GUARINI REPEATER. 1, antenna; 2, relay or aerial switch; 3, induction coil; 4. condenser, parallel to spark gap; 5, coherer; 6, relay; 7, transformer coil. from the Article A REVIEW OF WIRELESS-TELEGRAPH ENGINEERING PRACTICE. By A. Frederick Collins. from The Engineering Magazine Devoted to Industrial Progress Volume XXIV October 1902 - March 1903 The Engineering Magazine Co

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