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Old March 10th 06, 12:35 PM posted to rec.radio.amateur.antenna
 
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Default Current through coils

Cecil Moore wrote:

In case you missed it, here's what Walter Maxwell had to say
about the subject:

"If an inductance is in series with a line that has
reflections, the current will NOT be the same at both
ends of the inductor."

"Consequently, circuit analysis will not work when both
forward and reflected currents are present in a lumped
circuit."


Cecil, I really think you should let Walt speak for himself. You have
a history of distorting facts and taking statements out of context, and
may be discrediting Walt. Walt is too nice a person for me to stand by
and let that happen.

If anyone really thinks that as a stand-alone statement, it is not
correct. I suspect he didn't get the full story or wasn't following a
discussion closely, or you have snipped something out of context. It's
very easy to take small areas out of context and make it seem like
someone is saying something they are not.

Any circuit analysis will work so long as the load impedances used in
the analysis are the same as the load impedances presented at that
point by an antenna.

The behavior of any small two-terminal component REQUIRES currents to
be essentially equal. It's only when the component has a third
significant path to the outside world that currents can be unequal.

If I have a small capacitor, current flowing in one lead is equal to
current flowing out the other and the phase of each current is exactly
equal. Same for an inductor.

That's not a guess, that's a rule of how things always behave.

I'm wondering if the real problem is some people spend too much time
with transmission lines and antenna and not enough time with circuit
components, and become rusty?

In any event, you do enough damage to people's reputations Cecil.
Please leave Walt alone. He will speak for himself if he likes.

73 Tom

 
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