• Year
  • 1948
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 49227

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superheterodyne (common); ZF/IF 455/4300 kHz
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Power type and voltage
  • AC/DC-set / 105 - 125 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: 77XM21 Ch= HS-102 - Motorola Inc. ex Galvin Mfg.Co
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 13.5 x 8 x 8 inch / 343 x 203 x 203 mm
  • Notes
  • Selenium Rectifier.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 18 = 1949 and before

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