Derby 681 7.658.700

• Country
• Germany

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

• Year
• 1968/1969

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 869

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

• Picture
• Schematics

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

• Number of Transistors
• 10

• Semiconductors
• AF106 AF201 AF201 AF121 AF126 AF126 BC108 AC151 AC153 AC176

• Main principle
• Superheterodyne (common); ZF/IF 460/10700 kHz

• Tuned circuits
• 7 AM circuit(s)     11 FM circuit(s)

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

• Power type and voltage
• Dry Batteries / 6 × 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 cm = 3.9 inch

• Power out
• 2 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Derby 681 7.658.700 - Blaupunkt Ideal, Berlin,

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

• Dimensions (WHD)
• 231 x 193 x 79 mm / 9.1 x 7.6 x 3.1 inch

• Notes

• Europa-Taste für gespreizten MW-Bereich 1400···1600 kHz.
  Bei Betrieb im Auto über Autohalterung HV580 oder HV600 aus 12-V-Autobatterie Ausgangsleistung 3 W;
  Netzbetrieb mit zusätzlichem Netzteil möglich.

• Net weight (2.2 lb = 1 kg)
• 2.7 kg / 5 lb 15.2 oz (5.947 lb)

• Source of data
• Handbuch VDRG 1968/1969 / Radiokatalog Band 1, Ernst Erb

• Literature/Schematics (1)
• -- Original-techn. papers.

• Other Models

• Here you find 3569 models, 3255 with images and 2328 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Blaupunkt (Ideal), Berlin, später Hildesheim