Hello Group I have 100 feet of 45G tower and would like to put up a 36 boom Mosley Pro-95 multi-band antenna. I would like to find out how high I should put the antenna in order to get the best perfo
First of all, the best height for Mosley antenna installation is in the box on the floor of your garage. Apparently you haven't read the K7LXC and N0AX tribander comparison report where we test 2-3 d
There must be hundreds of posts on 'optimum heights / takeoff angles in the Tower Talk archives. Bottom Line: NO SINGLE Height will cover ALL of the angles supported by the ionosphere. You need BOTH
I once used 2 of the same 3 element 15 meter yagis simultaneously from my old QTH in South Carolina. One was at 70 feet on the tower top and was rotatable. The other was fixed on Europe at 40 feet. B
You mean the information you can't read unless you pay $17 ? John ________________________________________________________________________ This list is sponsored by the new eHam.net Store. When you b
I think band and sunspot cycle phase have a lot to do with this. Certainly, as N4KG says, if you can have multiple antennas there are lots of reasons to do so, including but not limited to stacking.
I've got 4/4 on 20m at 100 and 50 feet. The stack is usually louder to Europe BUT: often in the afternoon, maybe 1900z or so, the lower antenna is signifantly better, a couple of "S-Units." I rarely
Hey, I have no problem with people being paid money for work they have done. Maybe some people have forgotten that in a society where people are free to do as they please, there evolves a system in w
My understanding is a yagi performs as good as it possibly can when it is 1 electrical wavelength above the ground. Any additional height is redundant. 73, Dave Hough, W7GK Elko, NV _________________
TT: It's money well spent. I bought both copies. The first convinced me to look at the Bencher, the second convinced me to buy it. No regrets. 73 de Gene Smar AD3F --Original Message-- From: brewerj@
Dave, look at W3LPL, KC1XX et al, with 200-foot-high yagis on 20 and 15, and ask yourself whether people who build stations like that would waste their money if one wavelength high was enough. 73, Pe
Dave, "...as good as it possibly can..." is in the eyes of the beholder. To where do you wish to communicate? (place on the earth, or elsewhere) When do wish to communicate? (Time of day, season, sun
An excellent "book" on this subject was published in 1993 by LTA and the Radio Bookstore. Book is by R. Dean Straw, N6BV, titled "All the Right Angles". The book is full of detailed data, charts, com
Much of this is in the current ARRL Antenna Book, which also includes a disk. It will tell you the arrival angle from various QTHs so that antenna heights can be calculated to take advantage of the
I think that over-simplifies the rule of thumb. Think of it this way -- horizontal yagi's just start to become effective at about 1/2 wavelength. Lower heights tend to distort the pattern. Heights ab
But these guys don't just put one antenna on these high towers. They load them up with yagis all driven in a stack. I'm sure these guys rarely find conditions where a SINGLE yagi above 1.5 wavelength
Happens all the time in contests. But that isn't the point. Contesters need/want an infinite number of antennas from which to choose for every condition that may occur. It's a matter of expense and h
SNIP I recall that article also. To me, his observations are highly suspect. ANY antenna higher than 3/4 WL will exhibit a NULL in the vertical pattern and ANY antenna around half that height will fi
Those observations seem reasonable to me. If you had 2 high stacks on 10 and 15M with the bottom antenna at 40 ft, I expect you would observe more incidents of the low antenna being better. Location
I have 3 TH7s on one tower - 25, 40 and 76 ft. There are plenty of times the TH7 at 25 ft is better into Europe than either of the 2 higher antennas or the upper 2 phased, on 10m. The lowest antenna