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Old April 12th 06, 10:22 PM posted to rec.radio.amateur.antenna
Cecil Moore
 
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Default Current across the antenna loading coil - from scratch

John Popelish wrote:

Cecil Moore wrote:
What does it mean to the E-fields and H-fields to say
the voltage is leading the current?


It means that the current at both ends of the coil was delayed (relative
to its phase if the coil had not been there). It means that there was a
voltage difference across the ends of the coil that drove that current
through the coil.


In order to avoid any delay through the coil, you propose a delay
in the one inch of wire at the bottom of the coil? Does that really
make sense to you? How is this magic delay accomplished?
--
73, Cecil http://www.qsl.net/w5dxp
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Old April 12th 06, 11:05 PM posted to rec.radio.amateur.antenna
John Popelish
 
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Default Current across the antenna loading coil - from scratch

Cecil Moore wrote:
John Popelish wrote:

Cecil Moore wrote:

What does it mean to the E-fields and H-fields to say
the voltage is leading the current?



It means that the current at both ends of the coil was delayed
(relative to its phase if the coil had not been there). It means that
there was a voltage difference across the ends of the coil that drove
that current through the coil.



In order to avoid any delay through the coil, you propose a delay
in the one inch of wire at the bottom of the coil? Does that really
make sense to you? How is this magic delay accomplished?


Exactly the way it is accomplished if you apply AC to an LC "L" low
pass filter that droves a resistor load. The short antenna acts as
the capacitor (in parallel with losses and radiation) in the circuit.
It is resonated with the series inductor so both the inductance and
capacitance cancel, so the source drives only the losses and
radiation. Power factor corrected.

If you don't believe me, simulate it with EZNEC. Connect a source to
a parallel combination of C and R. Record the phase of the current
with respect to the voltage (the current will lead). Then add a
series inductance that cancels the capacitance, and the current will
be delayed till it matches the phase of the applied voltage. Power
factor corrected.
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Old April 13th 06, 01:53 AM posted to rec.radio.amateur.antenna
Cecil Moore
 
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Default Current across the antenna loading coil - from scratch

John Popelish wrote:
If you don't believe me, simulate it with EZNEC. Connect a source to a
parallel combination of C and R. Record the phase of the current with
respect to the voltage (the current will lead). Then add a series
inductance that cancels the capacitance, and the current will be delayed
till it matches the phase of the applied voltage. Power factor corrected.


The "current will be delayed"? That cannot be, according to
W8JI and W7EL. They say there is no more delay through a 6"
coil than through a 6" wire. That's what the argument is all
about. Instead of the current being delayed, their voltage
jumps ahead in time at greater than the speed of light in
order to correct that power factor.
--
73, Cecil http://www.qsl.net/w5dxp
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Old April 13th 06, 02:22 AM posted to rec.radio.amateur.antenna
John Popelish
 
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Default Current across the antenna loading coil - from scratch

Cecil Moore wrote:
John Popelish wrote:

If you don't believe me, simulate it with EZNEC. Connect a source to
a parallel combination of C and R. Record the phase of the current
with respect to the voltage (the current will lead). Then add a
series inductance that cancels the capacitance, and the current will
be delayed till it matches the phase of the applied voltage. Power
factor corrected.



The "current will be delayed"?


Compared to the phase of the current without the inductor being in
series."

That cannot be, according to
W8JI and W7EL. They say there is no more delay through a 6"
coil than through a 6" wire.


You are talking about delay from one end of the coil to the other. I
am talking about delay, compared to the same circuit without the
inductor in place. See the difference?

That's what the argument is all about.


Not from where I am watching.

Instead of the current being delayed, their voltage
jumps ahead in time at greater than the speed of light in
order to correct that power factor.


Good one. Pull the other.
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