich wie beim Nora B26

• Net weight (2.2 lb = 1 kg)
• 6.6 kg / 14 lb 8.6 oz (14.537 lb)

• Price in first year of sale
• 248.00 RM

• Source of data
• HandB.d.d.Rundfunk-Handels 1936/37 / Radiokatalog Band 1, Ernst Erb

• Circuit diagram reference
• Lange+Schenk+FS-Röhrenbestückung

• Mentioned in
• Radios von gestern, 1. Auflage

• 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