K7ITM wrote:
And I still say that your other postings
before that were saying you believed that there was NO capacitance to
the outside world. It was the message they sent to me, loud and clear.

I may have said that a pure lumped inductance has no capacitance
to the outside world and that is true by definition. Perhaps that
is what you are remembering. Anyone would be crazy to assert that
a real world coil has no capacitance to the outside world. What I
said is that capacitance to the outside world is often a secondary
effect compared to the primary effect of superposing forward and
reflected currents.

Given any volume, say a volume containing a Texas Bugcatcher coil and
the air inside and immediately around it, if you push more electrons in
than come out _for_ANY_abritrarily_short_time_period_, you have changed
the net charge in that volume; if you pull out more electrons than go
in, you have changed the net charge in that volume.

But that is not happening. Standing wave current doesn't flow. It just
stands there. How many times do I have to repeat the following.

Assume the forward current is one amp and the reflected current is one
amp. The standing wave current is the phasor sum of those two currents.

One amp of forward current is flowing into the coil and one amp of
forward current is flowing out of the coil. There is ZERO net storage
of charge associated with the forward current.

One amp of reflected current is flowing into the coil and one amp
of reflected current is flowing out of the coil. There is ZERO net
storage of charge associated with the reflected current.

Since these two currents are the only currents, there is ZERO net
storage of charge in the coil. The magnitude of the standing wave
current is irrelevant.

The forward current at the bottom of the coil is one amp at zero deg.
The reflected current at the bottom of the coil is one amp at 180 deg.
Their phasor sum, the standing wave current, is zero.

The forward current at the top of the coil is 0.5 amp at -90 deg.
The reflected current at the top of the coil is 0.5 amp at -90 deg.
Their phasor sum, the standing wave current, is 1.0 amp at -90 deg.

There's no net storage of charge in the coil, zero amps at the
bottom of the coil, and one amp at the top. That proves that standing
wave current doesn't flow, exactly as its equation says it doesn't
flow, exactly as Hecht, in "Optics", says a standing wave "doesn't
move through space".

The rest of your posting is irrelevant since it just repeats
the same old misconception that standing wave current flows.
--
73, Cecil http://www.qsl.net/w5dxp