• Country
• United States of America (USA)

• Manufacturer / Brand
• Multi-Audi-Fone; Elizabeth, N.J.

• Year
• 1915

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

• Radiomuseum.org ID
• 196777

• Main principle
• Crystal or Solid State Detector

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Various materials

• from Radiomuseum.org
• Model: Multum In Parvo - Multi-Audi-Fone; Elizabeth, N.

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 3.25 x 0.875 x 2 inch / 83 x 22 x 51 mm

• Notes
• The Multi-Audi-Phone Crystal Receiver use a Crystaloi crystal detector for detection. The set covered the 50(!) to 3,000 meter wavelength range.

• Price in first year of sale
• 20.00 $

• Literature/Schematics (1)
• October 1915 The Wireless Age magazine page IV

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

• Other Models

• Here you find 14 models, 11 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Multi-Audi-Fone; Elizabeth, N.J.