Hi Sounds like you need a VOX unit to tap audio into and that will give you a COR with hangtime (vox delay) etc.
There are circuits on the web. A second way if you can use CTCSS which will be more stable as in the quiet periods that a person does not talk you may get dropout. Use a CTCSS decoder analog board off the disc. and the detection of the correct tone will usually give you an open collector output. Regards Brad --- bsoutheyoz <[EMAIL PROTECTED]> wrote: > I am having trouble generating a COR / COS signal > for my new cross- > band repeater project. I do not want to pull my > expensive > transceiver apart to try and locate an internal COR > circuit. > > I have seen several commercial circuits that > generate a COR singnal > based on logic that detects a drop in RF noise when > a carrier is > detected (receiver squelch always open) but this > will obviously only > function properly on FM. > > Most repeater controllers seem to require a 3 V or > better input > signal change to key COR. I guess even high-level > speaker audio out > will not be sufficient to generate this voltage > (??), so my question > is : > > does anybody know of a cheap repeater controller > that will generate a > COR signal with audio in only? > > Thanks in advance, > > Brendan > > > > > > > > Yahoo! Groups Links > > > [EMAIL PROTECTED] > > > __________________________________ Do you Yahoo!? Yahoo! Finance Tax Center - File online. File on time. http://taxes.yahoo.com/filing.html 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/
