• Year
  • 1938/1939
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 581
    • alternative name: Ideal-Radiotelephon- und App-fabr. || Ideal-Werke AG; Berlin (ab 1934)
    • Brand: Rotstern

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • TRF with regeneration; 1 Special; 1 AF stage(s)
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Alternating Current supply (AC) / 110-240 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Bakelite case
  • from Radiomuseum.org
  • Model: 4W28 - Blaupunkt Ideal, Berlin,
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 495 x 348 x 248 mm / 19.5 x 13.7 x 9.8 inch
  • Notes
  • alle W-Mod. 1938 auch nur 135/150/165 Volt
  • Net weight (2.2 lb = 1 kg)
  • 11.4 kg / 25 lb 1.8 oz (25.11 lb)
  • Price in first year of sale
  • 167.00 RM
  • Circuit diagram reference
  • Lange+Schenk+FS-Röhrenbestückung
  • Picture reference
  • Das Modell ist im «Radiokatalog» (Erb) abgebildet.

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