• Country
• United States of America (USA)

• Manufacturer / Brand
• Echophone Radio, Inc. - see also (The) Radio Shop or Hallicrafters Inc.

• Year
• 1930/1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37974

• • Brand: Ufonic

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

• Number of Tubes
• 5

• Valves / Tubes
• 24 24 24 45 80

• Main principle
• TRF without regeneration; Screengrid 1926-1935

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110; 125 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 21 cm = 8.3 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: S-3 - Echophone Radio, Inc. - see

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Dimensions (WHD)
• 360 x 420 x 170 mm / 14.2 x 16.5 x 6.7 inch

• Notes
• Reference for the date: "Los Angeles Radio Manufacturing" by Floyd A. Paul. (1988), page 13: shows that in Autumn 1930, Echophone moved at least the production from Hollywood to Illinois and for December show in a service manual from December 1930 the chassis of S-3, S-4, S-5 and F. The schematic diagram of S-3 has a date of 9-5-30.

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• Machine Age to Jet Age II

• Literature/Schematics (2)
• Cathedral & Tombstone Radios

• Other Models

• Here you find 83 models, 40 with images and 44 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Echophone Radio, Inc. - see also (The) Radio Shop or Hallicrafters Inc.