• Country
• Germany

• Manufacturer / Brand
• Tonfunk; Ermsleben/Harz; PGH (Ostd)

• Year
• 1975–1981

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

• Radiomuseum.org ID
• 199869

• • Brand: Walter Radio (Ostd.)

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• 4

• Semiconductors
• SF215 SF215 SF215 SS216

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - For headphones or amp.

• Material
• Various materials

• from Radiomuseum.org
• Model: Stereodecoder SD2.2 - Tonfunk; Ermsleben/Harz; PGH

• Shape
• Chassis only or for «building in»

• Notes
• Weiterentwicklung des SD1. für Geräte mit Pluspol an Masse. Variante SD2.1 Minuspol an Masse kann SD1 ersetzen, SD2.3 entspricht HiFi-Norm.
  Ab 1977 im Messgerätewerk Zwönitz gefertigt.

• Author
• Model page created by Jürgen Tiedmann. See "Data change" for further contributors.

• Other Models

• Here you find 21 models, 20 with images and 12 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tonfunk; Ermsleben/Harz; PGH (Ostd)