Cecil Moore wrote:
I have an EXCEL spreadsheet that might help you
sort all of this out. A copy of its output is available at:

http://www.qsl.net/w5dxp/1secsgat.gif

The EXCEL spreadsheet corresponding to the above can be
downloaded from: http://www.qsl.net/w5dxp/1secTline.xls
It includes a graph of forward power, reflected power,
and joules stored in the transmission line.
--
73, Cecil http://www.qsl.net/w5dxp

Cecil Moore wrote:
Cecil Moore wrote:
I have an EXCEL spreadsheet that might help you
sort all of this out. A copy of its output is available at:

http://www.qsl.net/w5dxp/1secsgat.gif

The EXCEL spreadsheet corresponding to the above can be
downloaded from: http://www.qsl.net/w5dxp/1secTline.xls
It includes a graph of forward power, reflected power,
and joules stored in the transmission line.

I have enhanced that spreadsheet such that the resistive
load on the one second long lossless 50 ohm feedline is
a variable entered by the user. Please note the graph
of forward power, reflected power, and joules stored in
the feedline (chart1). The enhanced file is available at:

http://www.qsl.net/w5dxp/1secline.xls
--
73, Cecil http://www.qsl.net/w5dxp

Cecil,

Have you included the fact that the *source* is properly terminating
the line on its end?
The source can accept power from the reflected wave, right?

Dan

wrote:
Have you included the fact that the *source* is properly terminating
the line on its end?

The source is relying on an ideal autotuner to
terminate the line with a 50 ohm Z0-match.

The source can accept power from the reflected wave, right?

No, there is an ideal autotuner on the output of the
source. *Zero reflected energy reaches the source*. The
SWR between the Source and the Autotuner is 1:1 just
as it is in any properly tuned antenna system.
--
73, Cecil http://www.qsl.net/w5dxp

So how are you taking into account the stored energy in the ideal
autotuner? Even if it's perfect, there's energy stored in the fields
of the impedance transforming device. Are there 0J in the tuner? If
not, how does the impedance transformation take place?

Dan

Sorry should have been "If so, how does the impedance transformation
take place" not "If not"

Dan

wrote:
Are there 0J in the tuner? If
not, how does the impedance transformation take place?

Dan

wrote:
So how are you taking into account the stored energy in the ideal
autotuner?

The ideal autotuner is lossless. The delay through the
tuner compared to one second is negligible. The energy
in the tuner components is negligible compared to 300
joules.

The principles are just as easy to comprehend if the
tuner is replaced by a circulator and load.
--
73, Cecil http://www.qsl.net/w5dxp

Cecil Moore wrote:
wrote:
So how are you taking into account the stored energy in the ideal
autotuner?

The ideal autotuner is lossless. The delay through the
tuner compared to one second is negligible. The energy
in the tuner components is negligible compared to 300
joules.

Since the Z0-match is achieved at the ideal autotuner
input, just consider the lossless autotuner to be part
of the one second lossless transmission line system.
--
73, Cecil http://www.qsl.net/w5dxp