My new tower is 200 feet from my new (unbuilt) shack. Should I put the polyphasers at the tower in the NEMA box or at the shack in the NEMA box or does it not matter. There is a ground cable betwee
I have mine mounted outside the shack directly on a BUSS bar going to the ground ring. (Which is also tied into the tower ring) I also have BUSS bars at the bottom of each tower with ground kits on a
They should be at the shack entrance panel. it sounds like you have a common misconception about the 'Single Point Ground' concept. THE SPG is the point where the cables all come together and enter t
At the base of the tower with a good path to a ground system at the tower is better. Best would be to also have a perimeter ground at the shack and another protector at the entrance. 73 John N5CQ My
Larry: It depends. I have my Polyphasers at the NEMA box at the tower base, but I also have a remote coax switch there, too. I connected the Polyphasers between the coax and the switch so that each c
And it appears that you might have some misconception as well. That single point must also have a low impedance bond (SHORT, BEEFY) to ALL other grounds in the building -- all ground rods, the mains
I disagree (and agree with K1TTT) -- lightning protection devices are protecting you radios by short the voltage on the center conductor to the shield. They cannot do that at the tower -- voltage can
What if you have arrestors at the tower AND the SPG at the shack? Chris KF7P I disagree (and agree with K1TTT) -- lightning protection devices are protecting you radios by short the voltage on the ce
Earlier this year I buried a lot of Heliax and rotator wires in a 250 foot long trench going from my tower base to the house. The wires were not connected at either end and were not touching the towe
You're supporting the economy, but nothing else. 73, Jim K9YC _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesti
Jim: You overlooked my caveat in my original e-mail: I have a remote switch in the NEMA box at the base of my tower. Had I installed the Polyphasers at the shack end, only one coax run (between the s
TT: I re-read this and my earlier post. It may not be clear that the Polyphasers to which I am referring are on the ANTENNA side of the remote switch, not on the shack side. Hope this clarifies what
That's the way my lightning protection is configured. The tower has it's own ground system consisting of a Ufer that bonds together the rebar, tower legs and 50' radials from each leg. 8' ground rods
But this still raises the question of "why". As most one here have agreed the inactive ports on the switch should be grounded. That is even better than a lightning arrestor and only takes a few minut
Gene, I didn't misread or overlook it at all. The function of an arrestor is to protect sensitive (and expensive) electronics from a strike. ALL IT DOES IS SHORT THE COAX. That remote switch is neith
Nothing wrong with having cheap "spark gap" connectors at the tower. Worst case they don't do nothing, best case they short some of the largest lightning induced pulses out before they reach your (mo
Let's look at two scenarios with respect to tower mounted protectors: 1) Direct hit - protector fries (or at least breakdown device requires replacement) or relay fries. Relays and protectors cost ab
Agreed that protection devices should be at the shack entrance. But further to that they should be located on your SINGLE POINT GROUND PANEL at the shack entrance. The whole idea is to make sure tha
Of course most of us do have 'spark gap' protection at the tower and shack end automatically. Just look at all the short gap paths on so-239's that are typically used on baluns and switchboxes, in mo
What word or phrase might best describe the above-- anomaly, metaphor ...? "close as practical" is variable? "anywhere else is a waste of money" is discrete? I am not nitpicking--just curious! _____