"Do Polyphaser lightning arrestors drain static? I thought they only shorted to ground after reaching a preset high voltage. He was only measuring 7 volts maximum on his coax. If it did drain at 7 vo
"Something to bear in mind is that, in general, most jurisdictions don't bother enforcing the NEC for amateur radio antennas" Which actually is too bad because these guidelines are exactly the measur
Even though a second floor shack is not optimum, installing a well designed grounding system is not out of the realm of possibilities. Polyphaser has a good technical article discussing exactly this
Did you have a SPG? Was it tied to the service entrance ground? How about a shack ground and the computers tied to that? Most likely is that strike induced current in your house wiring and that found
My electric service is underground, running about 450' from the service transformer to the polebarn garage in the rear of the property. At that point there is a SPG for the electric service, but then
No need for a separate down conductor. The tower is metal and can handle the surge energy. I can't comment on the ufer connection but you'll also want to have separate ground radials connected to eac
Three sections of unguyed 45G is the norm during tower erection. A little tippy but very do-able and safe. As far as temp guys, you may not need them depending on your tower base. If the base is imbe
The tram system that I used (borrowed) used Phillystran for it's tram wires. Phil KB9CRY _______________________________________________ _______________________________________________ TowerTalk mail
So looking at using either the 3/16 (770 lb. pull strength)or 5/16 (1700 lb.)dacron for guys, as opposed to Phillystran because of the cost. Just not sure how much I can trust the dacron's longevity.
A well designed lightning ground will also make an excellent RF ground for a vertical antenna. If it will not serve as an RF ground then it is not an adequate lightning ground either. No not really.
Note again that I did NOT say that a good RF ground was necessarily a good lightning ground. I said a good lightning ground WAS a good RF ground. If it will not serve as an RF ground then it is not a
I believe other parts of other codes allow for a ground rod to be driven right at the electrical service entrance and will serve the same safety purpose. That's how it is at my house and I also don't
Even though a search through the archives will reveal the same information, many times over the past number of years (at mulitple times per each year), I'll state my understanding of the good practic
I agree with the above statement but in my personal case I have SO many cables a massively large single panel is not doable. So I have four Hoffman enclosures which are mounted next to each other an
I can't imagine not doing anything. Some folks out there are just lucky and they should buy lottery tickets. I know that I have a complete grounding system and it didn't cost $20,000. Maybe 1K and lo
The real problem are the PE's, the least expensive quote I have received so far is $350, and that's if I do the drawing and spec the rebar cage!! That's the average and to be expected cost. I find it
If you are putting the second thrust bearing in so it can be run loose and only tightened when you need to pull the rotor for maintenance that would be O.K. Excuse me, so you're going to depend on si
I wouldn't use anything but Phillystran. In addition to the strength, I think it looks a whole lot better than guy cables and big insulators. My own opinion though. And I wouldn't use anything but Po
ICE makes arrestors that will pass DC. http://www.iceradioproducts.com/impulse1.html#1 _______________________________________________ _______________________________________________ TowerTalk mailin
Erico (CadWelds) invented these and this style of exothermic welding. They've been in business longer. UniShots are the new kid on the block. Both ought to do the same job. __________________________