• Country
• United States of America (USA)

• Manufacturer / Brand
• United Motors Service (Delco)

• Year
• 1937–1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 64420

• • alternative name: Delco Radio Corp. (Appliance) || Delco-Remy Division, General Motors Corp. || United Motors Service Delco General Motors
  • Brand: Chieftain || Delco

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

• Number of Tubes
• 5

• Valves / Tubes
• 6A8G 6K7G 6Q7G 25L6G 25Z6G L49B

• Main principle
• Superheterodyne (common); ZF/IF 465 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 115 Volt

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet. / Ø 5 inch = 12.7 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Delco R-1139 - United Motors Service Delco

• Shape
• Tablemodel with Push Buttons.

• Dimensions (WHD)
• 11.5 x 8.125 x 6.5 inch / 292 x 206 x 165 mm

• Notes

• Ballast Tube L49B

• Price in first year of sale
• 18.95 USD !

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 10 = 1939 and before

• Literature/Schematics (1)
• Beitman Radio Diagrams, Vol. 02, 1939 (Beitmans Page 161)

• Literature/Schematics (2)
• Riders 10-16, 17

• Other Models

• Here you find 579 models, 316 with images and 548 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from United Motors Service (Delco)