X31A Ch= HS-894

• Country
• United States of America (USA)

• Manufacturer / Brand
• Motorola Inc. (ex Galvin Mfg.Co. Chicago); Schaumburg (IL)

• Year
• 1961

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 211821

• Picture
• Schematics

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

• Number of Transistors
• 8

• Semiconductors
• 2SA72 2SA73 2SA53 2SA53 2SB56 2SB54 2SB56 2SB56

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / "C"; 4 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: X31A Ch= HS-894 - Motorola Inc. ex Galvin Mfg.Co

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 8 x 5 x 3 inch / 203 x 127 x 76 mm

• Notes

• The Motorola model X31A is an 8 transistor, 1 thermistor and 2 diode portable AM receiver. AM band tuning range: 532-1620KHz. An earphone jack is located on side of radio which disconnects the speaker for private listening. 

  The letter designations at the end of the model name denote color as denoted below.

  Letter designation	Color
  "A"	Charcoal leather
  "B"	Blue leather
  "E"	Black leather
  "N"	Brown leather

• Source of data
• - - Manufacturers Literature

• Mentioned in
• Collector's Guide To TrR1 Bunis trans.94 (1996, page 172)

• Author
• Model page created by John Kusching. See "Data change" for further contributors.

• Other Models

• Here you find 4508 models, 2955 with images and 4002 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Motorola Inc. (ex Galvin Mfg.Co. Chicago); Schaumburg (IL)