• Country
• Sweden

• Manufacturer / Brand
• Uddenberg, Ralf A. (RU); Göteborg

• Year
• 1926 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 262162

• Number of Tubes
• 3

• Valves / Tubes
• A409 B406 B406

• Main principle
• TRF with regeneration

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Storage and/or dry batteries / 4 & ? Volt

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: RU 3 - Uddenberg, Ralf A. RU;

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 365 x 220 x 175 mm / 14.4 x 8.7 x 6.9 inch

• Notes

• Regenerative detector.

• Literature/Schematics (3)
• Le Guide du Collectionneur TSF Biraud/Foster, Vol. II (page 367)

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 7 models, 2 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Uddenberg, Ralf A. (RU); Göteborg