[TowerTalk] Re: Stacking Log Periodics

[i4jmy@iol.it]

> The professional way to stack LP antennas is to TILT them so that they
> would touch each other if the booms were extended to the front.  The 
tilt
> angle is about the same as the slope from the elements tapering.  This
> tilting of the two antennas, the top one down and the bottom one up,
> is necessary to keep the (log) periodic symmetry of the antenna which 
is
> what makes it broad banded, not just in SWR performance, but also in
> terms of the pattern.
> 
> Terry Zivney, N4TZ/9

When the aim is to cover a wider range of wave angles, whose is the 
main purpose of stacking at HF, this VHF/UHF technique that cares about 
gain and pattern may not lead in placing the antennas at proper heights 
from ground.

73,
Mauri I4JMY 


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