On Apr 18, 9:52 am, Cecil Moore wrote:
Keith Dysart wrote:
You give yourself the perfect out, don't you. You won't study
the simple circuits that can be understand (for which, by the
way a circulator is not required, thus indicating that you do not
yet understand them) because they are not complicated
enough to represent an average amateur radio transmitter, and
you can't study an average amateur radio transmitter because it
is too complicated to be understood.

I'm willing to study them if you will only send me a
schematic. But I'm not going to waste a lot of time
on something that is of very limited usefulness. We
already have a model that will eliminate reflections,
i.e. a signal generator equipped with a circulator,
but we don't use such for amateur radio transmitters.
Why invent something else that we don't use for amateur
radio transmitters? Why not choose an actual amateur
radio transmitter to try to understand what happens
with amateur radio transmitters? That seems like a
no-brainer to me.

Why? You say. Because if one does not understand
how the simple circuits behave, there is no hope for
understanding how something as complex as an
amateur radio transmitter behaves.

Amateur transmitters do not have circulators. If you
don't have the tools to figure out what happens when
a wave is incident on the simplest of generators (an
ideal voltage source in series with a resistor), there
is no way you can figure it out for a more complicated
transmitter.

Start simple, then extend.

To learn what happens with the simplest of generators,
look in any textbook on the subject or google '"lattice
diagram" reflection'. The LTspice simulation I previously
offerred can be used to confirm the results of analysis.

....Keith

PS - The schematic for the generator is as described above.
They are connected to each end of a transmission line as
described in a previous post. Compute how much of the
incident wave is reflected at each end. Choose any
frequency, line length, voltage and waveshape you find
convenient for the generators.