• Country
• Netherlands

• Manufacturer / Brand
• Erres, Van der Heem NV; Den Haag

• Year
• 1928

• Category
• Radio module post 1925 (not a part, not a key)

• Radiomuseum.org ID
• 70105

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

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Selectivator - Erres, Van der Heem NV; Den

• Shape
• Tablemodel, with any shape - general.

• Notes
• Information taken from Maker information. Picture Nr.: 053.45 . Pre-selection unit, is used inbetween the antenna and the receiver, improves selectivity

• Price in first year of sale
• 14.00 Hfl

• External source of data
• Radio Amateur Museum / Frans J.J. Driesens + ISBN 90-76014-04-3.

• Source of data
• Opkomst van de Nederlandse Radio-Industrie

• Mentioned in
• Radio-Expres, Netherlands

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 408 models, 325 with images and 221 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Erres, Van der Heem NV; Den Haag