• Country
• United States of America (USA)

• Manufacturer / Brand
• Sears, Roebuck & Co.; Chicago (IL)

• Year
• 1933/1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 55919

• • Brand: Silvertone

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

• Number of Tubes
• 10

• Valves / Tubes
• 78 6A7 78 75 37 45 45 45 45 83-V

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / Either transformer: 25 cycles, 110V or 50 to 60 cycles, 110 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: Silvertone 1720 Challenger Order= 57D 1720 - Sears, Roebuck & Co.; Chicago

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

• Dimensions (WHD)
• 24 x 40 x 13 inch / 610 x 1016 x 330 mm

• Notes

• The Sears Silvertone 1720 is an AC operated 10 tube BC band receiver.  Has push-pull output stage with parallel 45 type tubes on each side for a total of Qty(4) output tubes.

  The chassis and schematic used in this model is also used in models 1725, 7065, 7103 and 7115.

  Catalog States: Tuning down to 170 meters, the "Challenger" can get POLICE CALLS in many locaities.  Furnished in a six-leg high-boy cabinet of attractive appearance, gracefully shaped front.  Top of sliced walnut veneer.  Figured oriental side front panels and matched butt walnut instrument panel. Balance of cabinet of rich walnut finish.

  Order number 57D 1720 Cash Price $ 39.00. See details and summaries about Sears catalogs etc. This model was manufactured for Sears by Colonial Radio Corp., Buffalo, NY (Sears Manufacturer Source Number Code 101).

• Price in first year of sale
• 39.00 $

• 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 4 = ca. 1934 and before

• Mentioned in
• Pre-War Consoles

• Literature/Schematics (1)
• The Sears Silvertone Catalogs 1930-1942 (page 67)

• Literature/Schematics (2)
• Sears, Roebuck Catalogs (Silvertone) (#167, Fall & Winter 1933/34, page 628.)

• Literature/Schematics (3)
• Silvertone Radios, Service Inf. 1928 thru 1936 (Pages 365 to 369)

• Literature/Schematics (4)
• Riders Sears 4-22, 23 ; 5-13 ; 7-15

• Other Models

• Here you find 5477 models, 3208 with images and 4182 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sears, Roebuck & Co.; Chicago (IL)