• Country
• Germany

• Manufacturer / Brand
• Siemens (& Halske, -Schuckert Werke SSW, Electrogeräte); Berlin, München

• Year
• 1974–1977

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 29505

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

• Number of Transistors
• 10

• Semiconductors
• µPC27

• Main principle
• Superheterodyne (common)

• Tuned circuits
• 6 AM circuit(s)     8 FM circuit(s)

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

• Power type and voltage
• Line / Batteries (any type) / 220 / 4×1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Power out
• 2 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: planar RK421 - Siemens & Halske, -Schuckert

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

• Dimensions (WHD)
• 335 x 205 x 55 mm / 13.2 x 8.1 x 2.2 inch

• Notes
• ICs: 1.

• Net weight (2.2 lb = 1 kg)
• 2.1 kg / 4 lb 10 oz (4.626 lb)

• External source of data
• Erb

• Source of data
• Katalog RFP 1974

• Mentioned in
• Handbuch VDRG 1975/1976 (und 1976/77)

• Other Models

• Here you find 2521 models, 2118 with images and 1334 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Siemens (& Halske, -Schuckert Werke SSW, Electrogeräte); Berlin, München