Topband: Re: Short Vertical...

[Tom Rauch]

Hi Roy,

> With the good ground system you mentioned, this can be an efficient
> antenna, considering its size. It can be used with a top hat or tee top as
> well as alone, with improved efficiency (due to raised radiation
> resistance) and bandwidth.

The "radiation resistance improvement" of a folded element is a 
myth that unfortunately even appears in some west coast 
handbooks.

Ground loss remains absolutely unchanged as a given size radiator 
is changed to a folded configuration. The only thing that changes is 
the impedance the feedline "sees".

While there are many good reasons (most of which you pointed 
out) to use a folded element, reduced ground loss certainly isn't 
one of them.


73, Tom W8JI
w8ji@contesting.com



--
FAQ on WWW:               http://www.contesting.com/topband.html
Submissions:              topband@contesting.com
Administrative requests:  topband-REQUEST@contesting.com
Problems:                 owner-topband@contesting.com