The Westlakes news broadcast is transmitted
every Sunday at 9am on
2 meters at 146.900
(the Hunter Radio Group's Repeater)
WARC News Broadcast Sunday 16-9-2018
Yesterday at the club saw a pretty good roll out but
then with the weather we had, why wouldn’t you? It was
good to see Col VK2YP get a leave pass out of Medowie
for the day. He was hoping to catch up with our new
slithery member on the Seat of Knowledge, but nothing
was seen of him. Maybe Col should have brought him a
kumquat or two.
Michael VK2OB rocked up with his good lady to renew
acquaintances, as he hadn’t been seen at the club for
Lloyd VK2XAA gave the first of his technical talks which
was well received by those present.
At this time we have to advise of a repeat barbeque at
Warner’s Bay as the winner of the meat tray again was
Allan VK2AJG. It would appear that he wants to make a
habit of it. Congratulations Allan and enjoy.
Monday was a bit of a slow start to the net with about
half of us dragging the chain and delaying our presence
on the net. It was noted that Col VK2YP was a bit of a
wobbly signal, albeit Col reckoned he was a bit wobbly
going to the Shack. Glenn VK2GST was after anyone who
knew anything about spray on glue and after last week’s
quiz at the end of last Sunday’s news broadcast he also
wanted to know how big the glove box was. Confused?
Stick around at the end of the Sunday news broadcast
next week and find out.
On Wednesday everyone was relishing the thought of a hot
day. Ken VK2UTC was down at the Club Rooms and decided
to have a look for our new slithery member, but gave up
the search rather quickly. Col VK2YP was down on peddle
power with an Amplifier issue, and Allan VK1Al was yet
again testing out another antenna which was putting up a
pretty good signal this way. Dan VK2GG had survived the
weekend after helping out with Wicen on the Great
At the club, Jeff VK2MCD and Glenn VK2GST finished
installing some blinds which were donated by Lloyd
VK2XAA. It was also good to see one of our new members
Bruce VK2GU spending some time with us on Wednesday
familiarising himself with our operations. Also Jamie
VK2YCJ was testing out some of the antennas and
transmitting equipment. Also later in the week Alex
VK2ZM was helping out with maintenance/repairs to the
ride on mower.
Greg VK2CW was entertaining builders and painters who
informed him that his stink pipe needed replacing, but
with his VHF, UHF and 6 metre antennas all attached,
this was not going to be as easy as it sounded.
On Friday Greg still had the painters around and with
his feeder lines to his antennas disconnected, Jeremy
VK2LDX jumped into the driver’s seat for the net. Col
VK2YP had been spending the week untangling his feed
lines and thereby stopped his RF problems, but it did
nothing for his kumquat problems, as the kumquat tree is
still overloaded. Steve VK2NCS was having transmission
problems in that every time he pushed the button,
nothing happened. It was the quietist that Bulahdelah
has been in ages.
In this month’s bit of historical research we are going
to have a look at Heinrich Rudolf Hertz who first
conclusively proved the existence of electromagnetic
waves. Born in 1859 in Hamburg, Heinrich was the son of
a lawyer. While he started school at the age of six, it
was later during his school life he developed an
aptitude for practical subjects and developed a liking
While at the Grammar School in Hamburg he learnt Arabic
and Sanskrit (an ancient Indian language). He later
spent a year in Berlin for his military service but
later entered a university in Munich to study sciences
and engineering. He then went back to Berlin where he
met Hermann von Helmholtz while further studying the
Shortly after arriving back in Berlin he won a
competition by showing that electricity had no inertia.
Helmholtz recognised Hertz’s genius when he gained his
Ph D, at which time Helmholtz made Heinrich his
In 1883 Hertz took up a post as lecturer in theoretical
physics at Kiel University and in 1885 he became a full
professor at the University of Karlsruhe where he
discovered electromagnetic waves.
In 1886 he began a series of experiments to clarify some
of the theoretical predictions of James Maxwell’s
electromagnetic theory. He experimented with spark gaps
which lead to photoelectric effect.
With his experiments, Hertz wanted to show that the
speed of electromagnetic waves was finite in air and in
vacuum, thus concluding that air and dielectric
insulators act in the same manner. He at first noticed
that he obtained a much greater reaction at his second
spark gap than would be allowed by the normal laws of
propagation of force, which generally predict a
diminished action with distance. From this he racialized
that he was producing electromagnetic waves, which were
retaining their power of action over longer distances.
Not only was he able to produce these waves but he also
determined their properties, such as reflection and
refraction. His published results were generally
accepted by the scientific community. When publicized by
others, such as physicists Oliver Lodge and George
Fitzgerald, who were working in the same field, his
results soon launched an all-out effort to use the
phenomena for the purposes of communication, resulting
in the invention of radio at the end of the next decade.
One of Hertz's students, Philipp Lenard, continued
Hertz's electrical researches into cathode rays.
After his work on electromagnetic waves, Hertz turned to
one of his original fields of interest, mechanics. He
wrote an important work, The Principles of Mechanics
Presented in a New Form, that attempted to remove
ambiguity and confusion in the various presentations up
to that time.
In 1892, an infection was diagnosed (after a bout of
severe migraines) and Hertz underwent some operations to
correct the illness. He died of blood poisoning at the
age of 36 in Bonn, Germany. What would have been had he
lived to a ripe old age.
Like many of the scientists of his time, Hertz did not
understand the wide-ranging potential applications of
his production and detection of electromagnetic
radiation. His original purpose was to demonstrate
certain principles contained in Maxwell's theory. Had
not others, such as Lodge and Fitzgerald, been working
in the same field, his work and its applications might
not have been well understood.
Heinrich Hertz's nephew Gustav Ludwig Hertz was a Nobel
Prize winner, and Gustav's son Carl Helmut Hertz
invented medical ultrasonography. His daughter Mathilde
Carmen Hertz was a well-known biologist and comparative
psychologist. Hertz's grandnephew Hermann Gerhard Hertz,
professor at the University of Karlsruhe, was a pioneer
of NMR-spectroscopy and in 1995 published Hertz's
laboratory notes. A good definition of keeping it in the
The SI unit hertz (Hz) was established in his honour by
the International Electro technical Commission in 1930
for frequency, an expression of the number of times that
a repeated event occurs per second. In 1960, it
officially replaced the previous name, "cycles per
Finally “What’s on & when?”
Last day for tendered equipment 1300hrs Sat 22nd
ARNSW Trash & Treasure sale – Dural Sun 23rd September
General Meeting Day Sat 13th October
Talk on Model Trains – Digital TV VK2LGW Sat 20th
Westlakes ARC Field Day – Teralba Sun 28th October
Xmas Party – all B Y O – Teralba Sat 15th December
This is the news we have for you this week. 73.