Hi Jack, At this point "proven" is far too strong of a word, or the proven part is not readily available. Nothing I've read was "proven", except a new different system made some people happier than
are dozens of ways to accomplish the same thing. All have about the same result. There is no universal solution that makes every 50 foot backyard look the same, let alone look like 50 acres of flat
Let me throw this out for comments. I think I found a valid test for the theory the FCP does not radiate, and thus does not have ground loss. My countering statement was it cannot be a counterpoise,
Hi Guy, I think it is a critical issue, because it demonstrates the difference between EM radiation and induction fields that only store and return energy to the system. Then the question arises, how
I posted the values. With zero loss wire real part of impedance impeance is less than 1 ohm. I believe the way to do this in a model is to use lossless wire. With zero loss wire, all losses are caus
Very interesting discussion. Can't we quantify our ground systems by placing RF ammeters at the feed point? >>>>> No, we cannot obtain reliable useful information there. If we want to know field stre
I'm not sure where that idea started, but using a folded element does not change ground loss one bit. 73 Tom _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
I believe the idea was not in QST, because at that time QST had good technical editing. There were very few gross technical gaffs in QST back then. As I recall, the idea originally appeared in eithe
I don't think any anyone with an experimentation (Edisonian), engineering, or science background would assume a few errors (or even a few dozen errors) automatically means we can't trust anything an
Any antenna that increases bandwidth through a resistive termination will always lose a substantial portion of power as heat on bands where the resistive termination is correcting mismatches. There
So gently getting back to the topic of the original post which was: Getting thoughts on relatively simple and relatively inexpensive portable 160 m antenna, potentially deployable by one person, that
So I modeled a half wave dipole in free space and sure enough the wire segments on each side of the feed point carried equal current. I then placed a resistive load at the center of one half-element
I think you may be selecting the wrong type of source, if you are using EZNEC. In the source-type selection, chose "SI", not "I". A split source places the source at a segment junction, so you can s
Hi Bill, That must be a problem, too. The entire concept of using 60 Hz, or any frequency far from the operating frequency, is just bizarre to me. It seems like once someone publishes an article, eve
The fact modeling programs allow perfect sources right at the wire also allows building antennas in models that cannot be built in real life. This has happened several times with antennas. One case
<I had read in a Hand Book for the 1930's the 3 wire folded dipole and 2 wire folded dipole had a couple factor of 1. This would make this antenna the preferred driven element for a long yagi.>>> Why
Yes, we can. Kirchhoff's law is Kirchhoff's law, and is not frequency dependent. I can't imagine anyone thinking otherwise. Thinking Kirchhoff's law applied only to dc circuits is like thinking Ohm'
Me, too. I know people say it causes problems, but I've yet to ever see any problem or sign of any problem. I've used it or similar for many years. :-) Same here. 73 Tom ____________________________
<You said "3.) Use the largest counterpoise possible, and use one that does not concentrate current, zig-zag current all around, or produce unnecessarily high voltages." In 300 words or less please e