Blank Hi All Why the heck do I bother putting down all those radials under my verticals?? According to one article, 1 radial is best because it gives the antenna a real wide bandwitch, SWR is close t
That is not a lot of gain.. What band where you thinking of using? That is a long horizontal wire to hold out and rotate for just 3dB I modeled a vertical with one resonant radial and yes it slewed t
The question is "gain over what"? Gain over a vertical with 36 radials? I wouldn't think so! 3 dB of gain in the direction of the radial over the gain in the opposite direction? Possibly. Even though
For all practical purposes, a vertical with only one radial doesn't have "gain" in one direction ... it merely has more loss in all other directions. That may be useful if you need enough pattern to
I think the article in question was in NCJ describing inverted L antennas for 160 and 80. It surprised me too. The main point was to put only one radial to have antenna close to 50 ohm so no matching
Hi All, The ARRL used to publish a spoof article for the April edition of QST in years past. Given Dave's comment here about editing for grammar and context it could be fun to create a spoof article
Hi Tom, If you put a vertical with just one elevated radial on your rotator it is nothing more then a bend dipol. A dipol in theory might have 3db gain against a quarter wave as you doubled the numbe
It is clearly only additional ground return loss that is giving that effect. You could achieve the same broadbanding effect except with uniform directivity by just putting a 17 ohm resistor in series
Because more radials reduces the total loss, increasing the overall EFFICIENCY of the antenna system. Think of the EARTH as a big resistor added in series with the antenna. A lot of radials causes th
Tom is correct when he wonders about these posts. SWR close to 50-ohms, and wide antenna bandwidth, is not an indication of radiation efficiency. A lobe in a particular direction is only meaningful i
YES. The average issue causes me to cringe at least once, and usually more than once. And I'm not talking about anything that might have been written by the late Larson E. Rapp, WIOU for publication
YES. It's important to understand the difference between GAIN and DIRECTIVITY. A Beverage may have 10dB or more of directivity, but gain of -20dB. Last summer, I labored mightily to build two sloping
I still have a sense of amazement when the antennas I put up seem to fit very well into the EZNEC models, especially since I've been playing with various wire arrays, some quite large. If they don't
Please define the gain in this case. 3db in relation to the other direction (IE f/b) or actual gain over a dipole or dbi? It has to be in reference to something. 73 Roger (K8RI) _____________________
Why spend all that time building verticals with extensive radial systems if all you need to do is put one up with 4 radials and just switch the radial in in the direction you are trying to work? Gues
Well, you might notice a couple of db F/B with that one radial you selected. That would be a big win with the overall antenna maybe 5 to 10 db down from a decent radial system. Verticals at salt wate
Author: "Ronald L. Rosson Jr." <kf5jra@oneinsane.org>
Date: Sun, 18 May 2014 08:02:37 -0600
This wouldnt happen to have been the CrankIR review in QST, would it? -- 73 de KF5JRA Ron _______________________________________________ _______________________________________________ TowerTalk mai