• Country
• Germany

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

• Year
• 1990 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 223817

• • alternative name: Unknown, Custom Built

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Superheterodyne (common)

• Wave bands
• Broadcast (BC) and FM or UHF.

• Details
• Cassette-Recorder or -Player

• Power type and voltage
• Line / Batteries (any type) / 220; 4 x 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Master AM / FM Cassette Recorder RR 9131 - UNBEKANNTE FIRMA D / A / CH -

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 280 x 140 x 90 mm / 11 x 5.5 x 3.5 inch

• Author
• Model page created by Jörg Holtzapfel. See "Data change" for further contributors.

• Other Models

• Here you find 466 models, 405 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»