RadioBanter

RadioBanter (https://www.radiobanter.com/)
-   Antenna (https://www.radiobanter.com/antenna/)
-   -   Vertical problem (https://www.radiobanter.com/antenna/135306-vertical-problem.html)

John Smith August 4th 08 03:54 PM

Vertical problem
 
John Smith wrote:
Roy Lewallen wrote:
Basic physics is fine, but it's possible to reach all sorts of invalid
conclusions if misapplied.

Roy Lewallen, W7EL


I have been thinking about this "comment."

And, absolutely!; Things only get more interesting when we can "bend"
the laws ... ;-)

Regards,
JS


Again, gettin' old ...

Fortunate to have Roy, Cecil and others here ... I, certainly, would get
bored without them ... someone I can have a "difference" with ... but
then agree with.

Life is not just good, it is EXCELLENT ... ! and, when they are right,
they are RIGHT!

Regards,
JS

Cecil Moore[_2_] August 4th 08 06:33 PM

Vertical problem
 
John Smith wrote:
Things only get more interesting when we can "bend"
the laws ... ;-)


"Whattaya mean 'we', White Man?" Every miracle performed
in "The Bible" can be performed by man today probably
including keeping a man technically dead for three
days and then reviving him (any volunteers?).

I suspect every technical "law" known to man will be broken
in the next 1000 years, if not in the next 100 years. We
have already eaten of the Tree of Knowledge. It will only
be a matter of time until we eat of the Tree of (Eternal)
Life, relatively speaking.
--
73, Cecil http://www.w5dxp.com

Michael Coslo August 4th 08 07:06 PM

Vertical problem
 
Cecil Moore wrote:
John Smith wrote:
Things only get more interesting when we can "bend" the laws ... ;-)


"Whattaya mean 'we', White Man?" Every miracle performed
in "The Bible" can be performed by man today probably
including keeping a man technically dead for three
days and then reviving him (any volunteers?).



Well, I don't think we can cover the entire earth with water past the
height of the tallest mountains. Like that ever happened tho'.

I suspect every technical "law" known to man will be broken
in the next 1000 years, if not in the next 100 years. We
have already eaten of the Tree of Knowledge. It will only
be a matter of time until we eat of the Tree of (Eternal)
Life, relatively speaking.



I agree, if we manage to survive that long. Which I do not find all that
likely. Or at least if we do, our innate instincts will ensure that we
are at nowhere near the technical level we are today. More likely our
tendency to overpopulate, not plan ahead, and kill anyone who doesn't
look or think as we do will probably leave the survivors to emulate a
lifestyle more akin to the middle ages. There are even some nutters
among us who don't have a problem with that.

- 73 de Mike N3LI -

John Smith August 4th 08 07:20 PM

Vertical problem
 
Cecil Moore wrote:

...
"Whattaya mean 'we', White Man?" Every miracle performed
in "The Bible" can be performed by man today probably
including keeping a man technically dead for three
days and then reviving him (any volunteers?).

I suspect every technical "law" known to man will be broken
in the next 1000 years, if not in the next 100 years. We
have already eaten of the Tree of Knowledge. It will only
be a matter of time until we eat of the Tree of (Eternal)
Life, relatively speaking.


Interesting "take" on things ... and again, more correct than in error.
:-)

I am thinking about sending ya' the wifes pie plates ... grin

Regards,
JS

Cecil Moore[_2_] August 4th 08 07:21 PM

Vertical problem
 
Michael Coslo wrote:
Well, I don't think we can cover the entire earth with water past
the height of the tallest mountains. Like that ever happened tho'.


The original languages, like our own version of English,
had numerous definitions of "earth". I can cover the
"entire earth" in my handful of earth with a pint of water.

At the time of that original tale, man had absolutely no
concept of a 8000 mile diameter "planet earth". "Earth"
was as far (and as flat) as one could see and I have seen
Texas floods, in my lifetime, where nothing but water
could be seen. :-) Heck, I have been sailing on Clear
Lake, out by NASA, when I couldn't see anything but
water in all directions.
--
73, Cecil http://www.w5dxp.com

John Smith August 5th 08 12:29 AM

Vertical problem
 
John Smith wrote:
Cecil Moore wrote:
...


