• Country
• Germany

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

• Year
• 1927–1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 3772

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); 2 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

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

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: P20 - Nora, Aron, Heliowatt; Berlin

• Notes
• Existenz fraglich, Literatur??

• Source of data
• Radiokatalog Band 1, Ernst Erb

• Mentioned in
• Funkgeschichte der GFGF (9072)

• 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