Radio Blinker Receiving Set Three-In-One

Perry & Sons, Frank B.; Providence (RI)

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  • Year
  • 1922
  • Category
  • Detector-Radio (Crystal or diode, without tubes/transistors)
  • Radiomuseum.org ID
  • 358548

 Technical Specifications

  • Main principle
  • Crystal or Solid State Detector
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 3 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Radio Blinker Receiving Set Three-In-One - Perry & Sons, Frank B.;
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 5.3 x 3.7 x 3.125 inch / 135 x 94 x 79 mm
  • Notes

  • The Perry Radio Blinker Receiving Set Three-In-One combines three functions into one model:

    1. Wireless Receiving Set (crystal receiver)
      • 375-2000 kHz range (150-800 m)
      • dust-proof crystal detector, extremely sensitive
      • tuning coil with multiple taps
    2. Miniature Sending Set (morse code transmitter)
      • transmission range within the limits of the buzzer gap RF-radiation
    3. Practice Set for Code Work
      • key and buzzer

    Connections for aerial, ground, and headphones.

    The receiver is the same as the Perry Radio Blinker Receiving Set.

    The Miniature Sending Set uses a key, buzzer, and internal Eveready 3V battery. The RF code transmission relies on the arcing of the buzzer contact gap to generate a very low-power, wideband RF static signal that may be picked up by the antenna wire and crystal receiver, or perhaps by another nearby crystal receiver. With two Three-In-One units it is possible to practice bidirectional code between them, subject to the limited buzzer RF transmission range.

    When one Three-In-One unit is used, the operator listens to their own code signals.

    There were three initial purchase options:

    • Basic unit: $12
    • Equipment No. 1 : $25
      • Basic unit and a pair of Western Electric Co. Headphones of best quality
    • Equipment No. 2 : $25
      • Basic unit and 2 pairs of Murdock 3000 ohm Headphones

    By 1925, Perry was advertising the basic unit for $6.

  • Net weight (2.2 lb = 1 kg)
  • 1 lb (1 lb 0 oz) / 0.454 kg
  • Price in first year of sale
  • 12.00 USD
  • Literature/Schematics (1)
  • Radio News (June 1922, page 1201; Aug. 1922, page 313)
  • Literature/Schematics (2)
  • -- Original prospect or advert (Radio Industry, Vol. III, No. 4, 1925, page 46)
  • Author
  • Model page created by Jerry Elarton. See "Data change" for further contributors.

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