I run the ground wire directly to dedicated ground rod. We DO Not tie in to ring or grid. This is a straight shot...
Jaime Solorza On Jun 3, 2015 5:15 PM, "Edward Brooks" <broo...@mt.net> wrote: > So, to clarify things. These are Cyclone 2450-VS APs set to 120deg. > That said, the idea with the ground wires for the omni may not work. > A surge arrestor at the top and bottom (not part way up). > Try not to be the tallest thing on the tower. > Aerial at top with dedicated ground wire to ground rod tied into Tower > ground ring. > Does that about sum it up? > > -Ed > > On 6/3/2015 4:53 PM, Chuck McCown wrote: > > I have used them. I believe the theories. But I think you would have > to talk to broadcasters to get a good opinion. They don’t seem to be as > popular as they once were. > > *From:* Edward Brooks <broo...@mt.net> > *Sent:* Wednesday, June 03, 2015 4:51 PM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] Static & Nearby Lightning Issues > > Thanks Ken, > Has anyone had any experience with dissipators? Are they worth the > money and labor? > > -Ed > -- > Edward Brooks > > *Outside Plant Manager The Montana Internet Corporation* > 406-443-3347 X506 > > On 6/3/2015 4:35 PM, Ken Hohhof wrote: > > I would NOT put Cat5 surge protectors every 50-75 feet, you will likely > get Ethernet errors and/or negotiation problems. At most there should be > one at each end. > > You are probably thinking of coax, and even so I suspect those are shield > grounds, not actual surge protectors. > > I do agree with not making your antennas the highest thing on the tower if > you can help it. > > If you must use an omni antenna located at the top, I have had some > success with a COAX surge protector between the radio and the antenna. > Polyphaser makes some DC blocking types that work OK and aren’t too > expensive. If lightning hits, the omni is still probably toast, but it > might save the radio. > > *From:* Edward Brooks <broo...@mt.net> > *Sent:* Wednesday, June 03, 2015 5:24 PM > *To:* af@afmug.com > *Subject:* [AFMUG] Static & Nearby Lightning Issues > > Here goes... > We have a new 118' Super Titan Max tower that has been grounded per > manufacturers recommendations. Each leg is physically bonded (not > exothermically) to a 10' ground rod, all ground rods are then connected to > each other in a ring. The equipment cabinet is bonded to an 8' ground rod > and tied into the meter base grounding as well. The two ground rings are > then bonded to each other in 2 separate places. > With that said our issue has not been with the grounding, but with > the dissipation of static at the height of the antennas. We currently have > had the worst problems with the 3 Cyclone 2.4 antennas which are currently > located on masts at the top of the tower. We have also had issues with a > couple of the 5.7 Cyclones located below the top of the tower, but not as > frequently. The center-line of the 2.4 APs is 120' AGL, the height of the > tower is 118' AGL. We currently have WB-GigE-APC surge arrestors located > in the cabinet which is located 10 ft from the base of the tower. > After doing some research through various Cambium manuals and the > Motorola R56 manual, I have some idea what our issue is, but would like to > bounce those ideas off the community. My thought is that we neglected to > put surge arrestors at 50' to 75' intervals (as recommended by the Motorola > R56 manual) and 1 at the top for use in thunderstorm areas. Also we may > need to lower the APs to a minimum of 2ft below the top of the tower (per > the Cambium manuals for various antenna types). > Any suggestions or comments would be appreciated. What have you done > to mitigate this problem? Etc... > > Thanks, > -Ed > -- > Edward Brooks > > *Outside Plant Manager The Montana Internet Corporation* > 406-443-3347 X506 > > > > > ------------------------------ > [image: Avast logo] <https://www.avast.com/antivirus> > > This email has been checked for viruses by Avast antivirus software. > www.avast.com <https://www.avast.com/antivirus> > >
