Equilibrium and Ham examinations
 

On Sep 18, 2:14*pm, John Smith wrote:
Jeff Liebermann wrote:

And what do you do when they don't work? *Cut-n-try is a rather
expensive way to build something that works. *Given infinite time and
materials, it will eventually result in a functional antenna. *You
could probably do that at HF frequencies where construction errors are
about equal to calculation errors. *However, don't try it at microwave
frequencies. *While it's possible to cut-n-try various microwave
structures, it's messy, difficult, prone to error, and not very
effective. *The techniques used to build a coat hanger ground plane at
VHF just are not going to work at X-band.

Well, ya', an adjustable whip(s) is good, especially with the cost of
copper and the pain in "resoldering your prunings." *LOL

The only way to get it close to right the first time is to calculate
first, calculate again, have someone check the calculations, drink
some wine, and check your calcs again. *Then build it.

You have wine? *Why didn't you say so, that changes everything:

1) Put antennas away.

2) Have a glass of wine and contemplate the design/construction.

3) Repeat 2) until ALL wine is gone.

4) Take a nap.

5) Now get the antenna(s) back out and begin work ... LOL



A few times, I have just grabbed up some tubing/wire a variable
condenser or two, and "eyeballed" the construction--past experience
provided "ballpark" figures/placements/wiring, testing, trimming and
adjusting got me the final result ...

Yep. *That will work at HF because the lower frequencies allow for
much larger construction errors. *Your antenna lengths could be off
many cm and still work. *Your xmitter can also tolerate a substantial
VSWR and still be considered functional and useful. *You match box
could be grossly inefficient trying to match your constructed antenna,
and work well enough. *Now, try that at microwave frequencies, where
every milliwatt is precious, where VSWR is too crude and reflection
coefficient comes close to describing the ultimate goal of a perfect
match, and where cm errors are disastrous. *Some broadband antennas
(helix and horn) are very forgiving and can be build fairly crudely.
Others (stripline, phased arrays, cavity backed antennas, etc) have a
higher Q and require more accuracy than the eyeball can provide.

Or, to summarize, the more complex the antenna, the more meters you are
going to need ... LOL

Mainly, I point this out so as not to "obsfucate" that layman, or
discourage him ... the men who first started/awakened my interest in
such things never gave any indication, to me, they had an understanding
of calculus, only basic-math/algebra, and of course, geometry!

Same here. *My original mentors were operators first and technical
types last. *However, I saw the light (and the distinction) between
amateur and professional when I went to college and saw that radio
things were easier and better if they were calculated (and understood)
first. *I have several humorous examples of hams operating in a
professional environment (engineering lab at a radio manufactory) and
failing miserably using cut-n-try methods popularized by ham radio.

Indeed, mine drank beer too! *grin

Indeed, at least one passed away without ever expressing any real
interest in learning it!

There are suspicions that math may hasten one's demise. *Perhaps he
tried to do a calculation before he died?

If away from my laptop, the programmable calculator is always in my
pocket! (I mean, my gawd man, I have space invaders on it!) *straight-face

* ...

Also, I assembled a small list of tech patents that appear to be
bogus. *I was going to post the list on the web but my attorney
advised against it. *Even holders of bogus patents can sue for
damages. *Oh well.

... some patents are NOT what they used to be ... but then, there has
always been some suspicion about the politics involved, not to mention
courts ...

Regards,
JS

JS
Mathematics is founded on the proposition of zero means nothing ONLY
if you ignore the presence of the weak force.
Thus mathematic has contaminated that which is the "equal" sign which
then is misused without the assumption of the underlying condition
You can cancell the effects of gravity but it is a lot different to
canceling the weak force.
Put scales on a bench to oppose gravity does nothing to neutralise the
weak force
Thus in mathematics you can obtain negative answers which is the
measure of the weak force which is contradictory
to the "term" nothing in celestial terms but possibly is O.K. in
polotics
The CERN project is based on the collision of particles of the same
polarity but without the constraints of sideways movement
but the electron is much smaller than the area taken by an electron so
to my mind there is no collision only contra or lamina
flow UNLESs the particles are of different polarities which some
theorise as equating to the big bang.!
Art
Have fun
Art

Equilibrium and Ham examinations
 

Jeff Liebermann wrote:
[stuff]

Forgot to mention, on those "real complex antennas", you are going to
need more wine too! ;-)

Just one more of those laws that Murphy forgot to mention.

