"J. Mc Laughlin" wrote

Dear Reg (G4FGQ):

I note with interest that your note was written in the early
afternoon.

==========================================
My Dear J. Mc Laughlin,

Thank you for your interest in my early afternoon state of health. It
is now 19.15 hours and I have just started on a bottle of Sierra
Valley, Californian, Ruby Cabernet.

The subject of my communication is: small (much smaller than a
wavelength) - non-resonant (input impedance almost entirely
inductive if one
looks into a single opening in the loop) - horizontal - loop antenna
(no
substances with significant magnetic properties are in the vicinity
of the
loop antenna) - used to receive incident EM waves (which have both E
and H
components). SNRHL receiving antennas

I do not know the definition of a "magloop." Apparently, such a
beastie
comprises a resonant loop antenna.

=======================================
"Magloop" describes a small, single-turn, thick conductor, usually
made from copper water pipe, circular, hexagonal or square in shape,
loop. The two ends of the loop are connected together via a variable
capacitor. The capacitor tunes the inductance of the loop to a
resonant frequency at which everything happens.

The term "magnetic" arises because the near-field of a transmitting
loop is mainly magnetic as distinct from the electric field. On
receive it is more sensitive the magnetic field than the electric
field.
=======================================

No knowledgeable person would disagree that a single tuned
network with
a Q of 1000 is "narrow."

My interest in SNRHL receiving antennas comes from an interest
in
practical HF receiving antennas that are resistive to types of noise
that
appear only to be present at isolated, open, rural,
otherwise-low-noise
sites. The noise involved does not occur in urban areas or even
rural sites
with many trees.

=====================================
The noise in rural, open, oceanic areas is just the same sort as in
built-up, residential, city and industrial areas. It is all random but
there is just a lot less of it.

An antenna of any sort is just as sensitive to noise as it is to
signals provided both noise and signals are coming from the same
direction and elevation.
======================================

Consider some of the excellent wine from Michigan this evening.
This
state, with a coastline almost the same length as that of the island
of
Great Britain, produces some excellent products for your enjoyment.

=======================================
Everybody has heard of the State of Michigan with its capital city of
Detroit. I have always thought of it as an industrial state similar to
my own area of the city of Birmingham and the surrounding Black
Country of England. It is the manufacuring areas which produce the
REAL wealth of this World of ours. Not forgetting the farmers.

Never having had the opportunity to visit Michigan it has not occurred
to me that the land could also grow grapes and produce wine.
(Actually, we do produce respectable wine here in cool-climate
industrial England. But not much of it.)

It is now 20.00 hrs and too late to go shopping at my local
super-market. Nevertherless, at my next visit I shall keep my eyes
open for "Michigan" on the wine bottle labels.
----
Reg, G4FGQ.

On Sat, 1 Oct 2005 19:33:49 +0000 (UTC), "Reg Edwards"
wrote:


=======================================
Everybody has heard of the State of Michigan with its capital city of
Detroit. I have always thought of it as an industrial state similar to
my own area of the city of Birmingham and the surrounding Black
Country of England. It is the manufacuring areas which produce the
REAL wealth of this World of ours. Not forgetting the farmers.

Reg, G4FGQ.


Reg, I grew up in Michigan, and spend 6 mo a year here, the other 6 in Florida.
In all the time I've spent in Michigan I wasn't aware that Detroit is the
Capitol. When was it moved from Lansing? Perhaps Mac can help you out in this
dilemma you're creating.

Walt

Walt,

We are all sentimentally attached to the area where we were born. I
find it intriguing you were brought up in the same sort of industrial
region as I was dragged up in. There are a few descriptive paragraphs
in "A bit about Reg" in my website.

Please forgive me for assuming the largest city of Detroit to be the
political capital of Michigan when it is actually Lansing.

Again there is a similarity. The political capital of Warwickshire is
not the largest city of Birmingham but the small ancient town of
Warwick with its castle, not far from Shakespeare's
Stratford-upon-Avon.

Is Michigan named after an Indian tribe?
----
Reg.

Dear Reg (G4FGQ):
It is now likely to be past your bed time so this message may be
contemplated in the bright, clear morning.
I have inserted some items below.
--
J. Mc Laughlin; Michigan U.S.A.
Home:

"Reg Edwards" wrote in message
...

"J. Mc Laughlin" wrote

Dear Reg (G4FGQ):

I note with interest that your note was written in the early
afternoon.

==========================================
My Dear J. Mc Laughlin,

Thank you for your interest in my early afternoon state of health. It
is now 19.15 hours and I have just started on a bottle of Sierra
Valley, Californian, Ruby Cabernet.

