ART - Your Many Posts
 

Rather than continually posting your beliefs about *why* your Unwin antenna
operates, please post some provable evidence about *how* it operates with
respect to the fields generated by a standard and well-proven radiator such
as 1/2-wave dipole.

A matched, 100% efficient, linear 1/2-wave dipole with 100 watts of applied
r-f input power at 3.5 MHz develops a peak field intensity of about 70.14
mV/m at a distance of 1 kilometer, in free space.

How does the Unwin antenna compare to this?

If you don't know, or you do and it is considerably less than the value
above -- then probably there is little point in proceeding with your posts.

RF

ART - Your Many Posts
 

Richard Fry wrote:
"How does the Unwin antenna compare to this?"

Yes. I would suggest an A to B comparison with a side by side standard
dipole.

Best regards, Richard Harrison, KB5WZI

ART - Your Many Posts
 

On Jul 8, 6:26 am, "Richard Fry" wrote:
Rather than continually posting your beliefs about *why* your Unwin antenna
operates, please post some provable evidence about *how* it operates with
respect to the fields generated by a standard and well-proven radiator such
as 1/2-wave dipole.

A matched, 100% efficient, linear 1/2-wave dipole with 100 watts of applied
r-f input power at 3.5 MHz develops a peak field intensity of about 70.14
mV/m at a distance of 1 kilometer, in free space.

How does the Unwin antenna compare to this?

If you don't know, or you do and it is considerably less than the value
above -- then probably there is little point in proceeding with your posts.

RF

I have enougth on my hands explaining antennas in equilibrium and you
want me to change course in the middle
and switch to what. you want to talk about! I'll tell you what, refer
to what happens to a current carrying member
as descibed on my page. Now go to a member that is not in equilibrium
and where the external charges move
to one end to meet Newtons law and thus charges in the center which
formally were equal to zero now have a quantitive value.
This states that when equilibrium breakjs down current flowsw in the
CENTER of the conductor.
Start your own thread on that subject while we continue with antennas
in equilibrium

ART - Your Many Posts
 

Art wrote:
"This states that when equilibrium breaks down current flows in the
CENTER of the conductor."

Fact is, only direct current flows in the center of the conductor
because alternating current makes more counter emf in the center of the
conductor than in the exterior. There are more total magnetic flux
linkages at the center and voltage is produced by the rate of change of
these linkages. So, current drnsity is greater as the external surface
of the conductor is approached.

Equilibrium is synonymous with balance or being at rest. An EM wave is
never at rest. A "balanced antenna" has equal capacitance to earth from
both of its feed terminals. Balanced and unbalanced antennas perform
equally well though in application one may be more suitable than the
other. A ground plane may be more easily fed by coax than a dipole but
both have the same power gain. There is no mystic advantage of
equilibrium in an electrical sense, only in contrived nonsense.

Best regards, Richard Harrison, KB5WZI

ART - Your Many Posts
 

On Jul 9, 10:43 am, (Richard Harrison)
wrote:
Art wrote:

"This states that when equilibrium breaks down current flows in the
CENTER of the conductor."

Fact is, only direct current flows in the center of the conductor
because alternating current makes more counter emf in the center of the
conductor than in the exterior. There are more total magnetic flux
linkages at the center and voltage is produced by the rate of change of
these linkages. So, current drnsity is greater as the external surface
of the conductor is approached.

Equilibrium is synonymous with balance or being at rest. An EM wave is
never at rest. A "balanced antenna" has equal capacitance to earth from
both of its feed terminals. Balanced and unbalanced antennas perform
equally well though in application one may be more suitable than the
other. A ground plane may be more easily fed by coax than a dipole but
both have the same power gain. There is no mystic advantage of
equilibrium in an electrical sense, only in contrived nonsense.

