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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Hey, that's cool. Been a ham for 46 years, made it through Air Force
technical school, got a BSEE degree, and spent over 30 years doing
circuit design without ever once coming across the term "impedor". And
there it was, right in the IEEE dictionary. This newsgroup is sure
educational!

Roy Lewallen, W7EL

W5DXP wrote:
. . .

"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.

Roy Lewallen wrote:
Hey, that's cool. Been a ham for 46 years, made it through Air Force
technical school, got a BSEE degree, and spent over 30 years doing
circuit design without ever once coming across the term "impedor". And
there it was, right in the IEEE dictionary. This newsgroup is sure
educational!

So what are you going to do with your new found knowledge? :-)
--
73, Cecil http://www.qsl.net/w5dxp



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Roy Lewallen wrote:

Hey, that's cool. Been a ham for 46 years, made it through Air Force
technical school, got a BSEE degree, and spent over 30 years doing
circuit design without ever once coming across the term "impedor". And
there it was, right in the IEEE dictionary. This newsgroup is sure
educational!

Maybe you missed this one also: "reactor - a device, the primary purpose
of which is to introduce reactance into a circuit."

If you buy 'resistor', why not 'reactor' and 'impedor'? Same concept.
--
73, Cecil http://www.qsl.net/w5dxp



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W5DXP wrote:
Even if the 1625's can't tell the difference, W5DXP can. :-)

That's the whole point - the *only* difference is a conceptual one that
exists inside your mind.

It has no reality out here in the physical world of measuring
instruments and engineering, which is the place where the 1625s live
(and sometimes die).


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek

Ian White, G3SEK wrote:

W5DXP wrote:
Even if the 1625's can't tell the difference, W5DXP can. :-)

That's the whole point - the *only* difference is a conceptual one that
exists inside your mind.

BS, Ian. My pet cockroach can tell the difference between a V/I
ratio resistance and a resistor. Why can't you?
--
73, Cecil http://www.qsl.net/w5dxp



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