That has been pointed out to me now. Living out west we think different. Guess the horse I use as a rotator is not as reliable as I thought. 73 Jim _______________________________________________ See
Quite true - in fact, my contingency was that I would apply to the HOA first, and if they did NOT approve the tower installation, the contract would be null and void. It was interesting how quickly i
degrees from South America to JA land? Looks more like 90 degrees to me. The difference is 184 degrees. Tom, NI1N _______________________________________________ See: http://www.mscomputer.com for "
From Dave Hachedorian's (K6LL) posting: Those Steppir gain figures are very questionable. They are significantly higher than the gain figures for optimized yagi designs in the 20th edition of the ARR
For me the Steppir has too many moving parts way up the in the air. Anything mechanical will break sometime, and if it moves it will break quicker. 73 Jim ____________________________________________
are significantly higher 20th edition of the ARRL still just 4 elements element beam on the I don't know why anyone goes by any manufacturer's gain figures. The worse place in the world to learn any
Steve, For the "optimized" yagi's in the ARRL antenna book what were the optimization criteria? There is a tradespace between forward gain, pattern and VSWR bandwidth, and F/B. With a SteppIR you mig
snipped.... I would tend to agree more with Steve and Dave on this matter. There is simply no way in the world ( short of an advanced antenna range ) to determine how an individual element in the Ste
Author: "Richard M. Gillingham" <rmoodyg@bellsouth.net>
Date: Wed, 16 Mar 2005 12:08:39 -0500
Just a note, I don't want to get in an argument, especially since in the case of antenna design I'd be an unarmed participant. The entire SteppIR series of antennas has been extensively tested on an
-- My original message referred ONLY to an installed installation, and manual attempts to optimize it. Sorry if I confused anyone. 73 Ed _______________________________________________ See: http://ww
That is my understanding as well, the published SteppIR numbers have been verified on the range rather than relying solely on the analysis/design software numbers. -- R. Kevin Stover ACØH K2/1
tested on an That is my understanding as well, the published SteppIR numbers have been verified on the range rather than relying solely on the analysis/design software numbers.>> I can easily believ
-- But, those handbook designs have design constraints over the ENTIRE HAM BAND: F/R > 20dB SWR < 2:1 Steppir, since it changes its lengths as a function of frequency, can use a high performance, but
The SteppIR gain figures are confirmed by both YO and EZNEC. They represent achievable gains with a 22 Ohm feed impedance for four elements on a 32 foot boom and (relatively) narrow bandwidth. Feel f
Author: "Richard M. Gillingham" <rmoodyg@bellsouth.net>
Date: Wed, 16 Mar 2005 13:07:46 -0500
I don't know the name of the facility, Is there more than one at Moses Lake? The Mertel brothers, who own FluidMotion, may have conducted the tests themselves, or engaged someone else to do the work.
Even at only 20 db front to back ratio, if all the energy from the rear was redirected to the front instead, it would amount to less than .1 db additional forward gain. With only 10 db front to back
Not quite the way it works. Just because the feed is lower impedance and current is higher does not equal more radiation. Both current and voltage play a role in radiation. 73 Gary K4FMX ____________
There are two possible strategies: Do modeling, and optimize for desired performance, running several models with small variations to take care of tolerances. This will prevent you from getting into
Anything mechanical will break sometime, and if it moves it will break quicker. I considered that. At the same time, the only negative comments I have ever heard about the SteppIR are from those who
Same here - the negative comments seem to come from those who don't own one. Mine has been up for 18 months, survived heavy winds and up to 3 inches of ice - and keeps on ticking. Love it! 73, Joe WD