70KW linears? I throw the BS flag on that one. 500 miles with no skip? That pesky law of physics throws the BS flag on that one.
I would LOVE to see a mobile antenna capable of handling 70KW. Much less the power source, as well as the feedline. Don't take your organs to heaven, heaven knows we need them down here! Be an organ donor, sign your donor card today. ----- Original Message ----- From: "Chuck Profito" <[email protected]> To: "'WISPA General List'" <[email protected]> Sent: Wednesday, March 31, 2010 8:48 PM Subject: Re: [WISPA] Does anybody have any ideas? > Forbes, > Hope the rest of the list doesn't think I'm nuts: > Do you see any large, hi gain CB or Ham beam antennas or Truckers from the > southern area parked or loading nearby? > Within say 1/4 mile of B tower? The new mobile 70KW class C Linear's are > about as dirty as they come. Some of those > drivers from Mexico and AZ are talking direct, no skip, 500 miles on the > lower vertical channels. That much bleed over > in radiated power may trip ground on your switch and or MT boards. It > could > come right thru your tower grounding, let alone your antennas and CAt5. > Could you try batteries there? Say a smart charger thru a UPS, then to > batteries. i.e. no common ground. > > Chuck Profito > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Forbes Mercy > Sent: Wednesday, March 31, 2010 10:06 AM > To: WISPA General List > Subject: [WISPA] Does anybody have any ideas? > > We have been plagued with an ongoing issue in our Mikrotik backhauls. > It happens about once a month and only on three radios that feed each > other, all other sites work fine. Site A is my head end, it is a > Mikrotik 433 with an XR5 chip that feeds about five miles to another > site to Site B. Site B has the same equipment that goes through a > managed switch then passes on to Site C about 7 miles further. > > What happens is we are suddenly paged that all three are down. > Sometimes Site A stays up, most times not, we can get into Site A since > it's the head end and we reboot it, it comes right back up. Site B and > C stay down, we have to drive to Site B and reboot it, it comes back up > but Site C stays down. We have a remote reboot for it from a redundant > feed so after rebooting it C reconnects to B and they are all up. This > will happen three or four more times in a single day or not at all again > for a month, it's totally unpredictable. The boards are up but not > communicating, it also takes down the other 2.4 Mikortik AP's at Site B > and that has to be rebooted. We normally run arp -d to clear up any > residual, it sure appears to be traffic related and we are on a bridged > not routed network. > > The only similarities is it's only this feed, it usually happens in > spurts of a day or two then stops for a long time, it always happens > during the working day leading me to believe it's coming from a day > user. We run Wireshark but see nothing, we torch the towers and they > don't show much unusual. We're thinking it might be a deluge of traffic > between Site B and C and are thinking of putting a PC at the C tower to > run diagnostics there. This is very manpower heavy as we have to send > people two places and average down time is one hour to do this. We are > going to turn our network into a routed network this Summer but that > doesn't help now. Any ideas would be appreciated. > > Forbes > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- > ---- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
