Hello antenna cracks,
I need your advice in the following project:
years ago I read some article about building a reduced size 2 ele Quad for
40m.
I think it was originally designed by a G3 amateur. Sorry I cannot remember
the call and I do not find the article anymore.
This is the scheme:
The size of the antenna loop is reduced to about 75 percent (each side about
26ft/8m long).
Capacitive linear loading is used to resonate the loop:
Loading wires are connected to the center point of the vertical wires and are
run parallel to the vertical wires at a small distance (2 ft/60cm or so?).
These loading wires are strung between the normal quad spreaders as well and
are nearly as long as the vertical wires themselves.
My questions are:
Does anyone have the correct dimensions for this antenna?
(DRIVEN ELEMENT:
loop length, loading wire length, spacing distance of loading wire to
element)
(REFLECTOR:
loop length, loading wire length, spacing distance of loading wire to
element)
or any FORMULAS I can start with? I could start with the approximate
dimensions I still have in my head, but I think it will take quite a long
time then.
Reflector resonate frequency should be about 3 percent lower - RIGHT?
I think a gamma match will do nice for feeding - RIGHT?
Any other comments?
Anything will be appreciated. Please mail directly to CP2235@aol.com
I will collect the answers and provide a sum-up for anybody interested in
this topic.
Thank you very much. With a bit of luck we will meet with this antenna in
both WWDXs this year.
73,
Con, DF4SA
Cornelius Paul DF4SA CP2235@aol.com
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