• Country
• Germany

• Manufacturer / Brand
• Blaupunkt (Ideal), Berlin, später Hildesheim

• Year
• 1964 ?

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

• Radiomuseum.org ID
• 113429

• • alternative name: Ideal-Radiotelephon- und App-fabr. || Ideal-Werke AG; Berlin (ab 1934)
  • Brand: Rotstern

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

• Number of Tubes
• 1

• Valves / Tubes
• ECC81

• Number of Transistors

• Semiconductors
• OA81 OA81 OA81 OA81 OA81 OA81

• Tuned circuits
• 2 AM circuit(s)     2 FM circuit(s)

• Wave bands
• - without

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

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: FM-Stereo-Decoder IV 23904 - Blaupunkt Ideal, Berlin,

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 175 x 75 x 63 mm / 6.9 x 3 x 2.5 inch

• Notes

• FM-Stereo-Decoder, Nachfolger von Type 23900 mit geänderter Rückkoppelstufe.

  Verwendet in Blaupunkt Granada, Florida, Akansas, Bali, Lugano, Arizona etc.

• Net weight (2.2 lb = 1 kg)
• 0.4 kg / 0 lb 14.1 oz (0.881 lb)

• Source of data
• Handbuch VDRG 1963/1964

• Mentioned in
• -- Original-techn. papers.

• Author
• Model page created by Willi Ribbe. See "Data change" for further contributors.

• Other Models

• Here you find 3525 models, 3214 with images and 2320 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Blaupunkt (Ideal), Berlin, später Hildesheim