Noted some number of times. My approach is to ONLY ground the two extreme 20 meter elements on the C31XR (top antenna) since they are the longest and provide the longest extension for top loading any
**NOT** "belt", but climbing HARNESS from Champion Radio, with a fall arrest lanyard hooked above you. If you ever slip with the belt loose, you will thank the day you bought it. Try champion radio:
Copperweld will sproing into a snaggled mess 25 years from now if you let it go, especially #12. The answer for that stuff, which will stay up in the air forever, is NEVER, EVER let it out from under
That F12 was fine when the ice melted. That's the usual story with those. Wasn't it an inch of radial ice on the F12 pictures about a week ago? I wonder how the F12 turned out. We had gusts of 85 Kph
I've seen 'em like that. The wisdom of having it bendable (aggressively tapered) is why the elements are in a bow shape and will recover when the ice melts, as opposed to a V shape that will stay tha
I have gone through the trouble to model a tower with beams, etc, and monkey around with lengths, attachment points, different tower heights, etc. The complex model behaves essentially like a more ma
I know that TA does not compute interaction, just simply because of the way it works. TA takes the free space pattern of the antenna as input. So any possible cross-coupling between elements is only
I have a run of inch & 1/4 hard line up my 80' tower. When got it up and clamped down at the top, was very surprised to see how much it whipped around in the wind. I wound up clamping it to the tower
Plain solid copper wire (not stranded, not insulated, not copperweld, not stainless steel) is the best. Commercial copper radial fields have been in the ground without any degradation, some pre-WWII.
linemen & cable splicers about where cables ought to be. In the air, ice weighs 'em and brings 'em down, in the ground backhoes get 'em. On the ground mowers get 'em. In the air hunters shoot 'em. O
There are THREE variants of losses to a vertical system related to the ground. 1) resistance loss from using the ground as 1/2 of the circuit for a traditional, base-fed vertical. Consider the dirt a
system in general. there is no magic bullet.... Making a dipole out of a Marconi-feed structure of given dimensions quadruples the amount of loading reactance required, all things equal. That quadrup
The elements are. Except I uninsulated the 20m reflector and director. These are the longest elements and will control how long the boom plus elements appear. A careful modeling of tower, mast, C31 b
Does not work that way. Model it. It will surprise you. The trick to understanding how it works is to visualize the system as a collection of point impedances coming back from the high voltage zero c
This fell the same way that the 2000' Raleigh TV tower fell ten or so years ago, straight down, crushing itself as it went. The guys never came loose, with equal pull, even as falling, especially wit
This is a result that might be shown by a cable that has sustained a lot of damage, including crushing without shorting, corrosion, water invasion. What frequency were the Z *Maximums* (odd-quarter w
Careful modeling will show that in the presence of non-linear excitation of the guy wires (like the flux from the antenna cuts more on one end than the other, as in level tribander and down-angle guy
I have the impression you have a small backyard. What are the dimensions or what kind of space is available to you? Some of the answer might have to do with what you are going to do with the second s
For what it's worth, I've had good luck with flex-weave, by doing the following: 1) Only use the type with the insulating jacket. 2) Never run the wire through a pulley or loop so that the wire goes
Or accidentally let one end of it twang loose up in a tree. When I left the house in NY that I had lived in for 13 years, one big oak at the edge of the property still had a tangle of copperweld up