• Year
  • 1948/1949
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 49229

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
  • Wooden case
  • from Radiomuseum.org
  • Model: 77XM22B Ch= HS-102 - Motorola Inc. ex Galvin Mfg.Co
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 13.375 x 8 x 7.375 inch / 340 x 203 x 187 mm
  • Notes
  • Selenium Rectifier. In Blonde cabinet. Also available in Walnut cabinet, Motorola model 77XM22.

  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 18 = 1949 and before
  • Literature/Schematics (3)
  • Motorola Folder D1237 for 1949.

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