• Country
• Netherlands

• Manufacturer / Brand
• Minimax, Radio-Onderneming, Beek en Donk

• Year
• 1926 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 268531

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

• Number of Tubes
• 4

• Valves / Tubes

• Main principle
• TRF with regeneration

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Various materials

• from Radiomuseum.org
• Model: O.V.B.4bis - Minimax, Radio-Onderneming,

• Shape
• Chassis only or for «building in»

• Mentioned in
• Radio Technisch Tijdschrift, Nr. 151, December 2014

• Author
• Model page created by Gidi Verheijen. See "Data change" for further contributors.

• Other Models

• Here you find 23 models, 21 with images and 10 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Minimax, Radio-Onderneming, Beek en Donk