On Dec 11, 10:29 am, Cecil Moore wrote:
I've been reviewing my 1950s college textbooks to
see where my concepts came from. Here's a couple
of example quotes:

"Transmission Lines and Networks", Walter C. Johnson,
(c) 1950.

"... when the load reflects part of the incident energy,
it is found that the rms voltage and current vary almost
periodically along the line. This *effect* is *caused*
by the *interference* between the incident and reflected
waves, and the *resultant* variation is called a standing
wave."

The idea that interference *causes* effects (such as
standing waves) was not originated by me.

"Fields and Waves in Modern Radio", Ramo and Whinnery,
(c) 1944, 1953

"... energy cannot pass the perfect conductor ... Hence
all *energy brought* by the incident wave must be returned
in a reflected wave."

The idea that waves *bring* energy and that there is actual
energy in a reflected wave was not originated by me.

These concepts were probably around before I was born.
--
73, Cecil http://www.w5dxp.com

Did Johnson really say "almost periodically"?
Pretty close to periodic, but not quite? Hmmmm!

I suppose it just shows that even the best write
with a bit of laxness now and then.

Short quotations without the context are so unfair.

....Keith