SCR_CONTROLS_RITY_MOTOR

Published:2009/7/14 22:18:00 Author:Jessie | From:SeekIC

Single SCR can replace several transistor or tube stages in RTTY, VOX, COR, and other relay control circuits. Threshold triggering effect of SCR means triggering is automatically suppressed on low-level noise and similar interference. Used in RTTY autostart and motor delay sections of demodulator. Pickup time is 1 s and dropout time is 3 s, determined by values of R1 and C1 and by SCR, Circuit keys only on 2125-Hz mark tone. Diodes are 50-PlV silicon. Rd is appropriate dropping resistor for relay, if needed.-D, Weeden, SCR Relay Control for RTTY, VOX, and COR ,QSTT, July 1976, p 42.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Automotive_Circuit/SCR_CONTROLS_RITY_MOTOR.html

Print this Page | Comments | Reading(3)