• Country
• United States of America (USA)

• Manufacturer / Brand
• Sparks-Withington Co., (Sparton); Jackson, Michigan

• Year
• 1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 58744

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

• Number of Tubes
• 5

• Valves / Tubes
• 1A7G 1N5G 1H5G 1A5G 35Z5GT

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Line / Batteries (any type) / AC/DC 117 / 1 x 6 & 2 x 45 Volt

• Loudspeaker
• Presumably Dynamic Loudspeaker (moving coil)

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

• from Radiomuseum.org
• Model: Sparton Portable Radio 590-1 - Sparks-Withington Co., Sparton

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

• Notes
• Loop antenna.

• Net weight (2.2 lb = 1 kg)
• 17 lb (17 lb 0 oz) / 7.718 kg

• External source of data
• Ernst Erb

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

• Literature/Schematics (1)
• Beitman Radio Diagrams, Vol. 03, 1940 (page 131)

• Literature/Schematics (2)
• Rider's Perpetual, Volume 11 = ca. 1940 and before (11-7, 11-8)

• Literature/Schematics (3)
• Radio Today (and Television) (June 1939, page 21; July 1939, pages 14, 49)

• Literature/Schematics (4)
• Radio Retailing (Radio & Television R.) (ad June 1939, page 6)

• Other Models

• Here you find 817 models, 365 with images and 754 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sparks-Withington Co., (Sparton); Jackson, Michigan