Steve, yes, you're the second person to mention that characteristic.
Although it makes sense now that you mention it, I really didn't
appreciate that difference. I suspect that the detuning step would be
worthwhile anyway, and several other respondents have offered some good
advice on accomplishing that..
Thanks and 73,
Joe
K2XX
Steve Maki <mailto:lists@oakcom.org>
Monday, July 30, 2018 9:23 PM
I've just recently been reading up on Waller Flags, and am certainly
no expert, but my impression so far is that an HWF (horizontally
polarized flag), mounted up in the air on a tower, should be less
affected by tall vertical thingies in the area; and less prone to
local noise in the area which is normally vertically polarized, all of
which is a major attraction of the antenna. So if your nearby
horizontal items are not long ones in terms of wavelength on the
frequencies of interest using the flag, I wouldn't expect a problem.
If your plan is a vertically polarized flag, than ignore the previous
comments.
-Steve K8LX
On 7/29/2018 6:58 PM, Joe Giacobello, K2XX via Topband wrote:
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
Joe Giacobello, K2XX <mailto:k2xx@swva.net>
Sunday, July 29, 2018 6:58 PM
I am hoping to construct a Waller Flag RX antenna on a 56' Heights
aluminum tower for 80 and 160M RX. The ideal location from aesthetic,
RF and maintenance-of-a-civil -family-climate standpoints is midway
(150' separation) between two existing LM-470 towers now separated by
about 300'. One has a 4-element Steppir and a 13-element 2M yagi on
it and the other a 2 element 30/40M quad. Obviously, the WF would not
be used simultaneously as the two existing antennas, and the Heights
tower would be well grounded.. Am I asking for a round of battles of
trying to mitigate interaction problems on either TX or RX on any of
the bands involved? Would an easy answer to my question be obtained
from an EZNEC simulation, especially since I already have models of
the two current antennas?
I suspect other people on this reflector have been here before. I'd
appreciate any practical advice.
Many thanks and 73,
Joe
K2XX
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|