We just graduated this mom and her two kids from our recent on-line course. The kids are age 11 and 13 and passed the written exam AND a CW endorsement with neighbour Guy VA7GI coaching them.
Congratulations and see you on the bands.
We just graduated this mom and her two kids from our recent on-line course. The kids are age 11 and 13 and passed the written exam AND a CW endorsement with neighbour Guy VA7GI coaching them.
Congratulations and see you on the bands.
New desktop publishing software opens up even more possibilities for the SARC Communicator, the digital periodical of Surrey Amateur Radio Communications. This issue is now available for viewing or download. Another new feature is a smaller version, best suited for mobile devices, available here for viewing or download. The advantage of the larger version being higher resolution graphics and photos.
The best new feature, in my opinion, is the ability to provide you with a compete Table of Contents [below]. This should enable better accessibility from search engines.
You will find some great articles in this issue, along with our regular columnists.
Now read in over 165 countries, we bring you 120+ pages of Amateur Radio content from the Southwest corner of Canada and elsewhere. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.
Download the January - February Communicator in
LARGE or SMALL format, or read it on-line like a magazine
As always, thank you to our contributors, and your feedback is always welcome.
The deadline for the next edition is February 15th.
If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at communicator@ve7sar.net
73,
John VE7TI
'The Communicator' Editor
Read in over 150 countries, we bring you 120+ pages of Amateur Radio content from the Southwest corner of Canada and elsewhere. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.
You can view or download it as a .PDF file:
As always, thank you to our contributors, and your feedback is always welcome.
The deadline for the next edition is August 15th.
If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at communicator@ve7sar.net
73,
John VE7TI
'The Communicator' Editor
Read in over 150 countries, we bring you 120 pages of Amateur Radio content from the Southwest corner of Canada and elsewhere. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.
You can view or download it as a .PDF file:
As always, thank you to our contributors, and your feedback is always welcome.
The deadline for the next edition is April 15th.
If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at communicator@ve7sar.net
73,
John VE7TI
'The Communicator' Editor
Read in over 145 countries, we bring you 120 pages of Amateur Radio content from the Southwest corner of Canada and elsewhere. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.
You can view or download it as a .PDF file:
As always, thank you to our contributors, and your feedback is always welcome.
The deadline for the next edition is February 15th.
If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at communicator@ve7sar.net
73,
John VE7TI
'The Communicator' Editor
Read in over 145 countries, we bring you 134 pages of Amateur Radio content from the Southwest corner of Canada and elsewhere. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.
You can view or download it as a .PDF file:
As always, thank you to our contributors, and your feedback is always welcome.
The deadline for the next edition is December 15th.
If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at communicator@ve7sar.net
73,
John VE7TI
'The Communicator' Editor
Read in over 145 countries now, with almost 10,000 downloads for the November-December issue, we bring you over 100 pages of Amateur Radio news from the South West corner of Canada and elsewhere. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.
You can view or download it as a .PDF file:
As always, thank you to our contributors, and your feedback is always welcome.
The deadline for the next edition is February 15th.
If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at communicator@ve7sar.net
73,
John VE7TI
'The Communicator' Editor
Looking back, it is ironic that Jim wrote the following about Brett Garrett VE7GM when Brett passed away in August 2018
"They often say that 20% of a given membership do 80% of the work... Brett was one of the 20%, no, more like 5%. An active member of both the Surrey Amateur Radio Club (SARC) and Surrey Emergency Program Amateur Radio (SEPAR), Brett freely shared his knowledge and led Surrey Amateurs to two very successful Field Days."
I can attest to the same about Jim Smith VE7FO and his involvement with VECTOR and SARC.
I first became aware of Jim when I laid the groundwork for the Vancouver Emergency Community Telecommunications ORganization (VECTOR) around 1999. Jim lived in the Dunbar area of Vancouver, and I became aware of his involvement with the Point Grey club, and that he was very knowledgeable about HF.
Jim was an avid contester who enjoyed working all modes -- especially CW and RTTY. A true mentor at heart, he often hosted "newbies" at his Vancouver home to introduce them to contesting. Many a new contester was given real experience operating "in the fray" and encouraged to keep honing their skills.
That knowledge translated into a very successful series of first Field Days for VECTOR. Jim also took on the project of planning the HF tower and antennas at e-Comm, the regional 9-1-1 and dispatch centre. That facility also houses the Vancouver EOC and its Amateur Radio component. Jim was a terrific resource in suggesting what might and might not work for that location, and he got that tower completed and functional. It was also Jim who persuaded me to look at offering our own Basic Amateur Radio classes. Well... 22 years later we are still offering them with the same basic content that we worked on back then, except now they are provided by Surrey Amateur Radio Communications (SARC), on-line, with successful students across Canada and even graduates abroad.
