• Country
• United States of America (USA)

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

• Year
• 1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 58629

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

• Number of Tubes
• 10

• Valves / Tubes
• 35 35 27 35 35 27 45 45 80 27

• Main principle
• Superhet with RF-stage; ZF/IF 172.5 kHz; 1 AF stage(s)

• Tuned circuits
• 10 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Details
• Record Player (perh.Changer); Radio with other functions

• Power type and voltage
• Alternating Current supply (AC) / 100-130 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Sparton 45 Visionola - Sparks-Withington Co., Sparton

• Shape
• Console, Highboy (legs > 50 %).

• Dimensions (WHD)
• 32.75 x 51.5 x 24.75 inch / 832 x 1308 x 629 mm

• Notes

• Early "Home Talking Movies" set (Movie, Radio Phonograph Combination) Visionola, introduced by Visionola Mfg. Corp., 60 East 42nd Street, New York, sold by Sparton (Sparks-Withington Co.). In February 1931 the model was featured by "Radio News". This was similar to Visivox from Sprague. Push-pull audio amplifier. Details can be read in "Radio News", February 1931 under "Radio points the way to Home Talking Movies". Similar is the Sprague Visavox. From each, only a few are left. See pictures at agassiztrading.com.
  Actually the system was developed in 1930 by using the new tube UY235, together with the 551 the first variable-mu tube. One has to know that tube manufacturers sent out new tubes for designing new circuits many months before the actual release, which was here June 1931 for the UY235. Therefore the model could not be on the market before, but advertised yes  ...
  A Canadian folder (in green) shows the following models together: 15, 24, 26, 30, 35, 40, 6, 9A, 10 and the Sparton Visionola.

• Net weight (2.2 lb = 1 kg)
• 298 lb 0 oz (298 lb) / 135.292 kg

• Price in first year of sale
• 575.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Circuit diagram reference
• Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

• Mentioned in
• Rider's 2-32, 2-33

• Literature/Schematics (1)
• Radio Retailing (Radio & Television R.) (January 1931, page 52.)

• Literature/Schematics (2)
• Radio News (February 1931,)

• Literature/Schematics (3)
• Sparton Radio Service Manual (Sparton Manual 1, Bulletin 41-1 to 16, Bulletin 33-3, 4)

• 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