wrote:
... assume 100 Ohms for the lamp cord:

Rash assumption. Please prove that six feet of zip cord
exhibits a Z0 of 100 ohms to 60Hz signals.

Of course, we were discussing sinusoidal steady state for which
there will be no echoes. Echoes only happen when the line energy
state is changing.

In reality, there is no such thing as sinusoidal steady-state
and noise in the system cannot be eliminated. The noise can
be used to prove that echoes (reflections) are still happening.
So nothing magic happens at sinusoidal steady-state. The wave
reflection model does NOT magically become dysfunctional at
steady-state.

But the math from the theory works just fine
in all these situations. Try it.

I know the math works *IF* you can define the boundary conditions.
Assuming that 50 ohm coax exhibits a Z0 of 50 ohms at 60 Hz is
a rash assumption.
--
73, Cecil http://www.qsl.net/w5dxp



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----