Regards,
JS

Equilibrium and Ham examinations
 

On Sep 18, 2:25*pm, Jim Kelley wrote:
Art Unwin wrote:
For instance, equilibrium demands that charges do not move laterally
along an antenna when in equilibrium
Without equilibrium charges do move along the surface of a radiator
and Newtons law of parity demands
that charges are moving thru the *CENTER of the radiator thus
encoundering just copper losses.

Hi Art,

Which one was Newton's Law of Parity again? *I'm drawing a blank.

Google had this:

Your search - "Newton's law of parity" - did not match any documents.

73, ac6xg

I have been accused often in the using of the wrong term
In the case of Newtons law as action creates reaction or similar.
Then somebody mentioned the law of parity which I considered as being
on par with what Newton said
Now another poster mentioned that parity described a farming practice
which also featured the pursuit of balance and parity
with respect to prices. Thus when the term parity was used I thought
that was a regrinding of the english language which I am now exposed
to.
I now remove the association of parity in the Laws as stated by Newton
who lived in the UK and not in the USA.
Best regards
Art Unwin KB9MZ.......xg

Equilibrium and Ham examinations
 

On Sep 18, 2:47*pm, John Smith wrote:
Jeff Liebermann wrote:

[stuff]

Forgot to mention, on those "real complex antennas", you are going to
need more wine too! *;-)

Just one more of those laws that Murphy forgot to mention.

Regards,
JS

JS You know the saying that when one door closes another opens.
In my case starvation of oxogen to the brain was momentary such that
only the lines of communication
withered. Thus nothing was left to provide communication between the
different store houses of knowledge.
Due to experience the lines of communication of most people reflect
the motorways of New youk where the accumulation of intersections
allow misdirection of communication or the memory of where one was
originally going! Over a period of years where I concentrated on
antennas
as a method of rehab those missing communication lines were re
generated in reflection of my new experience as one would measure the
power of the growth of a babies brain. Thus my concentration on a
niche form of study is not impaired by the traffic jams of the past
which are now just decaying wreckage. Maybe the same is happening with
Hawkings. Ofcouse that leaves an opening for Dave that the decay
extended to the store houses of knowledge! My goodness isn't this
thread getting deep?
Best regards
Art

Equilibrium and Ham examinations
 

Art Unwin wrote:

...
JS You know the saying that when one door closes another opens.
In my case starvation of oxogen to the brain was momentary such that
only the lines of communication
withered. Thus nothing was left to provide communication between the
different store houses of knowledge.
Due to experience the lines of communication of most people reflect
the motorways of New youk where the accumulation of intersections
allow misdirection of communication or the memory of where one was
originally going! Over a period of years where I concentrated on
antennas
as a method of rehab those missing communication lines were re
generated in reflection of my new experience as one would measure the
power of the growth of a babies brain. Thus my concentration on a
niche form of study is not impaired by the traffic jams of the past
which are now just decaying wreckage. Maybe the same is happening with
Hawkings. Ofcouse that leaves an opening for Dave that the decay
extended to the store houses of knowledge! My goodness isn't this
thread getting deep?
Best regards
Art

Yes Art, it is getting deep ...
sound-of-hip-waders-being-pulled-on ;-)

Regards,
JS

Equilibrium and Ham examinations
 

On Thu, 18 Sep 2008 12:55:59 -0700 (PDT), Art Unwin
wrote:

I now remove the association of parity in the Laws as stated by Newton
who lived in the UK and not in the USA.

Yep. Newton's Laws of Motion are different on this side of the pond.

1. A particle will stay at rest or continue at a constant velocity
unless acted upon by revisionist politics, traffic laws, zoning
restrictions, local ordinances, or erroneous navigation information.

