• Country
• United States of America (USA)

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

• Year
• 1968 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 307950

• • alternative name: Chicago Radio Lab

• Number of Transistors
• 9

• Semiconductors

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Batteries / addl. power jack / 6 x 1.5 Volt

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

• Power out
• 0.5 W (0.775 W max.)

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

• from Radiomuseum.org
• Model: Royal 73 Ch= 9YT57Z9 - Zenith Radio Corp.; Chicago,

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

• Dimensions (WHD)
• 9 x 6.5 x 3.5 inch / 229 x 165 x 89 mm

• Notes

• Made in Hong Kong

• Net weight (2.2 lb = 1 kg)
• 3 lb (3 lb 0 oz) / 1.362 kg

• Literature/Schematics (1)
• Photofact TSM Transistor Radio Series SAMS (TSM-106, November 1969)

• Author
• Model page created by Aldo Andreani. See "Data change" for further contributors.

• Other Models

• Here you find 4505 models, 4101 with images and 3631 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL