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Squelch Tail

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A squelch tail is the burst of white noise that occurs in a receiver when the transmitting station unkeys. It's duration is the time it takes for the receiver to squelch once there is no more signal. Generally a shorter the squelch tail is more desirable. Some receivers have variable squelch tails where weaker signals will have a longer squelch tail to prevent premature squelching. The MICOR squelch circuit is famous for this.