VECTOR Field Day (about 2003) Jim VE7FO as Station Manager in the new VECTOR bus.
Fred VE7CX in the foreground.
Around the time that I left VECTOR for the SARC group in 2004, Jim decided that he too would become a member of SARC. What followed was a mentorship program to introduce new members to contesting, one of Jim's passions. I spent many hours at his QTH working various contests under Jim's expert tutelage.
In one of many articles written for our SARC newsletter 'The Communicator', Jim wrote:
"My own involvement with SARC started when I was recruited by John VE7TI, as a Field Day operator. There are many enjoyable ways of conducting FD which range from everyone sitting around the BBQ, telling stories and making a few contacts to the hard-core contest style where everybody goes all out to WIN. I was told that it would be a hard core, win for Canada situation. Being a hard-core contester myself I took the bait.
Well, it turned out that the operators, while enthusiastic, didn't have the HF contest experience necessary to achieve the goal. Nonetheless, it was obvious that the potential was there so, once FD was over, I joined the Club and made a FD training proposal to the Exec with the goal of winning for Canada, which was accepted.
This training started in October and ran until next year's FD. It consisted of many formal training sessions including classroom style and participation in the major contests, during which the ops received coaching on the operating techniques for maximizing the number of contacts per hour.
This would be a very significant investment of time for the trainees. This "Get Your Feet Wet" program to provide a low commitment introduction to contesting so that they could see whether or not they liked it."
Jim was instrumental as well in the team organizing what was probably SARC's best scoring Field Day ever. It was in 2015 and, encouraged by Jim, Brett and Stan VA7NF, the Field Day Committee decided that operating QRP might put us in a better scoring position than our usual high power entry.
It took quite a lot of persuasion, but in the end, it was indeed to be QRP. Jim's specialty was consulting propagation predictions and other data to see what we might be able to do with just 5W. Hoo boy!! With some adjustment to our antenna lineup, he suggested that we could do very well indeed.
Did we? We sure did.
Shattered the Canadian record for all categories.
Out of 2,719 FD stations in the US and Canada in 2015, some with more than 10 transmitters and most running 100W, we ranked #91 with our 3 transmitters and 5W.
Altogether a VERY significant achievement which any club would be proud of.
Wouldn't have happened without Jim (or Brett)
It may not be common knowledge that Jim was responsible for a lot of improvements to the premier Amateur Radio Contesting software N1MM+. As an expert contester Jim was able to make suggestions to the programmers that made the software the contesting leader it is today.
Jim always had a liking for analytics, and he took the lead in creating 'Station Manager' training. This role is as important to getting the maximum number of points in a contest as it would be in a real emergency, ensuring that critical traffic got through. The role includes selecting the most useful bands according to shifting propagation, switching antennas, and to assigning operators, so he was constantly monitoring rates, band conditions/solar conditions, greyline, run rates, etc. Everything was graphed and plotted.
Jim was also an active member of ORCA DX and Contest Club, and of the BC DX Club.
As the BC coordinator for the Pacific Northwest Challenge, for many years he looked after the collection of scores for the inter-club contest trophy -- the Pacific Northwest Cup -- and was a frequent attendee at club meetings.
We will miss you, Jim.
Thank you for all that you taught me and others.
We were very fortunate to have had you as a member.
Now Jim is gone
Damn!
Rest in peace.
~ John VE7TI
April 18 has been declared World Amateur Radio Day. It was on that day in 1925 that the International Amateur Radio Union (IARU) was founded, during the International Radiotelegraph Conference in Paris. That is why radio radio amateurs worldwide celebrate this day with special activities every year.
The advocates of an International Amateur Radio Union were of the opinion that the shortwave spectrum that radio amateurs use to transmit and to receive, could unite people all over the world, something that was assumed impossible. Therefore, this unifying action was undertaken. In addition to protecting and preserving frequency spectrum for the radio amateur, the IARU also strives to protect the frequency spectrum of importance to other services. For radio amateurs, protection of our bands is of utmost importance, as shown through amateur response in countless emergencies and disasters worldwide.
Interest in amateur radio has only grown since those early days, with more than 3 million radio amateurs worldwide. Through this medium people from different countries and cultures could interact with each other and exchange ideas, long before there were facilities such as (mobile) phones, e-mail or social media.
And amateur radio is still popular because you don't need a mobile network or internet to communicate. This is especially important to those in remote areas, those with outdoor interests such as hikers, off-roaders and hunters, emergency preparedness, as a hobby, or as an entry to a new career path such as electronics and communications. The service is, and always has been completely infrastructure independent. Radio amateurs are especially important to maintain connections during disasters, in the event that regular communication channels are no longer available. For example, the Amateur Radio Service kept agencies in New York City in contact with each other after their command center was destroyed during the tragedy of 9/11.
