Topband: Skimmer calibration

[Carl]

----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <topband at contesting.com>
Sent: Wednesday, August 20, 2014 12:48 PM
Subject: Re: Topband: Skimmer calibration


> On Tue,8/19/2014 7:08 PM, Tom W8JI wrote:
>> Radials under the vertical antenna have virtually no effect on wave 
>> angle unless they are sparse and grossly unbalanced, allowing them to 
>> radiate like a low horizontal antenna.
>>
>> Radials change the efficiency, not the pattern, unless the radials 
>> radiate like a dipole. 
> 
> On Wed,8/20/2014 9:05 AM, Tom W8JI wrote:
>> This is because the "often poorly understood" Fresnel zone extends far 
>> beyond practical radial field area, and virtually all of the ground 
>> wave attenuation from soil losses is miles from the antenna over the 
>> entire long length of a path. It is not localized loss. 
> 
> I agree completely with both of Tom's posts.
> 
> 73, Jim K9YC


You should, he didnt say anything wrong.