• Country
• Germany

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

• Year
• 1927–1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 3767

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

• Number of Tubes
• 1

• Valves / Tubes
• Pentatron-2fach or VT126_TKD

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

• Tuned circuits
• 1 AM circuit(s)

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

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Duplex Form P2a - Nora, Aron, Heliowatt; Berlin

• Shape
• Tablemodel, slant panel.

• Dimensions (WHD)
• 150 x 200 x 160 mm / 5.9 x 7.9 x 6.3 inch

• Notes

• Flachpult; 2-fach-Röhre; Spulen eingebaut. Precio en España 1927: 80 pts sin válvula. Válvula/tube : 28 pts.

  Modellname "Duplex" wird nur in Händler-Katalogen geführt.

• Net weight (2.2 lb = 1 kg)
• 1 kg / 2 lb 3.2 oz (2.203 lb)

• Price in first year of sale
• 45.00 RM

• Source of data
• Katalog Radio-Zentrale Prohaska 1928 / Radiokatalog Band 1, Ernst Erb

• Mentioned in
• Radio-Diehr, Berlin, 1928/1929 (Schaltplan)

• Literature/Schematics (1)
• Archivverlag Blatt 27NO 02H

• Literature/Schematics (2)
• 10 Jahre NORA-Radio GmbH

• 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