• Country
• United States of America (USA)

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

• Year
• 1951/1952

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 255054

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1U4 1U5 3S4

• 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) / Either AC: 60 cycles, 117V or DC: 117V or Batteries: 67.5 & 3.0 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: 52B9 "Escort" Ch= HS-305 - Motorola Inc. ex Galvin Mfg.Co

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 8.25 x 6.28125 x 2.3125 inch / 210 x 160 x 59 mm

• Notes

• The Motorola 52B9 is an AC/DC/Battery operated 4 tube portable AM receiver.  The AM band frequency tuning range is 535-1620kHz.  When operating from batteries, uses Qty(1) 67.5V "B" battery and Qty(2) 1.5V "D" size flashlight batteries. Has Selenium rectifier used during AC/DC operation.

  The following models use the same schematic and chassis but have different cabinets and/or cabinet colors:

  Model	Cabinet Colors
  52B1U	Black and Chrome
  52B2U	Green (Green simulated alligator)
  52B3U	Brown (Rodeo-Design Tan)
  52B4U	Tan (Suntan)
  52B5	Black
  52B6	Dove Gray
  52B7	Grass Green
  52B8	Flame Red
  52B9	Hot Chocolate
  52B10	Middy Blue
  52B11	Clover Pink
  52B12	Azure Blue

   

• Circuit diagram reference
• Rider's Perpetual, Volume 23 (last), covering up to 1954

• Literature/Schematics (1)
• - - Manufacturers Literature (Motorola Datasheet 68P620375-0)

• Literature/Schematics (2)
• - - Manufacturers Literature (Motorola Datasheet Supplement No. 2 68P632330)

• Literature/Schematics (3)
• Rider's Perpetual, Volume 23 (last) = covering up to 1954 (Riders 23-44 to 23-50)

• Literature/Schematics (4)
• Photofact Folder, Howard W. SAMS (Set 190, folder 10 Dated 1-53)

• 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)