RESONANT_REED_PAGING_RECEIVER

Published:2009/7/19 22:31:00 Author:Jessie | From:SeekIC

Fertile antenna L1 is tuned to one of up to 45 different carrier frequencies in range from 15 to 30 kc, keyed at various repetition rates. Resonant relay K1 in collector circuit of detector Q5 vibrates when excited at its natural keying rate, thereby interrupting loudspeaker current at audio rate to create paging tone.-J. G. DeGraaf, Selective Paging System Uses Coded Transmission, Electronics, 33:9, p 68-70.



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