2. The net force on anything is equal to size of the politically
motivated masses multiplied by the sum total their campaign
contributions.

3. Every action has an equally reactionary opposition.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Equilibrium and Ham examinations
 

On Sep 18, 12:58*pm, Jeff Liebermann wrote:
On Thu, 18 Sep 2008 16:26:18 GMT, "JB" wrote:
We know that the AC current in the antenna induces an
electromagnetic wave is sufficient for my purpose. *Unless I can find
funding for renewed efforts... *(wink nudge)

Funding is easy these days. *All you need is an anti-terrorism or
disaster link. *For example:
- Use of HF antennas for airport security.
- Antenna design optimized for disaster services.
- Survivable antenna design and construction.
While these topics are contrived, there has been considerable
rethinking of the basics in order to enhance survivability, tampering,
security, terrorist activities, general mayhem, and other post-911
buzzwords. *I'm not sure this extends to basic concepts, but it's
possible. *Something like:
- Re-evaluating E-M concepts in a post 911 world.
- Survey of antenna technology for optimum disaster communications.

You will need to use your imagination because all the obvious studies
have already been taken. *Perhaps combining everything into:
- The effects of global warming, terrorism, economic collapse, and
* natural disasters on antenna technology.
Try to emphasize the positive aspects such as the improved HF antenna
grounding provided by rising sea levels.

--
Jeff Liebermann * *
150 Felker St #D * *http://www.LearnByDestroying.com
Santa Cruz CA 95060http://802.11junk.com
Skype: JeffLiebermann * * AE6KS * *831-336-2558

Jeff if you have everything placed before you your enthuseasm will
wain.
There is nothing wrong in exactly following in MY footsteps you have
your own
bag of choices by not being a follower which enables you to challenge
each step of logic.
Fortunately in my case it was the foundation on which I built that was
the subject of
challengr despite evidence opresented to the contrary The foundation
upon which everything rest
is that the supposition of making Gaussian law of statics equal to the
dynamic field of Maxwell only requires the addition of a radiator
and a time varying field such that both are equal in physical and
mathematical form, from which point the details offered provide all
the relavent points of logic.
This group mainly of electrical engineers have been brought up on the
idea that statics are totally divorced from the mechanics of the
electrical curriculum
to the rejection of particle mechanics and towards the idea that
sciences all have diifferent laws to each other. Scientists understand
this but authors
have not got to the stage of placing those findings in books which are
initially provided by followers of science in the hope that some will
carry the flag forward instead of concentration on the accumulation of
wealth. If they can't read it in a book then it is not believable the
same way as a scientific paper will not be accepted that do not
prevail on previous thoughts. Initial thought is thus rejected by the
education of today. Academia will never accept anything
that is not received approval from their peers.
Thus without dragging them forcibly into the acception of change no
change will occur., where as, your expertise in mathematics can test
the logic to its limits which defy opposition
Best regards
Art Unwin KB9MZ.........xg

Equilibrium and Ham examinations
 

On Thu, 18 Sep 2008 18:09:57 GMT, "JB" wrote:

Yep. Also the bottom of the 1296MHz band went to GPS because hams
couldn't do anything useful with it. Also most of the 220MHz band
went to ACSSB and inland waterways because it was under-utilized and
because the ARRL couldn't get it together on no-code licensing. We
almost lost the 2.4GHz band because the ARRL was going to demand
priority over unlicensed wi-fi operation, but that was averted when
the ARRL directors received a rare dose of common sense from unknown
sources.

Yer crocked! 1296 is fully utilized here and so was 220. People like YOU
who underutilized it and TOLD everyone it was underutilized are to blame for
US losing it!! Did you get a Ham license just so you could use 802.11/g on
channel 13?

Been licensed since about 1964. There was about a 7 year period where
I let my license lapse. Hmmm... I should probably let it lapse again
as I was profitable, happy, and optimistic during those 7 years.

