Posts Tagged ‘Surrey Amateur Radio’

A video about ARDF (Radio Orienteering)

Whether you call it Amateur Radio Direction Finding (ARDF), Radio Orienteering, Fox or Bunny Hunting

The feature speaker at our May 2024 meeting was Robert Frey WA6EZV. Robert spoke on ARDF - Radio Orienteering - Fox (or Bunny) Hunting. Robert was first licensed in 1968, and his interests include DX  and ARDF, as an on-foot foxhunter, for over 20 yrs. He was member of the US ARDF National Team in 2000, 02, 04, and 06 competing in China, Bulgaria, the Czech Republic and South Korea.

The presentation was recorded via Zoom so please excuse the video quality which is less than our usual presentations.

Robert Frey WA6EZV

We have documented some of our own SARC  Foxhunts in years past, including this locally developed 80m fox receiver:


and



~ John VE7TI


Special Event Station TM80DDAY

Commemorating the 80th anniversary of
the Allied assault on Normandy beaches

From June 4 to 9, 2024, a number of crew members of the Plusscouts PA3EFR/J and other Radio Scouters will be traveling to Normandy (Omaha Beach) to support the international activities of the commemoration services around 80 years of D-DAY. 

Operators of this call are the operators of the PA3EFR/J-crew, a specialist group of Scouters, members of Scouting Netherlands through the national Fellowship called Plusscouts. In addition, we have invited some distinguished guests to join our team. This crew primarily brings TDOTA and JOTA to Scouting groups that are eager to get involved in the annual global Radio Scouting activities. Additional information on this years crew can be found on the Plusscouts Website. The station is valid for 2 points in the Dutch Radio Scouting Award scheme.

The good news is that we will be hosted again by the D-Day Museum at Omaha Beach. A radio shack in the backyard of the museum will be part of our radio station and associated radio scouting activities.



QSL cards will be sent out after the event. 


Some specific Radio details:

Radio waves (+- QRM)

1.882 MHz LSB

3.682 MHz LSB

7.182 MHz LSB

14.182 MHz USB

21.182 MHz USB

28.482 MHz USB

DMR TalkGroup 907 - JOTA


We join our fellow Amateur Radio Operators in remembering the brave souls who fought for the liberation of Europe. 

Please help to commemorate this historic event by attempting a contact during the period indicated.


~ Sander PD9HIX
   John VE7TI

The May-June 2024 SARC Communicator Journal

Heading into summer...

With another big issue. The May-June 2024 Communicator, digital periodical of Surrey Amateur Radio Communications is now available for viewing or download.

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:  



Download the Communicator May-June 2024

Previous Communicator issues are at:

Search for past Communicator issues

and a full index is HERE.  

As always, thank you to our contributors, and your feedback is always welcome. 

The deadline for the next edition is June 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 [email protected]

73,

John VE7TI
'The Communicator' Editor






Commemorating the RCAF Centennial

The Royal Canadian Air Force celebrates 100 years of service and Amateur Radio marks the occasion with special event stations

Surrey, BC – The Royal Canadian Air Force (RCAF) is celebrating 100 years of service this April, marking a significant milestone in Canada’s military history. This centennial event offers a unique opportunity to honour the RCAF’s rich heritage, recognize its dedicated personnel, and generate enthusiasm for its promising future.

Throughout 2024, the RCAF will be showcased in a past, present, and future context, emphasizing its contributions to national safety and security, international peace, and global stability. The RCAF 2024 Team is curating a year-long program that includes international, national, and regional events. These events include the RCAF Run, RCAF Gala, Legends of the Sky, and participation of allied air demonstration teams in Air Shows across Canada. The program also includes initiatives to inspire future generations of Canadians through Science, Technology, Engineering  and Mathematics (STEM) activities.


To commemorate this occasion, Amateur Radio operators across Canada and beyond are invited to participate in a month-long event. They will have the opportunity to make contacts around the world on all amateur radio bands and modes using special event RCAF callsigns. These callsigns have been granted to provincial amateur radio groups specifically for this event. In British Columbia,
Surrey Amateur Radio Communications is the proud sponsor for VE7RCAF. This callsign will be available for use by all British Columbia ISED certified operators by booking time slots during April 2024.

We're hoping to have all bands and modes worked, including GOTA, POTA, and whatever else you can activate. If you are a VE7 or VA7, you can reserve a time slot. Go to the direct calendar link which is now live at: https://bit.ly/VE7RCAF and look for April 2024. The operating rules are at: https://drive.google.com/file/d/1_fkPdYJ7DDDSLRVGY6822hJ_gd0nEfy6/view?usp=drive_link. Please use your own callsign as the operator, but VE7RCAF as the station callsign for the log.

