• Year
  • 1951 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 48850

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Line / Batteries (any type) / AC/DC 117V = 110 -120 or 67.5 & D: 2 x 1.5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3.5 inch = 8.9 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: 51M2U Ch= HS283 - Motorola Inc. ex Galvin Mfg.Co
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Notes
  • Motorola model 51M2U is a three power operated portable superheterodyne receiver with loop antenna. Selenium Rectifier ; Color=Maroon. Typo on first page in tube types , power output 354 has to be 3S4.

  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 11, 1951

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The model 51M2U is part of the collections of the following members.

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