• Country
• Germany

• Manufacturer / Brand
• UNBEKANNTE FIRMA D / A / CH - Siehe Anleitung unter der «Firma»

• Year
• 1940 ??

• Category
• Miscellaneous (Other, Various) - see notes

• Radiomuseum.org ID
• 193863

• • alternative name: Unknown, Custom Built

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

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Sideron Sperrkreis 83/1490 - UNBEKANNTE FIRMA D / A / CH -

• Notes
• Sideron Sperrkreis Nr. 83/1490, 1490-1650 m;
  LW, Einstellschraube für Spulenkern. Bananenbuchse und Stecker integriert.

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

• Other Models

• Here you find 470 models, 408 with images and 40 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from UNBEKANNTE FIRMA D / A / CH - Siehe Anleitung unter der «Firma»