• Country
• Netherlands

• Manufacturer / Brand
• Amroh NV (Radio Bulletin monthly), Muiden

• Year
• 1952

• Category
• Kit (Parts plus instruction) or building instructions only

• Radiomuseum.org ID
• 224903

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

• Number of Tubes
• 1

• Valves / Tubes
• EF40

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case, TUBES VISIBLE

• from Radiomuseum.org
• Model: Uniframe Microfoon Versterker UN-4 - Amroh NV Radio Bulletin

• Shape
• Tablemodel, with any shape - general.

• Notes

• The Uniframe Microphone Amplifier kit can be powered by unit UN-1 and connected to LF Amplifier UN-2.

• Mentioned in
• Radio Bulletin (januari 1952)

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

• Other Models

• Here you find 240 models, 208 with images and 231 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Amroh NV (Radio Bulletin monthly), Muiden