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Delco R-1139

Delco R-1139; United Motors (ID = 209750) Radio
Delco R-1139; United Motors (ID = 781237) Radio
Delco R-1139; United Motors (ID = 781238) Radio
Delco R-1139; United Motors (ID = 1750184) Radio
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Delco R-1139; United Motors (ID = 1750184) Radio
United Motors: Delco R-1139 [Radio] ID = 1750184 1200x1127
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For model Delco R-1139, United Motors Service (Delco):
Picture from General Motors 'Delco Radios for 1939' Brochure
Country:  United States of America (USA)
Manufacturer / Brand:  United Motors Service (Delco)
alternative name
Delco Radio Corp. (Appliance) || Delco-Remy Division, General Motors Corp. || United Motors Service Delco General Motors
Chieftain || Delco
Year: 1937–1939 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 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
Power out
from Model: Delco R-1139 - United Motors Service Delco
Material Wooden case
Shape Tablemodel with Push Buttons.
Dimensions (WHD) 11.5 x 8.125 x 6.5 inch / 292 x 206 x 165 mm

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

All listed radios etc. from United Motors Service (Delco)
Here you find 577 models, 312 with images and 548 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.