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IP54 4*90° Digital Inclinometer Angle Protractor Backlight Protractor Slope Meter Single side Magnetic Electronic Goniometer| | - AliExpress
Detail of Goniometer Used inside the Radio Beacon Transmitting Station at Ford Airport, 1926 - The Henry Ford
![Practical wireless telegraphy; a complete text book for students of radio communication . <^ mm Lz Fig. 274—Receiver ConnectedAerial. to a Single Loop DIRECTION FINDER OR WIRELESS COMPASS. 259. CAR60FIUNDUM Fig, Practical wireless telegraphy; a complete text book for students of radio communication . <^ mm Lz Fig. 274—Receiver ConnectedAerial. to a Single Loop DIRECTION FINDER OR WIRELESS COMPASS. 259. CAR60FIUNDUM Fig,](https://c8.alamy.com/comp/2CRK4NA/practical-wireless-telegraphy-a-complete-text-book-for-students-of-radio-communication-lt-mm-lz-fig-274receiver-connectedaerial-to-a-single-loop-direction-finder-or-wireless-compass-259-car60fiundum-fig-275complete-wiring-diagram-of-the-marconi-direction-finder-260-practical-wireless-telegraphy-equally-and-an-oscillafory-current-hows-through-both-excitation-windings-of-the-goniometerthe-magnetic-fields-set-up-by-the-two-coils-combine-and-produce-a-resultant-field-fromwhich-the-maximum-induction-will-be-obtained-in-the-detector-circuit-when-the-pointer-ofthe-exploring-coil-l-2CRK4NA.jpg)