Radio amateurs were the first to discover that the HF spectrum was not the wasteland that experts from those days branded it, but a tool that could support global communication. When the industry discovered that amateurs could successfully communicate worldwide on these shorter wavelengths, amateur radio was again in great danger of being pushed aside. This led to the creation of the IARU. At the International Radio Telegraph Convention of 1927, amateur radio assignments were made that are still recognized today: 160, 80, 40, 20 and 10 meters. In the course of the years, the IARU has also worked to give radio amateurs new bands at 136 kHz, 472 kHz, 5 MHz, 10 MHz, 18 MHz, 24 MHz and 50 MHz, and a regional European allocation at 70 MHz.
The 25 countries that formed the IARU in 1925 have now grown to more than 160 affiliated associations in three regions. IARU Region 1 includes Europe, Africa, the Middle East and North Asia. Region 2 includes North and South America and Region 3 includes Australia, New Zealand, the Pacific Islands and most of Asia. The International Telecommunication Union (ITU) has recognized the IARU as the representative of the interests of radio amateurs.
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IARU has member societies in countries shown in yellow |
All radio amateurs are invited to go on the air on World Amateur Radio Day to explore our hobby, to promote it to family and friends, and within their interests.
We offer our on-line courses about every 12-weeks. Further information is available at: https://bit.ly/SARCcourses
On Monday, April 18, 2022, Radio Amateurs of Canada is once again organizing a special on-air event to celebrate World Amateur Radio Day.
Every year on April 18, Radio Amateurs worldwide take to the airwaves in celebration of Amateur Radio and to commemorate the formation of the International Amateur Radio Union (IARU) on April 18, 1925. Radio Amateurs of Canada is once again holding a “Get on the Air on World Amateur Radio Day” special event in which we encourage as many Amateurs as possible to get on the air and contact as many RAC stations as possible.
Sources: https://nationaldaycalendar.com/international-amateur-radio-day-april-18/, https://1drv.ms/b/s!ApeN-l7qi2UFk3OAFuk8KTSq4Rti?e=LOohoE, and RAC “Get on the Air on World Amateur Radio Day” Special Event
~
More information needed? Click: https://bit.ly/SARCcourses
or use the QR code above
Back To Basics is a regular column in The Communicator Newsletter. Past issues are available at The Communicator Digital Edition: Amateur Radio Newsletter (ve7sar.blogspot.com)
B-005-11-1 If no load is attached to the secondary winding of a transformer, what is current in the primary winding called?
A. Magnetizing current
B. Direct current
C. Excitation current
D. Stabilizing current
A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. A varying current in one coil of the transformer produces a varying magnetic field, which in turn induces a varying electromotive force (emf) or "voltage" in a second coil. Power can be transferred between the two coils, without a metallic connection between the two circuits. Faraday's law of induction discovered in 1831 described this effect (See story Page 4). Transformers are used to increase or decrease the alternating voltages (AC) in electric power applications.
An ideal transformer is theoretical… lossless and perfectly coupled. There exists no lossless transformer though. Transformer energy losses are dominated by winding and core losses. Magnetic permeability of the core results in the most loss, often felt as heat.
One of the main reasons that we use alternating AC voltages and currents in our homes and workplace’s is that AC supplies can be easily generated at a convenient voltage, transformed (hence the name transformer) into much higher voltages and then distributed around the country using a national grid of pylons and cables over very long distances.
A varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core and a varying magnetic field impinging on the secondary winding. This varying magnetic field at the secondary winding induces a varying EMF or voltage in the secondary winding due to electromagnetic induction. The primary and secondary windings are wrapped around a core of high magnetic permeability so that all of the magnetic flux passes through both the primary and secondary windings. With an AC voltage source connected to the primary winding and load connected to the secondary winding, the transformer currents flow in the direction indicated in the diagram below.
According to Faraday's law, since the same magnetic flux passes through both the primary and secondary windings in an ideal transformer, a voltage is induced in each winding proportional to its number of windings. This is determined by the equation:
When connected to a source of AC power, current flows through the primary winding of a power transformer even when no loads are connected to the secondary winding. The primary winding remains an inductor and lets some AC current through despite its reactance. This minimal current is called "Magnetizing Current" Also known as the “Exciting Current”. This current establishes the magnetic field in the core and furnishes energy for the no-load power losses in the core.
Therefore, the answer to our question is:
A. Magnetizing Current.
~ 73, John VE7TI
Manna@80! Operations Manna and Chowhound were lifesaving food drops to Northwest Holland 80 years ago, just prior to the end of World War T...