Ok, forget FB and FS for this exercise. Has anybody actually measured the gain of a yagi vs something like a rotary dipole.... at the same height ? A lot of yagi vs dipole comparisons are not done ri
As I recall, that was part of the testing of a dozen of so Yagis that N0AX and K7LXC did about 15 years ago. I've loaned my copy of the report to my neighbor, W6GJB. You can buy it for about $25 from
Comparing a dipole to a yagi is easy to do with any antenna modeling software and I would trust the results. Regarding comparing a tribander vs a large monobander, I have tried comparing various ante
Regarding comparing a tribander vs a large monobander, I have tried comparing various antennas and stacks and I often find the difference very hard to notice on my transceiver's S meter. I think wit
Jim T.: I concur that 'AX and 'LXC's book is well worth the price. It convinced me to go with the Bencher Skyhawk vs the F12 offerings at that time. (Same specs, lower $.) 73 de Gene Smar AD3F As I r
Hi Jim, To get the same signal strength -4db compared to the 3el yagi on low angles with your dipole that dipole must be mounted much, much higher then the yagi and even higher with more elements on
Author: Bryan Swadener via TowerTalk <towertalk@contesting.com>
Date: Mon, 24 Nov 2014 21:36:15 +0000 (UTC)
There's more to it than forward gain for the signal you WANT to hear. F/B and F/S rejects signals you DON'T want to hear. Otherwise, everyone would just use omnidirectional antennas. I like that QRM
I look at that quite differently. I mostly design/choose TX antennas for max gain in the desired direction(s) and elevation angles over the desired bandwidth. I mostly design/choose RX antennas for m
Jim, I did exactly that when I was developing the hexbeam. I had a reference dipole at the same height on a different mast, "pointing" in the same direction. I A/B switched at 1 sec intervals while l
Hi Steve, You probably measured arriving signals with qsb so you just proved your method being wrong, otherwise the result would be always the same. You need to measure and compare the major lobes ju
Peter, The method is not "wrong" - it's just "difficult"! The results will *not* always be the same, because the two antennas were spatially separated and the incoming sky-wave signal had time-varyin
Hi Jim, To get the same signal strength -4db compared to the 3el yagi on low angles with your dipole that dipole must be mounted much, much higher then the yagi and even higher with more elements on
Dear OMs, I have much to learn. Surely a dipole or Yagi has a certain maximum height beyond which not much is to be gained by going higher even for DX - QST did a study of the optimum height for a Ya
On Tue,11/25/2014 12:18 PM, Doug Turnbull wrote: Surely a dipole or Yagi has a certain maximum height beyond which not much is to be gained by going higher even for DX - QST did a study of the optimu
I know boom length is important but are you saying that given a long enough boom that a three element mono-band Yagi would outperform a six element Monobander on a fifty foot boom. The additional el
yagi.... both at 70 feet.At really low angles..say 0-10 deg..... will the 3-el yagi have even more than 5.2 db of gain ?? Or put another way... even though 70 feet = aprx 15 deg take off angle of ma
There are Tribanders on the market with more then three elements per band, For example the Optibeam 21-3 with 5/5/11 elements on 20/15/10. Concerning height, 1-1.5 lambda antenna height is generally
While it's fun to mess with antennas, anyone serious about DXing should keep in mind the advice from W1GKK, the all time DX leader: "Be there when they're there." W1GKK is the only one to have worked
WOW -- A European who actually WANTS to work the West Coast! :) 10M openings between Northern California and EU are pretty rare, especially on contest weekends, but it can be a lot of fun when they h
yagi.... both at 70 feet.At really low angles..say 0-10 deg..... will the 3-el yagi have even more than 5.2 db of gain ?? Or put another way... even though 70 feet = aprx 15 deg take off angle of ma