Cecil:

There are few times in life when a "mind", such as you/yours CAN display
an/multiple "interesting path(s)", as you do, to the likes of myself
-- it comes to "the attention", so frequently, and so rightly so. I
"feel good" about this ...

I only wish there were more of you ... hang it their man, God loves you!
(for krists' sake, I notice!)

With the most warmest regards,
JS

826[_2_] August 5th 08 11:48 AM

Vertical problem
 

"Owen Duffy" wrote in message
...
"826" wrote in
:

Hi,
Sorry I didn't rely sooner. The weather hasn't been too good hear.
This
morning I disconnected the coax from the shack and measured the
antenna with the six foot length of coax. It looked OK. I then
connected just the shield of the long coax going to the shack and
still measuring with the short coax it shifted just like measured
before in the shack. I have then made up a choke balun and installed
it at the base of the antenna and it improved everything by about 60%.
I will now make another one for the shack end. I think everything is
under control now. Thanks to all for heading me in the right
direction. Vern M0WQR


Vern, whilst the choke made a difference, the fact that there remains a
difference in the feedpoint impedance with the shield connected and
disconnected, even when using the choke, indicates that there is some
effects observable from common mode feed line current in your scenario.

If you want a measurement of the antenna as it would be used, measure it
as it would be used... make sure the shield current path is as it would
be used.

Owen

Hi all,
The antenna is now working very well on all bands. After installing both
choke baluns at the antenna base and in the shack, the resonant points
measured from the shack end were the same as with the short coax at the
antenna without the longer coax shield connected. Everything is OK now. All
it needed was the two baluns.
Regards
Vern M0WQR



J. B. Wood August 5th 08 12:23 PM

Vertical problem
 
In article , Cecil Moore
wrote:

John Smith wrote:
Things only get more interesting when we can "bend"
the laws ... ;-)


"Whattaya mean 'we', White Man?" Every miracle performed
in "The Bible" can be performed by man today probably
including keeping a man technically dead for three
days and then reviving him (any volunteers?).


Hello, Cecil, and not quite. I don't know what you mean by "keeping a man
technically dead" but I've haven't seen any reports on 5000 people being
fed with a couple of fish, two people who were quite dead brought back to
life or a person who was blind from birth given the capability of sight.
Or the silly notion that a human being could be killed and, with
assistance from a "higher authority", return to earth in physical form.
Of course a lot of folks find the very idea that these events could have
happened, let alone a couple of millenia ago, is a bunch of crap. Still
one must concede in spite of one's spiritual beliefs that given a
sufficient level of technology, one can indeed perform miraculous feats.
Perhaps we will be able to do (some of) these things some day, but not
today. Sincerely, 73s, and with apologies for injecting OT philosophy,

John Wood (Code 5550) e-mail:
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337

John Smith August 5th 08 05:25 PM

Vertical problem
 
J. B. Wood wrote:

...

Or the silly notion that a human being could be killed and, with
assistance from a "higher authority", return to earth in physical form.
...

John Wood (Code 5550) e-mail:
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337


I don't know about all that, I would look closer ... they are implanting
stem cells in the retina and restoring sight and all that now ... I
would at least do a complete search of the web first ...

However, you are quite correct "some people" do have some strange,
quaint and bizarre beliefs ... for example: the belief I can take a
handful of wood, glass, metal and plastic, toss 'em into a mud puddle
and come back a couple of million years later and start digging up
microwaves, cell phones, televisions, etc. (it is called, "evolution!")

Yep, you just can never tell what some people can be caused to believe!

Regards,
JS

John Smith August 5th 08 05:28 PM

Vertical problem
 
826 wrote:

...
Owen

Hi all,
The antenna is now working very well on all bands. After installing both
choke baluns at the antenna base and in the shack, the resonant points
measured from the shack end were the same as with the short coax at the
antenna without the longer coax shield connected. Everything is OK now. All
it needed was the two baluns.
Regards
Vern M0WQR



Your path sounds very similar to mine. At first, unless the plans/specs
called for a balun/choke, I ignored the need. Now I use one, or more,
no matter what ... I picked up that knowledge here. At first, the loss
of the balun/choke made me hesitant--I no longer worry about those
trivial matters. :-)

Regards,
JS


All times are GMT +1. The time now is 10:16 AM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com