• Country
• United States of America (USA)

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

• Year
• 1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 55939

• • Brand: Silvertone

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

• Number of Tubes
• 7

• Valves / Tubes
• 6A7 78 6B7 37 43 43 25Z5

• Main principle
• Superheterodyne (common); ZF/IF 175 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / Either AC 60 cycles, 110V or DC 110 Volt

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

• from Radiomuseum.org
• Model: Silvertone 1750 - Sears, Roebuck & Co.; Chicago

• Notes

• The Sears Silvertone 1750 is an AC/DC operated 7 tube BC band receiver.  Has push-pull audio output stage.  Rectifier tube configured as voltage doubler circuit.  Has internal switch that selects between AC and DC that connects speaker field coil before or after rectifier tube.

  Original power supply circuit in this model would blow out the filter capacitors and the rectifier tube would have a short life.  Changes documented in the Sears Service Information manual eliminate these problems.

  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).

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 4 = ca. 1934 and before

• Literature/Schematics (1)
• Rider's Perpetual, Volume 4 = ca. 1934 and before (Riders Sears 4-31, 32)

• Literature/Schematics (2)
• Silvertone Radios, Service Inf. 1928 thru 1936 (Pages 417 to 420)

• Other Models

• Here you find 5491 models, 3222 with images and 4200 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sears, Roebuck & Co.; Chicago (IL)