• Country
• Sweden

• Manufacturer / Brand
• Eric Sundberg AB, Sigtuna (ESS)

• Year
• 1927 ?

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 118255

• • Brand: ESS

• Main principle
• Crystal or Solid State Detector

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Hjärteress [Stockholm] - Eric Sundberg AB, Sigtuna ESS

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 142 x 81 x 163 mm / 5.6 x 3.2 x 6.4 inch

• Notes
• The company Eric Sundberg was manufacturing radio parts, but only one radio, the crystal set in two versions, with and without longwave. A very nice set of good quality.
  
  The name ESS intergrades in the name of the crystal set, Hjärter Ess, which is the Swedish expression för "Ace of Hearts". The marks on the detector and the set is a red heart. This version of Hjärter Ess is only for broadcast band up to 700 m. See also the main model Hjärter Ess for up to 2000 m.

• Source of data
• -- Collector info (Sammler)

• Author
• Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

• Other Models

• Here you find 3 models, 3 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Eric Sundberg AB, Sigtuna (ESS)