Bandfilter afstemmer UN-23

Amroh NV (Radio Bulletin monthly), Muiden

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  • Year
  • 1953
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 225844

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

 Technical Specifications

  • Number of Tubes
  • 1
  • Main principle
  • Crystal or Solid State Detector with Amplifer
  • Tuned circuits
  • 2 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Powered by external power supply or a main unit. / DC 250 & AC 6,3 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Bandfilter afstemmer UN-23 - Amroh NV Radio Bulletin
  • Shape
  • Chassis only or for «building in»
  • Notes

  • Model UN-23 is a receiver for Broadcast stations (MW) at preset frequencies. The antenna signal is passed through a bandfilter and detected in the first section of the double triode ECC40. The resulting LF signal is amplified in the second section.

    The Amroh power supply unit UN-1 may be used for powering the UN-23.

    The coupling capacitor in the bandfilter (C3) has to be set experimentally between 3 to 30 pF for best selectivity and reception.

     

  • Author
  • Model page created by Rob Majoor. See "Data change" for further contributors.

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