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C640 ; Gamble-Skogmo, Inc.; (ID = 373585) Radio
C640 ; Gamble-Skogmo, Inc.; (ID = 373586) Radio
C640 ; Gamble-Skogmo, Inc.; (ID = 373587) Radio
C640 ; Gamble-Skogmo, Inc.; (ID = 68738) Radio
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C640 ; Gamble-Skogmo, Inc.; (ID = 68738) Radio
Gamble-Skogmo, Inc.;: C640 [Radio] ID = 68738 640x480
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For model C640, Gamble-Skogmo, Inc.; Minneapolis, MN
Country:  United States of America (USA)
Manufacturer / Brand:  Gamble-Skogmo, Inc.; Minneapolis, MN
Year: 1941 ? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 6: 12SK7 12SA7 12SK7 12SQ7 35L6GT 35Z5GT
Main principle Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)
Wave bands Broadcast only (MW).
Power type and voltage AC/DC-set / 105-125 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
Power out
from Model: C640 - Gamble-Skogmo, Inc.;
Material Bakelite case
Shape Tablemodel with Push Buttons.
Dimensions (WHD) 12 x 7 x 6.25 inch / 305 x 178 x 159 mm
Notes Same as the Belmont model 638. Built in loop antenna.
Collectors' prices  
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 12 = ca. 1941 and before

All listed radios etc. from Gamble-Skogmo, Inc.; Minneapolis, MN
Here you find 592 models, 276 with images and 538 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.