--- You are commended for your assistance of our unfortunate brethren in
California. A good Midwesterner gives thanks at frequent intervals not to
be in crammed into California or out East. It is appropriate to observe
that the French would have no good grapes were it not for the Californian
growers.


The subject of my communication is: small (much smaller than a
wavelength) - non-resonant (input impedance almost entirely
inductive if one
looks into a single opening in the loop) - horizontal - loop antenna
(no
substances with significant magnetic properties are in the vicinity
of the
loop antenna) - used to receive incident EM waves (which have both E
and H
components). SNRHL receiving antennas

I do not know the definition of a "magloop." Apparently, such a
beastie
comprises a resonant loop antenna.

=======================================
"Magloop" describes a small, single-turn, thick conductor, usually
made from copper water pipe, circular, hexagonal or square in shape,
loop. The two ends of the loop are connected together via a variable
capacitor. The capacitor tunes the inductance of the loop to a
resonant frequency at which everything happens.

The term "magnetic" arises because the near-field of a transmitting
loop is mainly magnetic as distinct from the electric field. On
receive it is more sensitive the magnetic field than the electric
field.

--- I am obliged to you for providing a definition of "magloop." The
critical element of the definition seems to be that a magloop is a loop that
is resonated by a reactance.
--- I am puzzled by your observation with respect to the term "magnetic" in
conjunction with a loop antenna (presumably a loop antenna, whether or not a
magloop). You appear to be saying that a loop antenna is more sensitive to
the H field than to the E field of an incident EM field.
--- Relative to you, I have only been dealing with antennas a short 50
years. However, in that time, I have only encountered antennas that extract
a signal from an EM field where the ratio of E to H is well established. My
graduate professor, who recently passed away and who wrote The Book on
antennas, never mentioned antennas that inherently were sensitive to one
component of the incident EM wave.
--- Perhaps what you were saying is that one can predict the polarization of
an EM wave launched from a loop antenna from knowing its geometry and the
observer's orientation with respect to the geometry. This is also true for
a doublet and a number of other antennas.

=======================================

No knowledgeable person would disagree that a single tuned
network with
a Q of 1000 is "narrow."

My interest in SNRHL receiving antennas comes from an interest
in
practical HF receiving antennas that are resistive to types of noise
that
appear only to be present at isolated, open, rural,
otherwise-low-noise
sites. The noise involved does not occur in urban areas or even
rural sites
with many trees.

=====================================
The noise in rural, open, oceanic areas is just the same sort as in
built-up, residential, city and industrial areas. It is all random but
there is just a lot less of it.

--- I do not have the verbal skill of Richard Clark, who could find an
elegant way to say what needs to be said. Dear Reg, you are wrong. You are
wrong because your long and extensive carrier has not placed you in the
sites described. Had you spent time out in the sticks, bare of same, you
would have encountered the discharging of charged particles into the antenna
you were using (or discharging into nearby conductors) producing a
prodigious amount of excess noise. The particles are sometimes dust
particles, sometimes water droplets, and sometime snow. By far, the
greatest limitation on the performance of an HF receiving site in rural,
open country is the sudden appearance of this noise. Even at VHF, it is
sometimes a limiting factor. State Police posts in Michigan have sometimes
not been able to communicate with 100 watt mobiles that were less than 300
meters away because of this noise appearing in a snow storm. (Movement to
much higher frequencies and other strategies have alleviated their problem.)
--- My experience does not extend to extensive receiving sites out to sea.
They might, it they exist at all, not encounter the excess noise. It is
also clear that high air humidity may serve to reduce the excess noise.
--- Please add to your vast reservoir of knowledge something new.
---

An antenna of any sort is just as sensitive to noise as it is to
signals provided both noise and signals are coming from the same
direction and elevation.
======================================

Consider some of the excellent wine from Michigan this evening.
This
state, with a coastline almost the same length as that of the island
of
Great Britain, produces some excellent products for your enjoyment.

=======================================
Everybody has heard of the State of Michigan with its capital city of
Detroit. I have always thought of it as an industrial state similar to
my own area of the city of Birmingham and the surrounding Black
Country of England. It is the manufacuring areas which produce the
REAL wealth of this World of ours. Not forgetting the farmers.

--- Well said! Michigan has had the most productive industry in the world.
It also has some of the most productive agricultural land - especially for
being in the north. However, Michigan (and others) are going through a
major change. The advent of fast, inexpensive communication and
transportation have seen the movement of vast numbers of manufacturing jobs
to areas where wages are low. Many square miles of factories have been
pulled-down to bare ground. (Taxes are thus reduced - often next to
impossible to sell the land because of unknown pollutants from 90 or more of
industrial use.) Ascendant in Michigan are jobs that produce intellectual
property, that are involved with higher education, and that are involved
with medicine including research. The new worker is different.

