On 10/31/2013 11:51 PM, Rick - DJ0IP / NJ0IP wrote:
Please help me out here
I've done my best, both in the RFI tutorial and in the Power Point on
coaxial chokes that are on my website.
Throughout, you insist on using the word "balun" with some qualifying
adjective. Why use the word "balun" at all? It is clearly inadequate to
describe the device in question, and is a major obstacle to understanding.
If what we want is a common mode choke, we should CALL it a common mode
choke. Then we realize that we must understand what it does in the
common mode circuit to understand how it works and what its limitations
are. When we call it a current balun, we don't know what it is or how it
acts -- 99.9% of hams view it as a mysterious black box.
If what we want is a half wave of transmission line to go from the
feedpoint of one side of a dipole driven element to the other, we
should call it a half wave of transmission line, because that's what it
is. And when we CALL it what it really is, we understand how it works,
and we understand that it only works at the frequency where it is a half
wave.
73, Jim K9YC
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