Loading Coils; was : Vincent antenna
 

On Wed, 05 Dec 2007 15:43:11 GMT, Cecil Moore
wrote:

Toroidal current pickup coils designed by W7EL
with the standard voltage probes.
What did you load those pickup coils with?
Do you have an URL to the design?

Loading Coils; was : Vincent antenna
 

"art" wrote

"The resultant vector of all vectors involved with radiation"
is ONE vector. If it "can NEVER be at right angles to the axis
of a radiator" then how can a monopole have any radiation
in such directions?

RF

I have had it with you and your senior moments and misquotes.
I asked you to stop so you had fair warning
PLONK. Enough is enough
Art Unwin KB9MZ....xg (uk)
________________

Art may have plonked me, but if so it was because I DID understand what he
wrote -- not that I didn't.

But at least now he won't have to respond to this reality.

RF

Loading Coils; was : Vincent antenna
 

On 5 Dec, 10:39, (Richard Harrison) wrote:
Art wrote:

The resultant vector of all vectors involved with radiation can NEVER be
at right angles to the axis of the radiator. PERIOD."

A radial mode helix can and does work, despite Art`s apparent
disputation.

The radial mode helix acts as a stacked horizontal loop antenna. Hams
routinely use horizontal loops for more bandwidth with less drivepoint
resistance variation in a centerfed half wavelength of wire. When the
length of wire goes from 0,5 WL to 0.6 WL the dipole increases its
resistance from 70 ohms to 140 ohms. The loop feedpoint increases from 5
ohms to 7 ohms (theat`s less than a double as in the dipole. This
information is found in Figs 7-19 and 8-14 of Bailey`s "TV and Other
Receiving Antennas".

Best regards, Richard Harrison, KB5WZI

Richard, look again at the phrase "resultant vector"
which means it is one vector.
This angle is reflected by the "Pitch" in a
helical antenna.
All the other words are unnessesary and non relavent
with respect to RESULTANT VECTOR.
Art

Loading Coils; was : Vincent antenna
 

Gene Fuller wrote:
. . .
* EZNEC does not know or care about "standing waves" and "traveling
waves". As has been explained many times, the NEC-based simulation tools
simply look at the total current, without making any philosophical value
judgments about the mobility of the waves. It is clear that you have
loaded some sort of conditions into EZNEC that you believe represent
standing waves and traveling waves. However, the argument becomes
completely circular at that point, as you have loaded the conditions
that give exactly the results you desire. If there is a hidden "wave
type" parameter in EZNEC, please let us know. I will humbly retract my
criticism.
. . .

You are of course completely right, and I've explained this to Cecil
several times. But he seems to have difficulty with the concept of
current as being simply the rate of charge flow. EZNEC does not, either
in internal calculations or in reporting, split the current into any
kind of "traveling wave", "standing wave", or any other kind of wave
components.

Anyone interested in the details of EZNEC calculations can find them in
the NEC-2 manual which is available on line.

Roy Lewallen, W7EL

Loading Coils; was : Vincent antenna
 

On 5 Dec, 10:51, (Richard Harrison) wrote:
Art wrote:

"The resultant vector of all vectors involved with radiation can NEVER
be at right angles to the axis of the radiator. PERIOD."

I`ve already defended the radial mode helix, but think of almost any
simple antenna. Doesn`t the half-wave dipole dradiate principally at
right angles to its axis?

Best regards, Richard Harrison, KB5WZI

It doesw radiate at right angles of the axis but for maximumum
radiation of a particular TYPE then the resultant maximum radiation
vector is between ten and fifteen degrees from the ninety angle.
The total radiation is the same at right angles as to that when tilted
10 degrees or more from that angle.
If you play with the angles on any computor program including EZNEC
I suppose, using a wavelength radiator, this is readily seen
Remember, do not stray from the term "RESULTANT VECTOR" which
is the subject of discussion.End of discussion
Art
Art

Loading Coils; was : Vincent antenna
 

On Wed, 5 Dec 2007 12:18:17 -0800 (PST), art
wrote:

do not stray from the term "RESULTANT VECTOR"

It might help to know the vector units;
it might help to know result of what vector operation.

73's
Richard Clark, KB7QHC

Loading Coils; was : Vincent antenna
 

"art" wrote
It doesw radiate at right angles of the axis but for maximumum
radiation of a particular TYPE then the resultant maximum radiation
vector is between ten and fifteen degrees from the ninety angle.
The total radiation is the same at right angles as to that when tilted
10 degrees or more from that angle.
If you play with the angles on any computor program including
EZNEC I suppose, using a wavelength radiator, this is readily seen
______________

Below is table of free-space field values for the radiation of a vertical,
full-wave, center-fed dipole, from the horizontal plane to +/- 60 degrees of
elevation, using the "resultant maximum radiation vector."

Note that an elevation angle of zero degrees is at right angles to this
radiator.

Please explain how this validates the theory stated in your quote above.

RF

EZNEC Demo ver. 4.0

Art's Tilt Theory of Radiation 12/5/2007 2:56:18 PM

--------------- FAR FIELD PATTERN DATA ---------------

Frequency = 1 MHz

Field in mV/m for 1 kW at 1 km

Elevation Pattern Azimuth angle = 0 deg.
Deg V Fld
0 - 270.51
5 - 266.37
10 - 254.31
15 - 235.32
20 - 210.94
25 - 182.99
30 - 153.43
35 - 124.07
40 - 96.47
45 - 71.82
50 - 50.87
55 - 34.00
60 - 21.24

Loading Coils; was : Vincent antenna
 

On 5 Dec, 12:35, Richard Clark wrote:
On Wed, 5 Dec 2007 12:18:17 -0800 (PST), art
wrote:

do not stray from the term "RESULTANT VECTOR"

It might help to know the vector units;
it might help to know result of what vector operation.

73's
Richard Clark, KB7QHC

Loading Coils; was : Vincent antenna
 

On 5 Dec, 12:35, Richard Clark wrote:
On Wed, 5 Dec 2007 12:18:17 -0800 (PST), art
wrote:

do not stray from the term "RESULTANT VECTOR"

It might help to know the vector units;
it might help to know result of what vector operation.

73's
Richard Clark, KB7QHC

Richard
You surely know that there are magnetic vectors, electric vectors
and ofcourse curl. You don't need to know the vector units
to see that the resultant vector cannot be on the same axis
as the radiator!
Ofcourse the total amount of radiation does not change with tipping
the radiator a few degrees, but what type of radiation with
respect to polarisation that make up total radiation surely DOES.
Now Terman did not mention that as he surely would have if
it were true!
Hoping you do not have a relapse with respect to my postings
Regards
Art Unwin KB9MZ

Loading Coils; was : Vincent antenna
 

On Wed, 5 Dec 2007 13:51:57 -0800 (PST), art
wrote:

You surely know that there are magnetic vectors, electric vectors
and ofcourse curl. You don't need to know the vector units
to see that the resultant vector cannot be on the same axis
as the radiator!

Still and all, what is the unit for the Resultant Vector?

What operation did you perform that it is the result of?

73's
Richard Clark, KB7QHC