• Country
• United States of America (USA)

• Manufacturer / Brand
• Penberthy Injector Co.; Detroit, Michigan

• Year
• 1923 ?

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 197005

• Main principle
• Crystal or Solid State Detector

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Perfect Receiving Set Model 4R - Penberthy Injector Co.;

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

• Dimensions (WHD)
• 6 x 4 x 6 inch / 152 x 102 x 152 mm

• Notes
• Penberthy Products Model 4R Crystal receiving set.

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 3 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Penberthy Injector Co.; Detroit, Michigan