• Country
• Germany

• Manufacturer / Brand
• Grassmann, Peter, RFW, Radio-Funk-Werkstätten; vor 1945, Berlin & Neuhaldensleben

• Year
• 1935 ??

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

• Radiomuseum.org ID
• 92152

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Mittelwellen-Sperrkreis - Grassmann, Peter, RFW, Radio-

• Shape
• Miscellaneous shapes - described under notes.

• Notes
• Vorsteckbarer Sperrkreis.

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 111 models, 76 with images and 30 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grassmann, Peter, RFW, Radio-Funk-Werkstätten; vor 1945, Berlin & Neuhaldensleben