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.
Oh, if the 5 volts doesn't work on the TMV7A... it's broke! 73 AC0Y --- In Repeater-Builder@yahoogroups.com, Bob Dengler <[EMAIL PROTECTED]> wrote: > At 6/10/2005 04:30 PM, you wrote: > >Mathew Quaife wrote: > > > > >So lets just say for sake there was no 5 volts there, and I have > > discriminator audio, how would a COS or Squelch circuit be brought into > > action that will give me my 5 volts. I take the discriminator audio to > > the RVS-8 controller, what hooks to the COS circuit. I'm basically > > drawing blanks on how this works. > > > > > > >If you cannot come up with a suitable COS logic signal, but have > >Discriminator audio available, you can use any one of the > >circuits/boards referenced in this article to create a COS from > >discriminator audio. > > > >http://www.repeater-builder.com/temp/micor-bilevel.gif > > > >Kevin > > For faster fast squelch action, leave out C13. > > Bob NO6B Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
