Eliminates repeater squelch tails from receiver having its own squelch, while allowing normal communications to pass through. Circuit goes between receiver squelch gate and point at which squelch acts on audio amplifier, to provide about 3-s delay before turning amplifier on. If received signal disappears before end of delay, radio remains silent and circuit resets itself. If received signal lasts longer than 3 s, as when repeater is interrogated, receiver operation is normal. Designed for receivers using low voltage level to squelch audio amplifier. NE555 timer is wired as mono MVBR that is triggered through inverter a1 each time receiver squelch is tripped, pro-vided SCR is off. SCR type is not critical. Input is taken from squelch gate in receiver.-R. K. Morrow, Jr., Repeater Kerchunk Eliminator for Mobile Rigs, Ham Radio, 0ct. 1977, p 70-71.
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