Baby Grand Crystal Model R-21 Molded hard rubber case

Beaver Machine & Tool Co.; Newark, New Jersey

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  • Year
  • 1924/1925
  • Category
  • Detector-Radio (Crystal or diode, without tubes/transistors)
  • Radiomuseum.org ID
  • 234754

 Technical Specifications

  • Main principle
  • Crystal or Solid State Detector
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Bakelite case
  • from Radiomuseum.org
  • Model: Baby Grand Crystal Model R-21 [Molded hard rubber case] - Beaver Machine & Tool Co.;
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 4 x 0 x 2 inch / 102 x 0 x 51 mm
  • Notes

  • According to Maurice Sievers in Crystal Clear Vol II The Beaver Baby Grand came in four different variations. There is a version with a metal name plate on a wood case that is 1/8" shorter in height and also has smaller binding posts.

    This is the third version with the one piece molded hard rubber case. 

    Same as the Model R-1 except box and top surface are molded together. 

  • Price in first year of sale
  • 3.50 $
  • Literature/Schematics (1)
  • September 1925, Electrical Record Supplement magazine page 32
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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