• Country
• United States of America (USA)

• Manufacturer / Brand
• Research Laboratories, Inc.; Des Moines (IA)

• Year
• 1924 ??

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

• Radiomuseum.org ID
• 196264

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Kleer-Tone - Research Laboratories, Inc.;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 4 x 2 x 4 inch / 102 x 51 x 102 mm

• Notes
• The famous improved Kleer-Tone;
  Wave trap with ~20-345 pF tuning capacitor and a 255 µH coil.

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Research Laboratories, Inc.; Des Moines (IA)