Substantial-frequency alternators in the variable-reluctance type have been used commercially to radio transmission in lower-frequency radio bands. These were utilized for transmitting Morse code and, experimentally, for transmitting voice and songs. From the Alexanderson alternator, both the sector winding and armature winding are stationary, and present-day is induced within the https://stephenezqka.rimmablog.com/34509809/details-fiction-and-hejian-nuojin-auto-parts-co