"Cecil Moore" wrote in message
...
wrote:
Would you please describe for me the physical arrangement of an IDEAL
inductance.
Art, picture a dimensionless point in your mind. Define that point as
an inductance without dimensions, without capacitance, and without
resistance.
I'll stop right there, Dimensionless objects which relies on proximity
effects
is beyond my ken. To use this as an aproach of dimensional devices with
NEC to prove something is like building on sand This is like using complex
circuitry
and ignoring connection lines that radiate. In mathematics we use a mythical
addition
of root minus one as a sort of gimmic to solve a problem but we always
remove the gimic
before the real world answers are given, yet you want to keep the gimmic,
ala an imaginary
thing which is dimensionless and thus has zero proximity effects even tho
proximitry effects
is what generates inductance in a dimensionless form. And you want me to use
this imaginary
dimensionless aproach with NEC which deals with the real world where
inductance cannot
be dimensionless ? This is where the coil argument started since the field
density inside a coil
is more than that at any point physically and dimensionaly outside the coil
which leads to lumped load errors.
I am hoping that Ian will address the question in a more serious way and not
as a way to
buttress a personal agenda. I suppose I should have made it a seperate
posting so it would
not be perceived in taking sides e.t.c. Actually I modelled the coil to
real world dimensions
with a NEC program with copious segments that supplied current levels at
multiple points
around each turn to get my answers which this thread now suggests that NEC
answers could me incorrect
thus I am following the thread but not partaking in it.
My personal belief is that making EZNEC a part of the debate is a mistake
since it contains
boundaries that most NEC computor do not have and the coil problem is
outside its useable
boundaries or imposed limits.If a lumped load is viewed as dimensionless
then a computor
can be excused as supplying a dimensionless response which can evoke a
'garbage in....'
type comment.
Like most technical things there is nothing wrong with the use of items
such as EZNEC
within the limits prescribed by Roy and the coil question is outside the
useable limits
of the EZNEC program.
This response is not meant to be personal to anybody or any program
mentioned
Art
There is your "IDEAL inductance" and exists ONLY in the human mind and
certain
computer models. Since it is dimensionless, the current into the point and
the
current out of the point are the same current because they are the same
point
and, of course, the dimensionless point is traversed instantaneously.
Now, without modification, extend that dimensionless concept to a one-foot
diameter, one-foot long bugcatcher coil, wound with 60 feet of real-world
wire.
Assert that the bugcatcher coil has virtually identical characteristics to
that
previous dimensionless point in your mind. Use a computer model's
dimensionless
inductor feature to prove your point.
That's the present "physical arrangement". :-)
--
73, Cecil http://www.qsl.net/w5dxp
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