![The principles underlying radio communication . o run automatically, at theproper speed for the generator, or perhaps it would be betterto say that there are certain definite speeds at which 60-cyclea.c. The principles underlying radio communication . o run automatically, at theproper speed for the generator, or perhaps it would be betterto say that there are certain definite speeds at which 60-cyclea.c.](https://c8.alamy.com/comp/2CRMM4J/the-principles-underlying-radio-communication-o-run-automatically-at-theproper-speed-for-the-generator-or-perhaps-it-would-be-betterto-say-that-there-are-certain-definite-speeds-at-which-60-cycleac-motors-have-to-run-and-the-generator-has-such-a-numberof-poles-that-it-gives-the-desired-frequency-when-driven-by-amotor-operating-at-one-of-these-speeds-voltage-control-of-thegenerator-is-secured-by-means-similar-to-those-shown-in-fig120-motor-driven-by-d-c-motorwhen-direct-current-at-110volts-is-available-the-arrangement-is-somewhat-different-theexciter-is-unnecessary-because-cu-2CRMM4J.jpg)
The principles underlying radio communication . o run automatically, at theproper speed for the generator, or perhaps it would be betterto say that there are certain definite speeds at which 60-cyclea.c.
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![Practical wireless telegraphy; a complete text book for students of radio communication . GAP- Fig. 333—Special Emergency Transmitter. 318 PRACTICAL WIRELESS TELEGRAPHY AEMAL TUNINGINDUCTMCE. An induction coil fed with a direct Practical wireless telegraphy; a complete text book for students of radio communication . GAP- Fig. 333—Special Emergency Transmitter. 318 PRACTICAL WIRELESS TELEGRAPHY AEMAL TUNINGINDUCTMCE. An induction coil fed with a direct](https://c8.alamy.com/comp/2CRJN29/practical-wireless-telegraphy-a-complete-text-book-for-students-of-radio-communication-gap-fig-333special-emergency-transmitter-318-practical-wireless-telegraphy-aemal-tuninginductmce-an-induction-coil-fed-with-a-direct-current-storage-battery-can-be-connected-as-in-pig334-in-this-case-the-rotary-spark-gap-would-not-be-required-the-induction-coil-wouldgive-a-clearer-spark-note-than-a-rotary-gap-because-its-current-output-is-considerably-less-than-that-of-a-high-voltage-alternating-cur-rent-transformer-a-temporary-receiving-apparatus-can-bedevised-as-in-fig-149-wherein-a-crystal-2CRJN29.jpg)