Well, I do agree that it's not the best practice technically (an arguable point, I suppose), but such animals are common on the public safety bands. As for security, that too is a debatable point, as such links use a high frequency tone to indicate absence of a signal. If you could override the remote site, the worst you could do is get voted for retransmission. Most people can't simulate the control tone (users of this list excluded, of course!), as it's not standard on a user radio. As such, it is a rather highly secure link method.
But, one thing you could do is to reverse the tone logic and have it send the tone when a signal is received. That would decode faster than CTCSS or CDCSS, so your remote TX would respond faster. The only drawback is that you then have to notch that tone out of the transmit audio (which could be done after voting - one notch filter). Then, just switch the link TX with CAS/COS. Oh - you would have to switch the logic in the voter, too, so it sees tone as an active site rather than inactive. My copy of part 97 is not that old - in fact, it's a URL. :-) Another point to add - just make sure any continuous link has an ID on it that runs every 10 minutes. That part is still in the rule book. :-) Joe M. Lee Williams wrote: > > My source? Bad memory,,,Ok,maybe it "used to be" but a full time link > just isnt good practice. Its too easy for others to find and fiddle > with,jammers and the like. Its easier on the equipment as well. > Gee,wouldnt it fall under beacon rules then? Lets just say that > personnaly,I would not run a continuously transmitting link. My copy > of part 97 is so old,it fell apart when I pulled it out,and I KNEW you > would respond... 73,Lee > > ----- Original Message ----- > From: "mch" <[EMAIL PROTECTED]> > To: <Repeater-Builder@yahoogroups.com> > Sent: Thursday, December 04, 2003 10:26 PM > Subject: Re: [Repeater-Builder] Re: UHF Links with Voters > > > Lee, > > > > Please cite your source. Repeaters USED to be limited to > > 5 second tails, but that rule went away over 10 years ago. > > > > It is perfectly legal for a repeater (let alone a link) to TX > 24/7/365. > > > > Joe M. > > > > Lee Williams wrote: > > > > > > If its for amateur use,full time transmit links are illegal !!! > > > > > > > > > > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > > > > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
