• Country
• Germany

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

• Year
• 1951/1952

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 816

• • 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
• 5

• Valves / Tubes
• DF91 DK40 DF11 DAF11 DL11

• Number of Transistors

• Semiconductors
• E220C100

• Main principle
• Superhet with RF-stage; ZF/IF 473 kHz

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Line / Batteries (any type) / AC/DC 110-240 / 7,5 & 110 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 13 cm = 5.1 inch

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Riviera K-51T - Blaupunkt Ideal, Berlin,

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

• Dimensions (WHD)
• 360 x 280 x 160 mm / 14.2 x 11 x 6.3 inch

• Notes
• Automatische Ein- und Ausschaltung beim Öffnen und Schließen des Skalenvisiers. Eingebaute Rahmenantenne für LW und MW, Teleskopantenne (gegen Mehrpreis) für KW.

• Net weight (2.2 lb = 1 kg)
• 5.2 kg / 11 lb 7.3 oz (11.454 lb)

• Price in first year of sale
• 319.00 DM

• Source of data
• Kat.d.Rundf.GrossH.1951/52 / Radiokatalog Band 1, Ernst Erb

• Circuit diagram reference
• Lange Schaltungen der Funkindustrie, Buch 2

• Mentioned in
• Funkschau (5105)

• Literature/Schematics (1)
• -- Schematic

• 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