Wireless Telephony: We call that "radio" today. This French system from 1914 had two megaphones for speaking, which were used alternately for brief periods to prevent overheating. Range: about 95 kilometers.
Wireless Telephony: We call that "radio" today. This French system from 1914 had two megaphones for speaking, which were used alternately for brief periods to prevent overheating. Range: about 95 kilometers.