[TowerTalk] Tower and antenna decisions

[Joe Subich, W4TV]

Only a small portion of the LP elements carry significant current on
a given frequency - only a "few" elements are "active".  This means
that the gain of an LP is generally equivalent to a non-optimum two
element or short boom three element antenna at best.  Given the limited
number of active elements and the sub-optimal currents, side and back
rejection are generally significantly poorer than a well designed Yagi.

Log Periodic antennas provide coverage of a lot of "useless" spectrum
at the cost of efficiency, reduced performance in the narrow amateur 
allocations and substantial mechanical complexity.

73,

    ... Joe, W4TV


On 10/25/2013 12:45 PM, Jim Brown wrote:
> On 10/25/2013 9:38 AM, Gene Fuller wrote:
>> Would you like to add any comments regarding LP's.
>
> I don't know enough about them to comment.  I've only heard that their
> gain is relatively low compared to a Yagi with the same boom length. It
> has long been well known that the gain of a Yagi is related to boom length.
>
> 73, Jim K9YC
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>