Because CTCSS falses on the random noise. Been there, done that, gave away the t-shirt.
WalterH --- In Repeater-Builder@yahoogroups.com, n...@... wrote: > > At 8/20/2009 23:17, you wrote: > > > >John, how's this for an experiment... > > > >Configure a repeater with two receivers, one built for +/- 5 kHz > >deviation, the other for +/- 15, feed them from a splitter, use audio from > >the narrow one, but allow a DTMF command to select the wider receiver's > >COS when conditions warrant. (Obviously, those conditions would have to > >include no adjacent channel signal...) > > If noise squelch is so problematic in severe multipath conditions, why not > do away with it entirely & use straight CTCSS squelch? The GE decoders > that use Versatone chips are fast enough that you can still almost > eliminate the squelch tail with an ADM. > > Bob NO6B >