--- While Detroit is still the largest city, the capital is in Lansing.

Never having had the opportunity to visit Michigan it has not occurred
to me that the land could also grow grapes and produce wine.
(Actually, we do produce respectable wine here in cool-climate
industrial England. But not much of it.)

---Michigan is almost surrounded by very large lakes that mollify the
weather. The west coast of Michigan, in particular, has very productive
fruit farming. It is quite possible that few of Michigan's grape products
are exported. Thank you for considering another of our products for your
evening repast.

It is now 20.00 hrs and too late to go shopping at my local
super-market. Nevertherless, at my next visit I shall keep my eyes
open for "Michigan" on the wine bottle labels.
----
Reg, G4FGQ.

Michigan has had the most productive industry in the world.
It also has some of the most productive agricultural land -
especially for
being in the north. However, Michigan (and others) are going
through a
major change. The advent of fast, inexpensive communication and
transportation have seen the movement of vast numbers of
manufacturing jobs
to areas where wages are low. Many square miles of factories have
been
pulled-down to bare ground. (Taxes are thus reduced - often next to
impossible to sell the land because of unknown pollutants from 90 or
more of
industrial use.) Ascendant in Michigan are jobs that produce
intellectual
property, that are involved with higher education, and that are
involved
with medicine including research. The new worker is different.

=========================================
Dear J.

Birmingham and the Black Country has suffered a similar fate. Once
upon a time EVERYTHING was made in Birmingham. I began work at the age
of 14 in an electric motor factory. (I've never met a university
professor.) Factories have now been converted to museums as an adjunct
to the tourist trade.

Only this very week, the last of the once-upon-a-time many Black
Country iron foundries poured the last few tons of molten iron from
its furnaces. Sadly, three months back the last of the 100-year old
motor factories, which started with bicycles, closed its gates
rendering 15,000 people redundent. Motor production is to continue in
China. Not that I have anything against the enterprising, hard-working
Chinese who bought the factory complete with the intellectual
property. Good luck to 'em.

The rot set in with Lady Maggie Thatcher who favoured the so-called
'service industries'. Now we have Blair who's selling off the Health
Service and has loaned the British Army, free of charge, to the
Americans. But we can't get rid of him until Bush has gone.

Now back to, the always with us, SWR. ;o)
----
Yours, Reg.

Dear Reg:

In both of our countries, major changes are occurring. In the truly
creative sphere, the English speaking countries are still ahead. Education
in the "hard" subjects is critical.
Well now, Reg, you have at last met (via the Internet) an actual
university professor of electrical engineering.
73, Mac N8TT

--
J. Mc Laughlin; Michigan U.S.A.
Home:

"Reg Edwards" wrote in message
...
Michigan has had the most productive industry in the world.
It also has some of the most productive agricultural land -
especially for
being in the north. However, Michigan (and others) are going
through a
major change. The advent of fast, inexpensive communication and
transportation have seen the movement of vast numbers of
manufacturing jobs
to areas where wages are low. Many square miles of factories have
been
pulled-down to bare ground. (Taxes are thus reduced - often next to
impossible to sell the land because of unknown pollutants from 90 years
or
more of
industrial use.) Ascendant in Michigan are jobs that produce
intellectual
property, that are involved with higher education, and that are
involved
with medicine including research. The new worker is different.

=========================================
Dear J.

Birmingham and the Black Country has suffered a similar fate. Once
upon a time EVERYTHING was made in Birmingham. I began work at the age
of 14 in an electric motor factory. (I've never met a university
professor.) Factories have now been converted to museums as an adjunct
to the tourist trade.

Only this very week, the last of the once-upon-a-time many Black
Country iron foundries poured the last few tons of molten iron from
its furnaces. Sadly, three months back the last of the 100-year old
motor factories, which started with bicycles, closed its gates
rendering 15,000 people redundent. Motor production is to continue in
China. Not that I have anything against the enterprising, hard-working
Chinese who bought the factory complete with the intellectual
property. Good luck to 'em.

The rot set in with Lady Maggie Thatcher who favoured the so-called
'service industries'. Now we have Blair who's selling off the Health
Service and has loaned the British Army, free of charge, to the
Americans. But we can't get rid of him until Bush has gone.

Now back to, the always with us, SWR. ;o)
----
Yours, Reg.

Dear Prof.,

I too am concerned about the abysmal and still falling standards of
education in our schools and universities.

Prof., I am very pleased to have met you.
----
Reg, G4FGQ