• Country
• United States of America (USA)

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

• Year
• 1958 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 259974

• • Brand: Silvertone

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

• Number of Transistors
• 6

• Semiconductors
• 2N94 2N94 2N94 2N35 2N214 2N214

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 1 x 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Silvertone Order= 57K 7228, 7229 Ch= 528.48700 - Sears, Roebuck & Co.; Chicago

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 11.125 x 8 x 5.875 inch / 283 x 203 x 149 mm

• Notes

• Six Transistors plus two Germanium Diodes for battery economy. Silvertone model 57K 7228 is without battery $56.95 and model 57K 7229 is with battery $57.90. Eliptical 6x4-inch speaker.

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 387, Folder 14, February 1958)

• Literature/Schematics (3)
• Sears, Roebuck Catalogs (Silvertone) (page 867)

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• 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)