Best regards, Richard Harrison, KB5WZI

Sooner or later you will have to change your attitude. Terman was in
error by not including the WEAK force such that a radiator was tilted
and you are still clinging to his line of thought. Think about it
Originally I dampened my antenna by using the
pendulum as a equivalent mechanical example and you saw on my page the
resulting change in the oscillations.
Now you can do the opposite if you have a half wave antenna!. So what
has happened? The half wave is still resonant and the circuit has also
changed to a series circuit so we have lost the energy retention
propertes of the TANK circuit ! At the same time we must still retain
the closed system circuit which means the current must also travel
down the center of the radiator! Imagine that As an old ham who can't
change his ways you can create havoc about that.
Now when the charges move down the center of the radiator it cannot
provide eddy currents so the "skin" resistance is absent during that
part of the perioid.
Note by travelling down the center as a half wave it does not need a
counter poise because going down the center makes it a full wave
circuit.
Ofcourse for any other fraction of a wavelength you have to extent the
resistive portion of the center of the radiator in the form of radials
so that
the closed circuit is a wavelength or a multiple there of. Instead of
the radials in that case you can use instead a variometer so the
properties of wave length multiples are retained. Now if you can;'t
accept this simple logic ask somebody to use a antenna program to
determine the best angle for a vertical to attaim maximum vertical
radiation in the same terms that the masters intended with the correct
useage of their laws. Krauss did by finding the WEAK force
empirically even tho he did not understand why which was why the
helix radiating portion is at an angle with respect to the earths
surface.Note He also proved that a radiator need not be straight by
experimentation without resorting to Gauss when the dynamic extension
is applied
Use of any antenna computer program will produce this same angle with
straight radiators unless preguided to a planar form! So Richard,
saying it is a myth or a fraud is probably O.K. for you because of
your age, but for the younger engineers thay cannot afford not to
change and be left behind in the search of knoweledge. So no further
debate or auguements are necessary between you and I. And I will try
to remember to send flowers when the grim reaper appears at your door
where your position on antennas will matter no more while the rest
move on
and it is only the copper losses or resistance we have to deal with.
Richard, you can;'t mess with mother nature or the Universe

ART - Your Many Posts
 

Congratulations Art! You've really out done yourself this time.
May the 'weak' force be with you...
- 'Doc

ART - Your Many Posts
 

On Jul 9, 4:17 pm, wrote:
Congratulations Art! You've really out done yourself this time.
May the 'weak' force be with you...
- 'Doc

Thank you Mr Midwife which you have now upgraded to Doctor
Delivering a baby in my Mercedes would be a piece of cake.
But in a mini cooper,well.......

ART - Your Many Posts
 

"Art Unwin" wrote:
I have enougth on my hands explaining antennas in equilibrium and you
want me to change course in the middle and switch to what. you want
to talk about!
__________________

First things first, Arthur.

Why do you persist in posting and defending your unproven and zany beliefs
about equilibrium, particles etc that you suggest apply to your "Unwin"
antenna, if you don't even know how the free-space radiation envelope from
your Unwin antenna compares to that of a proven reference radiator, for a
given applied power?

The RADIATION performance of a transmit antenna should be considered before
everything else. Even a 1:1 SWR at the "antenna" input terminals over an
infinite bandwidth means ~nothing if very little to none of the r-f power
applied there is radiated in the form of an EM wave.

Why should any serious investigator be interested in reading about how you
think your Unwin antenna operates, if you can't *first* evaluate, publish,
and scientifically defend its free space radiation characteristics as
compared to a known standard radiator, such as that of a resonant,
center-fed, 1/2-wave dipole?

RF

ART - Your Many Posts
 

On Jul 9, 5:47 pm, "Richard Fry" wrote:
"Art Unwin" wrote:
I have enougth on my hands explaining antennas in equilibrium and you
want me to change course in the middle and switch to what. you want
to talk about!

__________________

First things first, Arthur.

Why do you persist in posting and defending your unproven and zany beliefs
about equilibrium, particles etc that you suggest apply to your "Unwin"
antenna, if you don't even know how the free-space radiation envelope from
your Unwin antenna compares to that of a proven reference radiator, for a
given applied power?

The RADIATION performance of a transmit antenna should be considered before
everything else. Even a 1:1 SWR at the "antenna" input terminals over an
infinite bandwidth means ~nothing if very little to none of the r-f power
applied there is radiated in the form of an EM wave.

Why should any serious investigator be interested in reading about how you
think your Unwin antenna operates, if you can't *first* evaluate, publish,
and scientifically defend its free space radiation characteristics as
compared to a known standard radiator, such as that of a resonant,
center-fed, 1/2-wave dipole?

RF

Yup, it is difficult, But I trust my logic in the face of contrary
statements that have no logic.
How can anybody supply a theory based solely on mathematic
tumbles....... but they do.
How can people who oil tractors and the like on road building and
nothing else and
call themselves engineers,...but they do. Some engineers put a wig on
their heads
and from then call themselves judges........but they do! Some
people unlock the doors
of a radio station every morning and call themselves broardcast
engineers no less
...............but they do!

ART - Your Many Posts
 

Art says,
Yup, it is difficult, But I trust my logic in the face of contrary
statements that have no logic.

And that's fine. But what about trusting your logic in the face of
contrary statements that do have logic? That's not so fine, is it?

You've heard that old expression, "Put up or shut up."? Now's the
time.

And with that, this 'midwife' self-promoted to 'doctor' will retire
gracefully from this nonsense.
- 'Doc

(if I could figure a way to bag this whole thing I could make a
fortune in the fertilizer 'bid-nez'!)