• 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
• 73784

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: X31N 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 X31N 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. 

  Unit built-in into a leather case ( Genuine Top Grain Leather ), Dial light, speaker: Motorola Golden Voice, leather handle.

  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

• Net weight (2.2 lb = 1 kg)
• 1.350 kg / 2 lb 15.6 oz (2.974 lb)

• External source of data
• Picture Bill Quinn

• Source of data
• The Collector's Guide To Antique Radios 2. Edition

• Mentioned in
• Transistor Radios

• Literature/Schematics (1)
• - - Manufacturers Literature

• Literature/Schematics (2)
• Collector's Guide To TrR1 Bunis trans.94 (1996, page 173)

• Author
• Model page created by Steven Sostrom. See "Data change" for further contributors.

• Other Models

• Here you find 4596 models, 2962 with images and 4095 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)