[TowerTalk] Vertical comparison question

[n8de at thepoint.net]

Those who have heard my 80/40/WARC signals may be aware that I am  
using an insulated tower vertical (photo on qrz.com).

This antenna on 40m is a 1/2-wave vertical.  Estimates of feedpoint  
impedance are in the 2000 ohm range, but I feed it with 50-ohm coax.   
There is also a 40m 1/4-wave vertical available for use on that band.   
Both verticals have 60 1/4-wavelength radials spaced equally about  
them. (on the ground).

Comparisons are interesting, depending on DX distance.

 From here in Michigan to the Caribbean, the 40m vertical seems a bit  
better (one s-unit in most cases), but for JA and YB, the difference  
is quite astounding!  While the 40m vertical 'hears' those areas quite  
well, there is a 5 S-unit difference in favor of the 80m vertical!  My  
concept of this difference is 'take-off angle'.

I have NO IDEA why it works so well with that 40:1 feedpoint SWR, but  
I will never complain.

73
Don
N8DE

> On 4/5/2013 6:56 PM, John G. wrote:
>> How do the "radialless" verticals, like the R5, R7000, MA5V, Gap   
>> ones, compare in performance to the standard 1/4 wave verticals   
>> that are roof mounted with radials?  Does one tend to outperform   
>> the other?  I am looking how each performs for DXing and longer   
>> haul communications.
>>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk