Transistorversterker UN-57

Amroh NV (Radio Bulletin monthly), Muiden

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  • Year
  • 1961
  • Category
  • Kit (Parts plus instruction) or building instructions only
  • Radiomuseum.org ID
  • 126774

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

 Technical Specifications

  • Number of Transistors
  • 4
  • Main principle
  • Audio-Amplification; 3 AF stage(s)
  • Wave bands
  • - without
  • Details
  • Rec.Player+Audio.Amp+LS
  • Power type and voltage
  • Dry Batteries / 6 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical
  • Power out
  • 0.23 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Transistorversterker UN-57 - Amroh NV Radio Bulletin
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 309 x 248 x 160 mm / 12.2 x 9.8 x 6.3 inch
  • Notes
  • Selbstbau-Koffergrammophon. Gegentakt-Verstärker mit vier Germanium-Transistoren (AM52 = AC134, AM53 = AC135, 2× AM73 = AC136). Man benutzte einen "Miraphon 15" Einbau-Plattenspieler der Firma Elac (Batteriespeisung 6 Volt, Stromverbrauch nur 32 mA), Amroh-Transistor-Ausgangstransformator U88, Transistor-Balanche-Eingangstransformator Amroh BI44 (1500 : 2× 200 Ohm).
  • Mentioned in
  • - - Manufacturers Literature (Amroh-Katalog 1963)
  • Literature/Schematics (1)
  • M. van Geelkerken, "Jongens Radio", Bussum: De Muiderkring 1971, pp. 82-86
  • Author
  • Model page created by Aren van Waarde. See "Data change" for further contributors.

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