SILENT_COR

Published:2009/7/22 1:31:00 Author:Jessie | From:SeekIC

Solid-state carrier-operated relay uses Q1 to sense DC level change from receiver squelch and forward-bias Q2, thus latching Q3 on. Q4 and Q5 prevent C1 from accumulating a charge. Q6 is then disabled as long as there is an incoming signal. Q2 feeds terminals 1 and 3 for switching transmitter on and starting timer that shuts of f transmitter after 3 min of use.Q6 is timer that holds transmitter on for short time after incoming carrier has dropped out (carrier tail). B2 adjusts tail length, usually 1,-2 s.-D. L. Moon, Solid-State Repeater Control, QST, Oct. 1974, p 19-21.



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