• Country
• Austria

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

• Year
• 1940 ??

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

• Radiomuseum.org ID
• 309697

• • Brand: Franek, Rudolf; Wien

• Main principle
• RF-Circuit or wave trap (separate, can also be an antenna with amp.)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite or Plastics (type unknown)

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

• Author
• Model page created by Wolfgang Eckardt. 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