• Country
• Netherlands

• Manufacturer / Brand
• Velthuisen, Radio Inrichting Fa. Ch., Den Haag

• Year
• 1923 ?

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 192112

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

• Main principle
• RF-Circuit or wave trap (separate, can also be an antenna with amp.)

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Zeefkring - Velthuisen, Radio Inrichting

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 175 x 140 x 160 mm / 6.9 x 5.5 x 6.3 inch

• Notes
• Separating filter, with adjustable antenna coupling. Oak cabinet and ebonite front with a number of binding posts, two coils and a tuning capacitor. Can be used to increase the selectivity of a receiver.

• Source of data
• - - Data from my own collection

• Author
• Model page created by John Koster. See "Data change" for further contributors.

• Other Models

• Here you find 5 models, 3 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Velthuisen, Radio Inrichting Fa. Ch., Den Haag