shore. On this occasion it was direct current flows through choke coils which prevent ment is shown again by itself somewhat enlarged. shown publicly that for distances up to four miles, the high-frequency alternating current from passing, The conductor leading to the aerial wire passes… … terrupt or vary’ these a telegraph key and a de- waves at intervals depend- vice resembling the ordi- ing on the signals or char- nary buzzer which is THE DE FOREST RADIO-TELEPHONE APPARATUS. acter of the sound. The termed a “chopper” by production and transmission of the waves is essen- arc…
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