• Country
• United States of America (USA)

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

• Year
• 1933

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 55910

• • Brand: Silvertone

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

• Number of Tubes
• 8

• Valves / Tubes
• 6A7 78 78 37 37 37 42 83-V

• Main principle
• Superheterodyne (common)

• 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)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Silvertone 1708-A - Sears, Roebuck & Co.; Chicago

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• 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.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 5 = ca. 1934 and before

• Other Models

• Here you find 5482 models, 3214 with images and 4188 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sears, Roebuck & Co.; Chicago (IL)