• 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
• 55909

• • Brand: Silvertone

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

• Number of Tubes
• 8

• Valves / Tubes
• 78 6A7 78 75 45 45 37 80 or 5Z3

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Alternating Current supply (AC) / 110 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 8 inch = 20.3 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Silvertone 1708 Worlds Fair Order= 57D 1708 - Sears, Roebuck & Co.; Chicago

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Dimensions (WHD)
• 14 x 16.5 x 9.75 inch / 356 x 419 x 248 mm

• Notes
• In Rider's volume 4 we find a Sears model 1708 on pages 4-10 (layout), 4-11 (schematic), 4-13 (circuit notes) and 4-14 (speaker data) for tubes 78 (RF stage), 6A7 (mixer), 78 (IF), 37, 75 (AF), 2 x 45 (output) and 80. In Rider's 5 there is information for the follower, 1708-A on page 5-61 (schematic) and 5-62 (different layout) with tubes 6A7 (mixer and osc), 2 x 78 (IF), 37 (2nd det), 37 (AF), 42 (output) and 83V. Sears catalog #167 Fall & Winter 1933/34 shows a model 1708 and 1709 with the following tubes: 6A7, 2 x 78, 75, 37, 2 x 45 and 5Z3.

• Price in first year of sale
• 34.95 $

• 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
• The Sears Silvertone Catalogs 1930-1942 (page 68, 75)

• Literature/Schematics (1)
• Machine Age to Jet Age II (Riders 4-10, 11, 13, 14)

• Literature/Schematics (2)
• Sears, Roebuck Catalogs (Silvertone) (#167, Fall & Winter 1933/34, page 629. #168, Spring & Summer 1934, page 371.)

• Literature/Schematics (3)
• Cathedral & Tombstone Radios (page 237.)

• Other Models

• Here you find 5486 models, 3218 with images and 4192 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sears, Roebuck & Co.; Chicago (IL)