• Country
• Sweden

• Manufacturer / Brand
• SR, Svenska Radioaktiebolaget (SRA, Radiola); Stockholm

• Year
• 1950 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 104060

• • Brand: Radiola

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

• Number of Tubes
• 4

• Valves / Tubes
• MDK40 or DK40 MDAF40 or DAF40 MDAF41 or DAF41 MDL41 or DL41

• Main principle
• Superheterodyne (common); ZF/IF 480 kHz

• Tuned circuits
• 5 AM circuit(s)

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

• Details
• Record Player (not changer)

• Power type and voltage
• Storage and/or dry batteries / 4,5 & 90 Volt

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

• Power out
• 0.1 W (unknown quality)

• from Radiomuseum.org
• Model: Radiola 520Bat - SR, Svenska Radioaktiebolaget

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

• Dimensions (WHD)
• 282 x 175 x 123 mm / 11.1 x 6.9 x 4.8 inch

• Notes
• Weight without batteries: 2,8 kg. Same as 510Bat, but colour blue/green.

• Net weight (2.2 lb = 1 kg)
• 4.4 kg / 9 lb 11.1 oz (9.692 lb)

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

• Author
• Model page created by Peter Olausson. See "Data change" for further contributors.

• Other Models

• Here you find 276 models, 171 with images and 163 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from SR, Svenska Radioaktiebolaget (SRA, Radiola); Stockholm