• Country
• Germany

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

• Year
• 1932–1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 7943

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

• Number of Tubes
• 3

• Valves / Tubes
• REN904 RE134 or RES164 RGN354

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

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Alternating Current supply (AC) / 120-240 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: W20 - Nora, Aron, Heliowatt; Berlin

• Dimensions (WHD)
• 400 x 330 x 160 mm / 15.7 x 13 x 6.3 inch

• Notes

• Mehrpreis RES164: 4,90 RM

  Preis mit Röhren 1933/34 gesenkt: 79,- RM

• Price in first year of sale
• 85.50 RM +

• Source of data
• Radio-Zentrale Prohaska 1933/34 / Radiokatalog Band 1, Ernst Erb

• Circuit diagram reference
• FS-Bestückungstabelle (aber Fehler)

• Mentioned in
• -- Original prospect or advert (1932)

• Literature/Schematics (1)
• Katalog Radio-Zentrale Prohaska 1932/33

• 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