• Country
• United States of America (USA)

• Manufacturer / Brand
• Gamble-Skogmo, Inc.; Minneapolis, MN

• Year
• 1954/1955

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 90385

• • Brand: Coronado

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1T4 1S5 3V4

• Main principle
• Superheterodyne (common); ZF/IF 460 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 67,5 & 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.5 inch = 6.4 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Coronado RA42-9850A - Gamble-Skogmo, Inc.;

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

• Notes
• The Coronado RA42-9850A made by Gamble-Skogmo, Inc. is a battery operated portable AM superheterodyne receiver. Two 1.5 batteries have to be connected in parallel for the heaters.

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 14, 1954

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 4-55, set 274, folder 4)

• Author
• Model page created by Walter Wiesmüller † May 2012. See "Data change" for further contributors.

• Other Models

• Here you find 704 models, 327 with images and 631 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Gamble-Skogmo, Inc.; Minneapolis, MN