Understanding Yagi antenna
On Fri, 14 Sep 2007 16:17:42 -0500, "amdx" wrote:
I think this
moon cut effectively make the gap look larger.
Hi Mike,
It is simply a function of the mechanical connection of the line at
that point (the inner conductor needs the cut-out and the shield has a
closer point of attachment).
So now what can the group tell me about;
Driven element impedance
50 Ohms.
the gap
the distance between the closest points of contact before the line was
installed - i.e. the thickness of the inner conductor's insulation
(true for absolutely every antenna built).
coax length impedance transformation
Not sure that matters if in fact it has been designed to be a Z
transformer. If so, then you have one of several dimensions possible
n/4 wavelength or n/2 wavelength where n is odd.
the 4 toroids
Decoupling.
73's
Richard Clark, KB7QHC
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