Good point. Modeling Yagis and optimizing with Auto-EZ is instructive
in how much one change changes a lot else. Watching the automatic
optimizer try to find the several dimensions of target values shows
this. Having designed a two band interlaced 30/17m I gained enormous
respect for those designers with proven performance multi-band designs.
A lot of hours at the PC. Plus I wonder about how designers got it
right in the "old days". My solution to the mount modeling problem is
all insulated elements.
Grant KZ1W
On 4/22/2020 06:38, Chuck Dietz wrote:
Hi Tom,
I don't think you are taking the right approach. I don't think you can just
"tune" one element of a Yagi antenna. You need to measure all the element
sections and placements including the element mounts and run them through a
computer design program. Changing any dimension will affect the other
dimensions to some degree. If it is a commercially sold Yagi, the file will
already be available and can be used to optimize the antenna.
Chuck W5PR
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