A lot higher than 4-6 wavelengths. I ran a 10m yagi in EZNEC at 200 feet QUESTION: YES- EZNEC GIVES US A GENERAL IDEA... BETTER THAN NOTHING. BUT HOW ACCURATE IS IT? BUT WHEN EZNEC WAS CREATED JUST H
VARIABLES EZNEC uses the NEC-2 engine, which was developed for the US Government, at great expense, and is the best thing currently available short of NEC-4, which is very expensive to end users, eve
I like these questions....I am a "show me the real data" kinda guy. This debate reminds me of the story from Medieval times when a group of Monks debated for a couple of years how many teeth a young
somebody, find Speaking and to is... ________________________________________________________________________ Where do you get ICE bandpass filters & beverage matching boxes? The same place that pays
of Some the forth, is measurements? of answer Unfortunately in the real world you are not going to find a station where you could take those measurements that is not encumbered with stuff that would
So instead, we assume can use a model and get accurate results 100% of the time that apply to the same situation? Or am I missing something? 73, Tom W8JI W8JI@contesting.com ________________________
I think you are. The US Government spent a lot of money doing tests to verify that NEC-2 and 4 represented good approximations of the real world. The situations in which this approximation breaks dow
As a person who has not used an antenna modeling program since the Commodore 64 I find this debate interesting. I know that there exists people who find computer modeling absolutly fasinating. That's
place around up was each If you stay within the limitations of the model's methods, which for nec have been pretty well documented, then you should be able to compare models to each other. The 'accu
As I recall, Roy Lewallen said he could find little if any verification of ground influences on low frequencies. I think they can to, as long as we remember what models are. My point is this: If we
N4AF has his antennas in the middle of a BIG, FLAT, slightly soggy meadow, water table no lower than maybe 5 feet, about 30 feet MSL, to north through east sloping very gradually to Pamlico Sound, ab
Tom, I think you're getting the horizontal and vertical polarization cases mixed, with maybe also a little too much focus on the 160m case. In his book, Dave Leeson observes that ground characteristi
Pete, I've been watching some of the replies on modeling etc. Perhaps there is some confusion over what antenna modeling software is doing and how it is done. I'll try to put it all in perspective. L
I guess then we can ignore things like buildings (with wiring), the slope of the grade, utility lines, and other conductive objects and still accurately predict results within ten feet of effective
I don't think you read my whole message. Modeling with NEC has been used to compute the effect of aircraft carrier superstructure in the vicinity of antennas, so I don't think what you describe is ou
Absolutely. That was my point all along. 73, Tom W8JI W8JI@contesting.com ________________________________________________________________________ Where do you get ICE bandpass filters & beverage ma