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Radio-controlled Garage Door Operator

Radio-controlled Garage Door Operator; Barber-Colman Co.; (ID = 666882) Radio Radio-controlled Garage Door Operator; Barber-Colman Co.; (ID = 666885) Radio
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Radio-controlled Garage Door Operator; Barber-Colman Co.; (ID = 666882) Radio
Barber-Colman Co.;: Radio-controlled Garage Door Operator [Radio] ID = 666882 532x932
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For model Radio-controlled Garage Door Operator, Barber-Colman Co.; Rockford Ill.:
Radio Retailing January 1931, page 52.
Country:  United States of America (USA)
Manufacturer / Brand:  Barber-Colman Co.; Rockford Ill.
Year: 1930/1931 Category: Broadcast Receiver - or past WW2 Tuner
Main principle Transceiver
Power type and voltage Line / Storage batteries (perhaps also batteries) / 6 for transmitter, Receiver AC 110 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Model: Radio-controlled Garage Door Operator - Barber-Colman Co.; Rockford
Material Metal case
Shape Chassis only or for «building in»
Dimensions (WHD) 18 x 12 x 12 inch / 457 x 305 x 305 mm
Notes Details about this very early Radio-controlled Garage Door Operator can be read from the pictures. The receiver measures 18 x 12 x 12". The transmitter is made with a spark coil which is enclosed in a water-tight box clamped to the mainspring in the car. The signal is coded and when the car lights are burning, the lights in the garage are turned on also.
Literature/Schematics (1) Radio Retailing (Radio & Television R.) (January 1931, page 52.)

Model page created by Ernst Erb. See "Data change" for further contributors.

All listed radios etc. from Barber-Colman Co.; Rockford Ill.
Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.