File:Tesla beat receptor'.gif

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	22:13, 16 May 2011		561 × 266 (52 KB)	commons>GLPeterson	{{Information \|Description ={{en\|1=Fig. 5. The First "Beat" Receptor for Radio-Telegraphy Invented by Tesla, Which Foreshadowed the "Heterodyne."}} \|Source ="Dr. Nikola Tesla and His Achievements" \|Author =The Electrical Experimenter \|

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