Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 226
econd coil, held inclose proximity to, and co-axial with, the first, is attached to the centerof a thin mica diaphragm. A high-frequency current from a localsource is maintained through the stationary coil. The other coil, ar-ranged to vibrate with the diaphragm, is connected in the… … Fig. 13. Heterodyne Receiver Circuit 197 16 WIRELESS TELEPHONY tween the two coils—a force which varies with every fluctuation of theintensity of the received oscillations, and results in vibrations of themica diaphragm corresponding to those of the distant transmitter.When this device is used as a…
Electrical engineering
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