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WESTLAKES
Amateur Radio Club Inc.

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The Westlakes Weekly Broadcast.

The Westlakes news broadcast is transmitted 
every Sunday at 9am on 2 meters at 146.900 MHz
(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 some time.

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 Northern Walk.

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 for languages.

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 sciences.

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 assistant.

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 family.

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 second" (cps).

Finally “What’s on & when?”
Last day for tendered equipment 1300hrs Sat 22nd September
ARNSW Trash & Treasure sale – Dural Sun 23rd September
General Meeting Day Sat 13th October
Talk on Model Trains – Digital TV VK2LGW Sat 20th October
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.

    

 

 

 


Westlakes Amateur Radio Club Inc. York Street, Teralba NSW