• Country
• United States of America (USA)

• Manufacturer / Brand
• Zenith Radio Corp.; Chicago, IL

• Year
• 1964 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 175524

• • alternative name: Chicago Radio Lab

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

• Number of Transistors
• 8

• Semiconductors
• 2N1632 2N1526 2N1524 2N1524 2N1524 2N406 2N408 2N408

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• from Radiomuseum.org
• Model: Royal 285-J Pocket Radio 285-J Ch=8KT40Z2 - Zenith Radio Corp.; Chicago,

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

• Dimensions (WHD)
• 89 x 147 x 43 mm / 3.5 x 5.8 x 1.7 inch

• Notes

• Same chassis (8KT40Z2) fitted to Royal models 285F, 285J, 285W, 285Y, 500WE1, & 500YE1.

  Civil Defense marks on station dial.

• Circuit diagram reference
• Radio and TV Servicing books (R&TVS) book

• Literature/Schematics (1)
• -- Schematic

• Literature/Schematics (2)
• Photofact TSM Transistor Radio Series SAMS (TSM-36 (March,1964))

• Literature/Schematics (3)
• Transistor Radios (Model info on page 125)

• Author
• Model page created by Keith Staines. See "Data change" for further contributors.

• Other Models

• Here you find 4496 models, 4101 with images and 3615 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL