Vee wrote:

Danny,

Thanks for sharing this link. I found the article very well written
and some very good information on SWR and suggestions on antenna
design. Looks like the author is SK, so probably no way to follow up
with questions, as suggested in the article. I'm curious as to when
the article was written. I am just getting back on the air after
several years of inactivity. I am trying to decide what type of
antenna to put up in a 1/3 acre city lot without any tall trees. I'm
thinking about an off-center fed dipole. Looks like an 80 meter
dipole fed with ladder line and using a good antenna tuner would work
on all bands. I don't have room for a full half-wave 80 meter dipole,
but could do a bent off-center fed dipole. The Carolina Windom is
probably what I'm thinking about, but hate to pay their price for
something that could probably be home built. Also considering an all-
band vertical, mounted on the roof of my home.

Thanks again
Vee W7IBB – Utah


This paper takes the view that the final stage(s) in a PA is/are very
much like a power generating plant. And, in a very simple comparison,
it/they is/a

http://www.degendesigns.com/Downloads/TheEasyWay.PDF

However, that power generating station has carbon piles to sink the
power into and maintain a correct draw for the power the plant is
producing--until generators can be slowed or dropped off line to match
"the impedance" of the load being presented to it. The power plant has
switches and breakers to cut part of its' load to maintain a "correct
match" (or, correct impedance) being presented to its' load, etc.

In our PA's, we do not have such niceties ... the antenna must present
and hold a proper "draw" upon this power being generated in our
tubes/transistors/tank-circuits. If not, either too much current is
drawn, voltage dips, the design parameters of devices and components are
exceed and "something gives." If the load draws too little power,
voltage(s) spike, current drops, and the voltage rating of the
devices/components are exceeded and "something gives."

While the paper, in a round-about-way, does present this in an
convoluted view, it expounds on this/these events to build a case for
obsfucating SWR, forward power, etc.

But then, in old arrl literature, such inconsistencies abound ...
indeed, they can still be found in current material from this source
(arrl) ...

Regards,
JS