• Country
• Germany

• Manufacturer / Brand
• Undy-Werke, Pyreia Metallwarenfabrik; Frankfurt / Main

• Year
• 1933

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

• Radiomuseum.org ID
• 122310

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Sperrkreis 390 - Undy-Werke, Pyreia

• Price in first year of sale
• 3.00 RM

• Source of data
• -- Original prospect or advert

• Author
• Model page created by Thorsten Brandenburg. See "Data change" for further contributors.

• Other Models

• Here you find 38 models, 37 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Undy-Werke, Pyreia Metallwarenfabrik; Frankfurt / Main