• Country
• United States of America (USA)

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

• Year
• 1946

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 58729

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

• Number of Tubes
• 7

• Valves / Tubes
• 7A7 7Q7 7A7 7B6 6F6 6F6 5Y3GT

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

• Wave bands
• Broadcast plus 2 Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 9.38 inch = 23.8 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Sparton 7-AM-46 Ch= 7-46 - Sparks-Withington Co., Sparton

• Shape
• Console, Lowboy (legs < 50 %).

• Notes
• Built in ratatable loop antenna. BC 540 - 1630 KC, Police 1,58 - 5,6 MC, Short Wave 5,5 - 19 MC. Sams photofact, set 1, folder 461-31, date 6-46, features the Sparton model 7AM46 and 8AM46 as the same schematic.

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios (6th edition)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 1 folder 461-31 date 6-46)

• Other Models

• Here you find 773 models, 361 with images and 720 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sparks-Withington Co., (Sparton); Jackson, Michigan