At 6/10/2005 06:56 PM, you wrote:
>Lets face it, COS or what ever you want to call it is nothing more
>than a VOX circuit that works on high frequency noise. first the
>audio goes through a High pass filter of some sort then through an
>amplifier then to a detector circuit that drives a transistor
>switch. OH by the way, the switch is used to mute the receiver and
>viola a squelch circuit is born.
>NOTHING DIFFICULT ABOUT IT.
...unless you don't want to hear long 500 millisecond squelch
crashes. Just ask the engineers that designed the Micor or Mastr II
squelch circuits.
Bob NO6B
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