• Country
• Austria

• Manufacturer / Brand
• Stefra (Marke), Rudolf Franek; Wien

• Year
• 1950 ??

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

• Radiomuseum.org ID
• 122304

• • Brand: Franek, Rudolf; Wien

• Main principle
• Superheterodyne (common)

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: ZIIF - Stefra Marke, Rudolf Franek;

• Dimensions (WHD)
• 50 x 100 x 50 mm / 2 x 3.9 x 2 inch

• Notes
• Stefra Zwischenfrequenz-Bandfilter.

• Source of data
• - - Data from my own collection

• Author
• Model page created by Vinzenz Fest. See "Data change" for further contributors.

• Other Models

• Here you find 20 models, 19 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Stefra (Marke), Rudolf Franek; Wien