• Country
• Finland

• Manufacturer / Brand
• Hellberg, Helsinki

• Year
• 1941–1943 ?

• Category
• Military Receiver

• Radiomuseum.org ID
• 206102

• Number of Tubes
• 4

• Valves / Tubes
• DK21 DF21 DAC21 DL21

• Main principle
• Superheterodyne (common)

• Tuned circuits
• 6 AM circuit(s)

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

• Power type and voltage
• Storage and/or dry batteries / 1,5; 2 & 90 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Korsu - Hellberg, Helsinki

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

• Notes
• Wave bands: 14-50m, 195-650m, 650-2000m

• Author
• Model page created by Timo Rantasaari. See "Data change" for further contributors.

• Other Models

• Here you find 34 models, 30 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hellberg, Helsinki