I should add that these guys were insulated from the tower but not
broken up with insulators in an effort to avoid resonant lengths. Not
suggesting that this was good or bad, simply my observation that other
metal nearby can surely degrade a yagi's pattern.
73, Pete N4ZR
The World Contest Station Database, at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000 and
arcluster.reversebeacon.net, port 7000
On 9/19/2012 12:31 PM, Pete Smith N4ZR wrote:
I should also mention my experience with my shortened 40m yagi. It
was a dog, without much directivity, until I replaced my steel
tower-top guys with Phillystran. Wow, what a difference.
73, Pete N4ZR
The World Contest Station Database, at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000 and
arcluster.reversebeacon.net, port 7000
On 9/19/2012 9:56 AM, Steve London wrote:
Jonathan,
Before you conclude that your D240 doesn't have much pattern, run
some more tests on DX signals. From your QTH in Colorado, I would
recommend listening around your sunrise for signals from Japan and
the far east.
Are you still using the Bencher Skyhawk/D240 stack as shown in the
photos on your qrz.com web page ? Does the Bencher Skyhawk insulate
the parasitic elements from the boom ? If not, it is possible that
the combined electrical length of the boom plus the uninsulated
elements is close enough to a half wavelength on 40 meters to have
significant interaction with the D240.
73,
Steve, N2IC
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