• Country
• Finland

• Manufacturer / Brand
• Stromberg, Helsinki

• Year
• 1939/1940

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 195313

• Number of Tubes
• 6

• Valves / Tubes
• 6K8G 6U7G 6Q7G 6V6G 6G5 or 6H5 5Z4G

• Main principle
• Superheterodyne (common)

• Tuned circuits
• 7 AM circuit(s)

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

• Power type and voltage
• Alternating Current supply (AC) / 115-250 Volt

• Loudspeaker
• -Loudspeaker incorporated, but system not known.

• Material
• Wooden case

• from Radiomuseum.org
• Model: 640 - Stromberg, Helsinki

• Shape
• Tablemodel, with any shape - general.

• Notes
• Wave bands:
  16 - 52m
  190 - 580m
  780 - 2100m
  
  Chassis made by Radiobell, Belgium

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

• Other Models

• Here you find 9 models, 7 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Stromberg, Helsinki