Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 167
nd and re-ceive switch to receive (if used with navy switch or break system relay, leave in sendposition always), turn test switch to In position, which starts the buzzer; then adjustCerusite Detector point on crystal surface until loudest response is heard. This crystalrequires very light pressure… … Fig. 176—Wiring Diagram Marconi Universal Receiver. transformer switches until the desired signal is heard, then loosen the coupling by rotatingcoupling handle to the right until the signal is just audible, then try other points of trans-former secondary switch and rotate secondary condenser handle…
Telegraph, Wireless
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