• Country
• Germany

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

• Year
• 1977

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 120039

• • 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 Transistors
• 15

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 455/10700 kHz

• Tuned circuits
• 5 AM circuit(s)     7 FM circuit(s)

• Wave bands
• Broadcast, Long Wave, Short Wave plus FM or UHF.

• Details
• Cassette-Recorder or -Player

• Power type and voltage
• Line / Batteries (any type) / 220 / 6 × 1,5 Volt

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

• Power out
• 3.5 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Derby Master 7.657.070 - Blaupunkt Ideal, Berlin,

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

• Dimensions (WHD)
• 390 x 24 x 105 mm / 15.4 x 0.9 x 4.1 inch

• Notes
• ICs: 4.

• Net weight (2.2 lb = 1 kg)
• 4.5 kg / 9 lb 14.6 oz (9.912 lb)

• Source of data
• Handbuch VDRG 1977/1978

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

• Author
• Model page created by Richard Winter. See "Data change" for further contributors.

• Other Models

• Here you find 3528 models, 3218 with images and 2322 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Blaupunkt (Ideal), Berlin, später Hildesheim