Relay - Type No. 202

Leach Relay Co.; San Francisco, CA

  • Year
  • 1920 ?
  • Category
  • Morse-Equipment & TTY, RTTY, TDD etc.
  • Radiomuseum.org ID
  • 326370

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Bakelite case
  • from Radiomuseum.org
  • Model: Relay - Type No. 202 - Leach Relay Co.; San Francisco
  • Dimensions (WHD)
  • 5 x 1.75 x 4 inch / 127 x 44 x 102 mm
  • Notes
  • Val Leach a World War I radio operator was frustrated by the two-way communication technology that prevented a receiving telegraph operator from breaking into or stopping a sender's transmission. In 1919, he invented the Leach Break-in Relay, a device that revolutionized telecommunications, launched the Leach Relay Company and began building and selling these relays.

  • Net weight (2.2 lb = 1 kg)
  • 1 lb 7 oz (1.438 lb) / 0.653 kg
  • Mentioned in
  • - - Manufacturers Literature (Picture of relay and date 1919)
  • Author
  • Model page created by Bruce Morgenstern. See "Data change" for further contributors.

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