Bill one of the losses if a County fire department system which has 6 simulcast repeaters( 150 MHz) operating on wide-band with about 85% coverage of the County, and we put in three new channels (after almost 2 years of coordination and finding the correct channels), we put them up using the same sights and same output (50 watts erp) and using the same antennas—the new 3 channels under talk the existing wide-band systems by at least 30 percent. We are in the process of adding 2 new sites to make up the difference.
I am glad that you did not have a problem but this is just one of several which I have had a problem with, and I have become a believer in lost coverage, I have yet to see a system that has not lost coverage, I am glad that you have. Andy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Smith Sent: Friday, August 27, 2010 5:58 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Seeking emergency system design help Andy, my comment was not directed at the professionals, such as yourself and others I know personally that are on this list. They were based on his stated requirement for a disaster recovery radio system. It's not something to do cheap or without expert guidance. People keep commenting on losing range with narrowband systems. A large UHF LTR system I installed and maintained lost no discernable range switching from 5 KHZ to 2.5 KHz. All else was the same. Same antenna system, same repeaters, same mobiles. They just pushed a button to bring them to the new talkgroups. Bill KB1MGH ________________________________ From: Andrew Seybold <aseyb...@andrewseybold.com> To: Repeater-Builder@yahoogroups.com Sent: Fri, August 27, 2010 5:39:21 PM Subject: RE: [Repeater-Builder] Re: Seeking emergency system design help The FCC is re-thinking the move to 6.25 KHz based on the fact that narrow band systems (and I have done a few of them) lose about 30% of the existing coverage AND the NEW FCC believes that broadband is what it is all about in the future—no matter that broadband cannot do simplex or any of the other stuff needed for LMR and public safety. And like a few others have said on here—you have to narrowband but are NOT required to move to digital—P25 or anything else, I have just completed several systems which use analog and we have moved them from Wide to Narrow with no problems—EXCEPT the coverage problems I mentioned. Andy W6AMS (and btw there are professional LMR folks and consultants who work with this stuff every day on this list, just because we are hams too does not mean that we are not in the business as well)
