Im laying out the ground rod scheme for the towers. As I look at Mot R56, it seems like about 45 of rods gets you to the 5 ohm target based on one of the graphics they provide Thats about 9 ground ro
In one of the Polyphaser documents they talk about the rise time and length of a strike duration. Forget the details but the conclusion was that rods further out than about 50' would not be effective
One of the docs that refers to the 50/75 is the Ham Radio Grounding doc. On fresh look they say the radial should be 50-75' in length referring to the 50' as "minimum". So I guess that makes the basi
Oh, I should have said that there are rods at the base of the concrete pad edge, with a connection from each of the 3 rods up to the tower leg. That was put in to get a positive response from the cou
I put the arrestors at the coax feed points into my shack at the home run panel location. And also out at the tower base on the termination of each antenna stack feeder. The reason for that is I want
I'm looking at the exact same scenario Bill. I have been poking around using AutoEZ (a front end for EZNEC) where the guy has cooked up a comprehensive model for the 4-square inclusive of a hybrid co
That is exactly the value of something like AutoEZ. You don't have go by gut feeling making a guess, or based on subjective opinions of others. You can KNOW the implication before making the physical
But you are talking about a 4-square and not a vertical. So this experiment shows that a vertical with a fatter element is more broadbanded and that certainly implies the same with a 4-square, but it
What about insulated stranded? You give up some of the ground to conductor surface area but the wire compared to the rods is a pretty minimal part of the network. Right? 73/jeff/ac0c www.ac0c.com alp
MMana-GAL has basic optimizing and it's very popular in EU - freeware. I learned modeling using MMANA but eventually stopped using it because everyone that I talked too used EZNEC and getting help wi
I have 3/8 and 1/4 guy ends on the ground end of the fiberglass guys. Looking for ideas on how to check rough guy tension absent a Loos gauge. Assume there has got to be an alternative method of some
Stan is a much better modeler than I am so in my case (4-ele 17m + 3-ele 30m on same boom, separate feeds) I would not say "sure, no problem." However AutoEZ can do some tricks that make working on m
For a basic yagi, multiband or otherwise, NEC2 works fine. Where NEC4 provides an advantage is with unusual geometries and features in the ground. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie
I used e-rigging for the towers I put up this summer. While I have no reason to doubt their specifications, where possible I ordered stuff a couple of sizes bigger than needed just to be on the safe
The issue is not the value of the actual Z. The issue is that the reported peak Z frequency can be very far removed from the true value. Hence the problem. If you build a monster Z choke but it's
Based on my experience with the zillion places that restrictions can reside, I would strongly recommend you engage with Fred K1VR so he can help you check out potential QTHs. The problem is that the
John is right. But the issue is not about a personal attack - it's one of specialization. The typical real-estate agent is like a GP where K1VR and the few other guys in that field are the knee rep
Is Andrew FSJ2 suitable for outdoor use? 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com _______________________________________________ _______________________________________________ TowerTalk
Hard to use a Loos gauge on bigger EHS though. I've got 3/8 EHS on my top guys and when I hold the Loos up next to it, the EHS just laughs and calls me silly names as the nearly unbendable 3/8 EHS l