Ian White, G3SEK wrote:
Think what would have happened if you had measured the impedance at the
TX end of your o/c transmission line (very high or very low, depending
on the length) and replaced it with a resistor and inductor/capacitor
giving the same value of R +/- jX.

There's no transmission line, so no traveling waves of anything, and no
reflections - just a transmitter with a very wrong value of load
impedance. The 1625s would have burned up just the same.

Yes, 1625's are pretty dumb but hopefully, we are smarter than the 1625's.
Here's more from the IEEE dictionary.

"resistance - (A) That physical property of an element, DEVICE, ...
(B) The real part of impedance. Note: Definitions (A) and (B) are
not equivalent ..."

"resistor - A DEVICE the primary purpose of which is to introduce
resistance into an electric circuit."

"impedance - (B) The ratio of the ... voltage ... to the ...
current ... (C) A physical DEVICE or combination of DEVICES ...
Definition (C) is a second use of 'impedance' and is independent
of definitions (A) and (B)."

"impedor - A DEVICE, the purpose of which is to introduce impedance
into an electric circuit."

In your above example, you changed the circuit from a (B) impedance to
an impedor. Even if the 1625's can't tell the difference, W5DXP can. :-)
Note that I, not the IEEE, capitalized 'DEVICE' in the above definitions.
--
73, Cecil http://www.qsl.net/w5dxp



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