Superior-frequency alternators of the variable-reluctance type have been used commercially to radio transmission in lower-frequency radio bands. These were useful for transmitting Morse code and, experimentally, for transmitting voice and audio. Inside the Alexanderson alternator, both the sector winding and armature winding are stationary, and present is induced during the https://fire-proof-plastic19910.link4blogs.com/56683508/indicators-on-starter-parts-you-should-know