• Country
• Germany

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

• Year
• 1924/1925

• Category
• RF (Radio Frequency-) Amplifier

• Radiomuseum.org ID
• 3790

• Number of Tubes
• 1

• Valves / Tubes

• Main principle
• Radio Frequency Amplification only

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - - No sound reproduction output.

• Material
• TUBES VISIBLE, material not known.

• from Radiomuseum.org
• Model: HF-Vorkreis H1 - Nora, Aron, Heliowatt; Berlin

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 115 x 95 x 115 mm / 4.5 x 3.7 x 4.5 inch

• Notes
• rund?, denn in Preisliste = eckig!, offen

• Net weight (2.2 lb = 1 kg)
• 1.1 kg / 2 lb 6.8 oz (2.423 lb)

• 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