• Country
• United States of America (USA)

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

• Year
• 1924

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 195960

• • Brand: Silvertone

• Number of Tubes
• 2

• Valves / Tubes
• WD12 WD12

• Main principle
• Audio-Amplification; 2 AF stage(s)

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: Two-Stage Amplifier Model 4A - Sears, Roebuck & Co.; Chicago

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 11 x 7 x 8 inch / 279 x 178 x 203 mm

• Notes
• The Sears Roebuck Model 4A Two-Stage Audio Amplifier was a matching unit for the Model 4 Detector Receiving set. It sold for $33.35 complete with batteries and two WD12 tubes or $18.75 amp and cabinet alone. This amplifier was manufactured by the Crosley Radio Corp.

• Net weight (2.2 lb = 1 kg)
• 12 lb 0 oz (12 lb) / 5.448 kg

• Price in first year of sale
• 19.00 $

• Literature/Schematics (1)
• 1924 Sears Roebuck Radio catalog

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• 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)