• Country
• Austria

• Manufacturer / Brand
• Schrack (Triotron); Wien

• Year
• 1924–1926

• Category
• Radio module post 1925 (not a part, not a key)

• Radiomuseum.org ID
• 10586

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Einheitsgerät U4 - Schrack Triotron; Wien

• Notes
• "Einheitsgerät" [Kat.Herlango 1925]

• Price in first year of sale
• 15.00 öS

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Picture reference
• Das Modell ist im «Radiokatalog» (Erb) abgebildet.

• Other Models

• Here you find 55 models, 44 with images and 6 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Schrack (Triotron); Wien