RE: [Repeater-Builder] dispatch centers run through the internet
Given the inherit instability of the internet (it was NEVER designed to do what we are doing with it), I would consider any communications system which is reliant upon the internet to be flawed by design and completely untrustworthy. My two cents worth. From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of WA3GIN Sent: Monday, January 04, 2010 6:23 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] dispatch centers run through the internet Yes, and they are called Intranets. - Original Message - From: Kevin Custermailto:kug...@kuggie.com To: Repeater-Builder@yahoogroups.commailto:Repeater-Builder@yahoogroups.com Sent: Monday, January 04, 2010 5:55 PM Subject: Re: [Repeater-Builder] dispatch centers run through the internet The Internet is a shared medium. A private WAN/LAN commonly utilizes fiber optic cable or licensed wireless networking to accomplish connectivity. While private systems can deliver Internet, it is not (necessarily) THE Internet. Privately owned facilities like what many CATV, Phone, Internet, and combinations of them can have dark fiber or reserved virtual space that cannot get clogged with Internet overhead. The bottlenecking you might experience with facilities you cannot (do not) control can (will) be the downfall of such a system - unless a SLA can be gotten. A SLA is a service level agreement in which a company guarantees connectivity - to some degree. The more reliability the agreement extends - the higher the cost. Kevin Custer Jed Barton wrote: tell me about this system a little bit. You'll note that the manufacturer is not suggesting that you utilize the Internet for this device. It is marketed for use on a private LAN/WAN. Chuck WB2EDV
[Repeater-Builder] Maybe a strange question...
Our repeater is coordinated on a given two meter frequency. Due to terrain and other factors, we were forced to agree to some interference from a neighboring repeater, on the same frequency. The neighboring repeater is located on a peak roughly 100 miles away from us, and roughly 1800 feet higher in elevation. The repeater owner claims an ERP of 55 watts from an omni, however, I can consistently hear that repeater on my base at my QTH with an s-1 to s-3. I am transmitting 50w, 2dB loss in connectors, about 1.25 dB loss in feedline and about +6.5 dBi in antenna gain. So, I figure my ERP should be about 100 watts (+3dB = double in power, right). My antenna height is about 35 feet. So, as a newbie, I am assuming that if I can hear him at s-3, and he is transmitting 55w ERP, where my ERP is 100w, I should be able to program the radio with the proper offset and PL tone and get into the repeater. Is this a correct assumption? After all, if I can consistently hear him, the path is line of sight, right? Due to the difference in altitude, this would make sense. If all else is the same, I should be able to bring the repeater up. Or, is this repeater putting out much more than 55w ERP? Thanks!