About 8 ago, I setup several scanners and a computah to run long term
statistics on channel utiliziation for a variety of services. For
fun, I threw in some local VHF and UHF repeaters. For 14 daytime
hours (I used 6am to 8pm) median utilization on public safety
frequencies ran about 20%. Somewhat less for various shared
commerical repeaters. However, of the 5 or so ham repeaters I
monitored, utilization was well below 1% (less than 1.5hrs per day). I
didn't bother to do any 1.2GHz repeaters, but I'll guess from one that
I have in my scanner, it's probably even lower. I had no way to count
users per channel per day, but if I did it manually, I suspect ham
radio would also be scraping bottom. Many ham repeaters have only one
user.

For what it's worth, I consider myself party responsible for educating
at least one ARRL director on the realities of the FCC balancing the
300 million wi-fi users against perhaps a handfull of hams on 2.4GHz.

I don't use Channel 13 for Wi-Fi. It's an unlucky number (and not
legal in the US).

Personally, I've suggested that CB'ers and Free Banders be issued
complimentary ham licenses for 10 meters and let them fight it out.
I'll be betting that the CB'ers win. Most of the "new hams" these
days are former CB'ers. With a few notable exceptions, most are quite
nice, but also technically lacking.

Bendict Arnold! Anarchist!! Anti-Ham!! Your web domain says it all!!

Guilty as charged. If I can't be a part of the solution, I'll become
part of the problem.

Incidentally, the LearnByDestroying.com has nothing to do with ham
radio. A college I attended has the motto "Learn by Doing".
http://en.wikipedia.org/wiki/California_Polytechnic_State_University
That morphed into "Learn By Destroying" which seemed to be the
practice in the engineering department. Since graduating with a
rather substantial damage fee, I have adopted it as my personal motto.
If you haven't destroyed and later repaired it, you don't understand
how it works.


--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Equilibrium and Ham examinations
 

On Thu, 18 Sep 2008 12:14:31 -0700, John Smith
wrote:

Well, ya', an adjustable whip(s) is good, especially with the cost of
copper and the pain in "resoldering your prunings." LOL

Incidentally, one of the tricks I learned (the hard way) was to
replace the mobile whip antenna with a piece of copper electrical
wire. Then cut it to length, tune, optimize, test and whatever. Once
the optimum length is established, replace the copper wire antenna
with the real stainless whip, cut to the exact same length.

You have wine? Why didn't you say so, that changes everything:

The antenna transfer function of wine is highly exponential and very
non-linear. A little wine will produce a superior antenna. However,
incremental increases in wine dosage will tend to have lesser effects.
At some threshold, additional can cause a substantial drop in
performance. It may even go negative. Think equilibrium.

Or, to summarize, the more complex the antenna, the more meters you are
going to need ... LOL

Kinda reminds me of a former tech. All day, he would spend his time
working with the latest state of the art test equipment in the lab.
After hours, he would drag out his ham radio, and tune the xmitter to
maximum using a light bulb dummy load. Attempts to convince him that
the company test equipment might be useful for dealing with his radios
were futile.

If away from my laptop, the programmable calculator is always in my
pocket! (I mean, my gawd man, I have space invaders on it!) straight-face

That doesn't leave much room for the pocket protector. I collect HP
calculators. There are numerous calculators scattered around the
office and house. No need to drag a calculator around.

... some patents are NOT what they used to be ... but then, there has
always been some suspicion about the politics involved, not to mention
courts ...

There's plenty wrong with patents that I don't wanna get into. Suffice
to say that it's very helpful to understand something about patents
before trying to create one. I'm just suggesting that you make the
effort to read patents.

Groan. I decide to stay home today to recover from my home cooking.
Outside, PG&E (the power company) and the local tree service just
arrived. There goes my power...





--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Equilibrium and Ham examinations
 

"joe" wrote in message ...
Many antennas are built using tubing for light weight. So, if there is a
current flowing in the middle, it is good that the ends of the tubes are
crimped, or plugged. I wouldn't want the flowing electrons spilling out
onto my lawn.

thats why they put those plastic plugs on elements, to keep the magical
mystery dielectric particles from falling off instead of going back up the
middle... if you ever lose the plastic caps you will notice the antenna
starts leaking and the particles pileup in your yard making a real mess.