• Country
• United States of America (USA)

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

• Year
• 1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 158768

• • Brand: Silvertone

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

• Number of Tubes
• 8

• Valves / Tubes
• 1D5GP 1C7G 1D5GP 1D5GP 1H6G 1H4G 1H4G 4A6G

• Main principle
• Superhet with RF-stage; ZF/IF 465 kHz

• Tuned circuits
• 8 AM circuit(s)

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

• Power type and voltage
• Storage and/or dry batteries / 90 & 4 or 4.5 & 3 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 inch = 15.2 cm

• Power out
• 1.25 W (unknown quality)

• from Radiomuseum.org
• Model: Silvertone 4638A Ch= 101.472X - Sears, Roebuck & Co.; Chicago

• Notes
• 4638A with Dry A-Battery ; 4639A with Storage Battery. Speaker 6 or 8 inch. Presence of Bias Cells.

• Circuit diagram reference
• Rider's Perpetual, Volume 14 = 1944 = before 1943

• Literature/Schematics (1)
• Riders 14-5, 6

• Author
• Model page created by Dirk Taekels. See "Data change" for further contributors.

• Other Models

• Here you find 5471 models, 3201 with images and 4177 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sears, Roebuck & Co.; Chicago (IL)