Large-frequency alternators on the variable-reluctance style ended up used commercially to radio transmission in low-frequency radio bands. These were used for transmitting Morse code and, experimentally, for transmitting voice and tunes. In the Alexanderson alternator, both the sphere winding and armature winding are stationary, and recent is induced while in https://connercwpgx.ltfblog.com/34390078/the-clutch-diaries