• Country
• United States of America (USA)

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

• Year
• 1949/1950

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 41156

• • Brand: Coronado

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

• Number of Tubes
• 5

• Valves / Tubes
• 1U4 1R5 1U4 1U5 3V4

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

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Line / Batteries (any type) / 117 AC/DC / 9 & 90 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4.75 inch = 12.1 cm

• Power out
• 0.12 W (unknown quality)

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

• from Radiomuseum.org
• Model: Coronado 05RA4-43-9876A - Gamble-Skogmo, Inc.;

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

• Notes
• The Coronado 05RA4-43-9876A made by Gamble-Skogmo Inc. is a three power operated portable superheterodyne receiver with a selenium rectifier and built in loop antenna.

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 21, Copyright 1950

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 8-50, set 103, folder 7 + Beitman 1951)

• Other Models

• Here you find 689 models, 322 with images and 618 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Gamble-Skogmo, Inc.; Minneapolis, MN