Radiola HLL 220

• Country
• Sweden

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

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 123649

• • Brand: Radiola

• Picture
• Schematics

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

• Number of Tubes
• 3

• Valves / Tubes
• A425 A425 Radiola-F or B409

• Main principle
• TRF with regeneration

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Direct Current supply (DC) / 220 Volt

• Loudspeaker
• Magnetic loudspeaker (reed) generic.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Radiola HLL 220 - SR, Svenska Radioaktiebolaget

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Notes

• 1 regenerative detector + 2 AF, built-in loudspeaker.

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

• Literature/Schematics (3)
• Le Guide du Collectionneur TSF Biraud/Foster, Vol. II (page 286)

• 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