W4TV wrote:
>>> The "diamond" option is interesting ... are the feedlines connected from
>>> feed point to feed point or are they all connected in parallel at the
>>> "balun box"?
I actually modeled both variations. In the graphics for the second
section on this page
http://ac6la.com/aecollection9.html
the wires view following the words "Here's a different variation; a
diamond shape ..." shows the one using separate feedpoints connected
via short, 12.5 ohm transmission lines. That one requires four
user-made transmission lines plus a 4:1 balun. Then the last wires
view at the end of the section, following "Another idea I tinkered
with ..." shows all the feedpoints ganged together like a normal
cobweb. That just requires a 4:1 balun.
In this zip file
http://ac6la.com/adhoc/Cobwebs.zip
the first variation is model "AC6LA Diamond Cobweb.weq" and the second
is "AC6LA Diamond v2 Cobweb.weq".
>>> Have you tried modelling a 40/30 meter version ...
Nope. But if any AutoEZ users would like to give it a go by changing
a few variables in one of the existing models I'll be happy to help
you out if you get stuck.
>>> ... and placing it 5 feet or so above/below a three/four element yagi while
>>> checking for any interaction 40 to 15 or 30 to 10 meters?
Nope again. Same offer.
Dan, AC6LA
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