The VE7RCAF and several other provincial QRZ pages are also active now. QSL cards and awards will be available to commemorate contacts, and special recognition will be provided to those who contact all the RCAF special event stations across Canada during the month.

The RCAF Centennial is more than a celebration; it’s an opportunity to showcase Air Force personnel and their accomplishments, demonstrate air and space power, enhance the reputation of the RCAF, and proudly honour its distinguished history and heritage.

For more information on the RCAF 2024 Centennial, please visit the official website at RCAF 2024 Centennial: https://rcaf2024arc.ca/

Contact Information: [email protected]

~ VE7SAR



Getting to know GNURadio


Make a working receiver and more on your computer


At our January 2024 monthly general meeting (held via Zoom) Kevin McQuiggin VE7ZD/Kn7Q presented on GNURadio,

What is this GNU?

Aside from the wild beasts of Africa, GNURadio is an open-source software toolkit that provides signal processing blocks to implement software-defined radios (SDRs) and other digital signal processing systems. It allows users to design, simulate, and deploy radio systems in software, enabling the development of a wide range of radio communication applications.

Here are some key aspects of GNU Radio:

Software-Defined Radio (SDR): GNU Radio is widely used in the field of SDR, where radio functionality is implemented in software rather than hardware. This provides flexibility, allowing users to modify and experiment with radio protocols, waveforms, and processing algorithms.

Signal Processing Blocks: GNU Radio provides a collection of signal processing blocks that users can connect to create custom signal flow graphs. These blocks perform functions like modulation, demodulation, filtering, frequency shifting, and more. Users can combine these blocks to create complex radio systems.

Wide Range of Applications: GNU Radio can be used to develop a variety of applications, including but not limited to:

  • Communication Systems: Design and implement various communication protocols, such as AM, FM, SSB, LTE, Wi-Fi, etc.
  • Radar Systems: Create radar signal processing chains for applications like target detection and tracking.
  • Radio Astronomy: Process and analyze radio signals from space to study celestial objects.
  • Wireless Sensor Networks: Implement communication protocols for distributed sensor networks.

Extensibility and Customization: Users can extend GNU Radio by creating their own signal processing blocks, allowing for customization and the integration of specialized functionality.

Graphical User Interface (GNU Radio Companion): GNU Radio comes with a graphical tool called GNU Radio Companion (GRC), which allows users to visually design signal processing flow graphs. GRC simplifies the creation of complex radio systems by providing a drag-and-drop interface for connecting signal processing blocks.

Active Community: GNU Radio has a vibrant and active user community that contributes to its development. This community-driven approach results in continuous improvement, updates, and the sharing of knowledge and resources.

GNU Radio is widely used in academia, research, and industry for prototyping, experimenting, and implementing various radio communication systems. It plays a crucial role in advancing the field of software-defined radio and empowering individuals and organizations to explore and innovate in the domain of wireless communications.

You can watch Kevin's presentation on YouTube;


Kevin has included several links at the end of his presentation


Further Information:

In September 2023 Our Communicator journal included an excellent article by Kevin titled: "The  “What’s It?” Of WSPR" that touched on many of the same principles as GNURadio. 

Another of Kevin's articles, titled: "Introduction to Digital Radio" was published in our January 2024 edition. Both of these will provide excellent supporting information for Kevin's GNURadio presentation.

 
~


Restoring a rusty old tower (revisited)

Like being given a 'free' dog...

A BIG Project!

(from The Communicator - August 2013)

Three years ago I received a free tower and rotator. I’ll write about the rotator in another instalment but I’ve since discovered that some ‘free’ ham gear is like being given a free dog… you have to be aware of the hidden costs.

I had never had a tower but always wanted one. I’d been satisfied with my Carolina Windom, an off-centre fed dipole at 25 feet off the ground, that let me use most HF bands right up to 80m. It served me well, and still does but greater involvement in contesting and the desire to move up to a more directional antenna encouraged me to make the move.

Fortunately I have a wife who is also a ham, though not particularly active, but she knows the thrill I get when working a new country or breaking through a pile-up. She was supportive in my quest. Coincidentally I also had to replace the deck on our 30 year-old house. That provided another incentive to get the project started and find the right location. Our old laundry line was accessible from the deck at a corner of the house. The new deck, with glass panels around it would no longer allow this so the new tower would have to do double-duty as the anchor for the clothesline as well. I decided that it would be a light-duty tower as I didn’t have the space for a full-size tower, and I wanted to keep peace with my neighbours.

