Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 203
ength noted by adjusting the wavemeter to reson-ance. The aerial frequentlyis set into excitation byconnecting the antennaand earth wire of anaerial system across thevibrator of a buzzer, butthis method of excitationis not as satisfactory asthe connections of thetwo methods shown pre-viously. To… … a Closed Oscillation Circuit Fig. 215—Showing How the Wave Length ofis Measured. 10 to 20 microhenries of inductance are included at L-1 to constitute the secondary windingof the oscillation transformer, the additional turns required for any standard wave beingadded in the aerial tuning inductance.…
Telegraph, Wireless
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