• Country
• United States of America (USA)

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

• Year
• 1935/1936

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 56005

• • Brand: Silvertone

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

• Number of Tubes
• 6

• Valves / Tubes
• 6A7 6K7G or 6K7MG 6C5G or 6C5MG 75 6F6G or 6F6MG 84

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

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Short Wave(s) and Police.

• Power type and voltage
• Alternating Current supply (AC) / Either 25 cycles, 110 to 120V or 50 to 60 cycles, 110 to 120 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 6 inch = 15.2 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Silvertone 1904 Order= 57K 1904 - Sears, Roebuck & Co.; Chicago

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

• Dimensions (WHD)
• 11.5 x 15.3 x 8.5 inch / 292 x 389 x 216 mm

• Notes

• The Sears Silvertone 1904 is an AC operated 6 tube BC, Police and SW band receiver.

  Band Frequency Ranges are as follows:
  BC Band (Band A).............540-1600kHz
  Police Band (Band B)........1.58-5.10MHz
  SW Band (Band C)............5.8-15.5MHz

  Uses variable inductive coupling of 2nd IF as volume control.  Minor production changes made as listed in Sears Service Manual and Rider's 7-14.  Chassis and schematic used in this model also used in models 1904A, 1906, 1908, 1911, 1914, 1938, 1954, 1964, 1964A and 1984.

  Has Automatic Volume Control, Tone Control, Airplane Dial, Slow Speed Tuning 17 to 1 ratio, 3-Gang Condenser.

  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).

• Price in first year of sale
• 21.25 $

• 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 6 = 1935 and before

• Mentioned in
• Table Top Radios Vol. 1 Stein 98

• Literature/Schematics (1)
• Cathedral & Tombstone Radios (Riders Sears 6-44, 45 and 7-14)

• Literature/Schematics (2)
• The Sears Silvertone Catalogs 1930-1942 (page 91)

• Literature/Schematics (3)
• Sears, Roebuck Catalogs (Silvertone) (# 171, Fall & Winter 1935/36, page 537.)

• Literature/Schematics (4)
• Silvertone Radios, Service Inf. 1928 thru 1936 (Pages 663 to 672)

• Other Models

• Here you find 5479 models, 3211 with images and 4185 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sears, Roebuck & Co.; Chicago (IL)