Hey folks.... I am very familiar with the "models". Does anyone have hands-on A/B experience with these two antennas that can share their actual findings? I'm talking in the 40M-20M range. 73 John K4
I've done a lot of comparison testing. First of all, a half wave vertical is not very much different in performance from a quarter wave vertical. And a half wave vertical fed at the bottom is very li
I did that comparison on 40m with dx stations only and it was a big difference. I used a L-tuner with my 1/4 80m vertical above 3km of radials 20-30m long and used an inverted-V dipol at 30m height,
The NEC model in the link I just posted shows why -- a vertical is directional ONLY in the vertical plane, while a dipole is directional in both horizontal and vertical planes. In other words, the di
I did that comparison on 40m with dx stations only and it was a big difference. I used a L-tuner with my 1/4 80m vertical above 3km of radials 20-30m long and used an inverted-V dipol at 30m height,
Are you talking apples to apples? I thought the question was a vertical dipole vs a horizontal dipole of the same size. It sounds to me like you have a vertical with radials vs a horizontal dipole ..
A 1/4 wave 80m vertical series fed on 40m is nothing else then a halve wave vertical on 40m which was questioned about. A vertical dipol can be fed at one end, center feed is no must. Radials are use
I dare say that radials are useful under *any* kind of antenna. Anything we can do to decrease ground losses is a Good Thing. A vertical 1/2 wave antenna isn't fed "against" ground as is a 1/4 wave v
The bobtail curtain array as well as the halfsquare is using vertical elements a 1/4 wave high. Feeding a half wave vertical from top or bottom makes no difference at all, it is high impedance at the
thanks -- I am learning all the time. Thanks for knowing it was a serious question. Happy trails. // K8JHR // == == _______________________________________________ ___________________________________
<<<A 1/4 wave 80m vertical series fed on 40m is nothing else then a halve wave vertical on 40m which was questioned about.>>> No, the question had to do with one half wave length DIPOLEs, vertically
The current in an end fed half wave "monopole" is virtually identical to the current in a center fed "dipole". Although the feed systems are different, the results on the air will be extremely simila
Yes and no. Remember that one of the most important properties of any antenna installation is how it interacts with the earth in the far field (that is, what does the first reflection do), which is s
I said a HALF WAVE vertical fed from the bottom is essentially the same as a half wave vertical dipole fed in the center. I wasn't talking about ground mounted quarter wave verticals. However, now th
My half wave vertical on 40m was not fed against the ground screen anyway, the radials were just underneath. But even fed against that ground screen would not change anything, there is no current flo
L.B.Cebik would agree with this. His modelling of a center-fed inverted-L (basically a 1/2 wave inverted-vee rotated 45 degreees to put one leg in the vertical plane) showed insignificant improvement