Radio Circular Co. V Schematic

Radio Circular Co. V

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Product Information:
Manufacturer:Radio Circular Co.

Schematic Pages

PNG: Page 1 Rider Manual Volume 7

Schematics Content

Page 1:


This instrument is equipped for operation on 110 volts D.C. or A.C., any frequency from 25 to 133 cycles per second. Before attempting to operate on any other voltage be sure that the proper adaptors are connected and the instructions accompanying them are understood. Special adaptors can be secured from the factory at a slight extra cost, for operating this receiver on automobiles, 32 volt farm light plants and 200 volt A.C. or D.C. ALWAYS plug cord into back of set before plugging into power supply. Cord for 110 volt or 220 volt heats moderately, as the cord contains resistance necessary for operation at these voltages. The 20 ft. aerial wire extending from the back of the set should be unwound, laid out along the floor or hung outside a window and is ordinarily all the aerial required. No ground connection should be used. Sometimes results are better if the tip of the antenna wire is connected to a radiator or other ground connection or to an outside aerial.

Connect pick-up leads to single pole toggle switch, which may be mounted in large hole in rear flange of set. Unsolder black wire and 5 mfd condenser from ground lug of coil on under side of chassis and resolder to one side of toggle switch. Solder other side of switch to ground lug of coil.

To remove set from cabinet, disconnect from power supply, remove knobs, remove back it com pact model, and unscrew the four felt headed screws on bottom of cabinet.
To balance set remove from cabinet, turn tuning condenser plates completely out, attach a test oscillator delivering 1712 K.C. to antenna of set and adjust trimmers on tuning condenser to loudest signal. Change test oscillator signal to 1400 K, C., turn tuning condenser until signal is tuned in and check trimmers again without moving tuning condenser.
If used in automobiles antenna stage should, be trimmed to the car antenna at time of installation.