The Radio Amateur's Hand Book / A Complete, Authentic and Informative Work on Wireless Telegraphy and Telephony

by A. Frederick Collins

RADIO WAVES.--See Waves, Radio.

REACTANCE.--When a circuit has inductance and the current changes in value, it is opposed by the voltage induced by the variation of the current.

REACTANCE, CAPACITY.--The capacity reactance is the opposition offered to a current by a capacity. It is measured as a resistance, that is, in ohms.

RECEIVING TUNING COILS.--See Coils, Inductance.

RECEIVER, LOUD SPEAKING.--See Loud Speakers.

RECEIVER, WATCH CASE.--A compact telephone receiver used for wireless reception.

REACTANCE, INDUCTIVE.--The inductive reactance is the opposition offered to the current by an inductance coil. It is measured as a resistance, that is, in ohms.

REACTOR, FILTER.--A reactance coil for smoothing out the pulsating direct currents as they come from the rectifier.

REACTOR, PLATE CIRCUIT.--A reactance coil used in the plate circuit of a wireless telephone to keep the direct current supply at a constant voltage.

RECEIVER.--(1) A telephone receiver. (2) An apparatus for receiving signals, speech or music. (3) Better called a receptor to distinguish it from a telephone receiver.