On Mon, 29 Nov 2004 12:23:53 -0500, Ken wrote:
Does it matter?
Hi Ken,
The technique matters at the peripheries of what you seek to
accomplish. The tight conjunction of wires (the are properly
transmission line) reduces their characteristic Z. This is a positive
attribute if you seek that characteristic. Recall that the best line
Z is found through the math of finding the root of the product of the
two Zs being transformed (in other words, does that tight conjunction
lend itself to this root of the product).
However, there are many topologies in winding these items, and not all
conform to this technique. For some, you want separation so that the
loss and isolation characteristics are maximized at the margins of
frequency operation (typically high end use).
So, yes it matters. The real question is: Does it matter for you?
73's
Richard Clark, KB7QHC
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