I spread the word among my fellow club members that I was looking. Pretty soon an offer came in of five ten-foot sections of light duty tower. I picked them up and it was immediately evident that some work would be needed before they would be safe and usable. Thick rust had eaten though much off the galvanized surface. Several of the cross-member welds had broken and one section was noticeably bent. I knew my wife wouldn’t be pleased if I attempted to place that within view.

Over the next several days I spent time washing down my new acquisition, which had evidently spent time behind someone’s shed, judging by the weeds, caked mud and dead critters in and outside the tubing. I also spent some Internet time researching whether I could revitalize this tower and how to go about it.



My daughter-in-law manages a paint store and was able to provide me with some technical advice on surface preparation and coatings. I knew I would have to paint the sections for my wife to accept them right outside her kitchen window. Colour would also be a factor.

I bought two brass wire wheels and some emery paper and set to work to clean off as much loose rust as I could with my power drill. It worked well and a day later I was done. Based on my Internet findings, and helpful reviews by previous users, I tried three products to tackle the remaining rust. From left to right on the adjoining photo they were Permatex brand ‘Rust Dissolving Gel’, ‘Evapo-Rust’ by Rust-stop Canada, and Rust Check brand ‘Rust Converter’. All were applied according to the provided directions and they performed their intended function. The gel, being thicker, clung to the parts better but was much slower and required a lot of re-coating to keep working. The other two products were thinner and more difficult to keep in place, but they produced faster results. If these were small pieces that could be submerged it would be no contest, but keeping to a short section at a time and using a paint brush to keep the area wet with solution clearly showed the Evapo-Rust product to be the most suitable, and the fastest. It also appears to be the most environmentally friendly of the three, though I wouldn't recommend doing this job on your lawn, as I started to do. Yes, the grass did eventually grow back.



The surface was now free of rust and, after another scrub, was ready for inspection. I looked closely at each crosstie and at every weld. Suspicious ones were marked. Several were obviously cracked or already split. With the assistance of Fred Orsetti VE7IO, the welds were repaired. I was ready for paint!


I would have used an oil based primer and top-coat but my expert advised me against it and she was correct. According to the product sheets for such coatings, it is not recommended that you use an oil based product on galvanized surfaces. The paint will release and peel off after a time—and I didn’t fancy the thought of doing this again in a couple of years. There are special coatings available in a spray can specifically for galvanized metal but they are quite expensive with small coverage, exacerbated by the necessity to get inside and out and into all the nooks and crannies around the welds. I decided a brush was the better applicator for that job.

We, (read-in wife-approval mandatory) decided the least noticeable colour on our wooded lot would be a camouflage green. As a result of my ‘colour-Googling’ I had actually suggested a multi-colour camo paint scheme but that was vetoed as being too ‘military looking’, and so the appropriate latex primer and top-coat were tinted. It took exactly one litre each of primer and top coat to paint the five sections twice, with extra coatings on the welds. I used an air sprayer on the legs for the final coat.


Next came even tougher work. I had to remove a section of my cement patio to make the appropriate foundation and dig a big hole. There were brackets available that could be surface mounted but I’m a ‘belt and suspenders’ kind of guy and I wanted this thing in a block of concrete. If guys are not used, the tower manufacturer recommends fastening a section to the house as high up as possible, in my case that was just near the top of the 2nd section. I visited my local scrap yard and purchased some heavy-duty angle aluminium by the pound. I cut pieces to make an equilateral triangle and bolted one to the top plate of the house, running two arms to adjacent tower legs where they were secured by U-bolts. It’s steady as a rock. I used stainless steel hardware for all the section to section connectors in case I ever want (or have to) take it apart. That time is approaching as I have completed a rebuild of a rotator and HF Yagi that will go up in the spring.

It has now been two years plus and the tower shows no signs of either rust or paint failure. It was a lot of effort but I’m pleased I did it. Even with my Carolina Windom centred at the top of the tower, much higher than before, I’m getting much more activity across all the bands.



The sections above the roof blend in nicely with the trees. The final touch was to place flower baskets on the rungs at each level. We now refer to it as the ‘Tower of Flower’ and surprise… the neighbours even say it looks good.

 ~ John VE7TI



Restricted putting up an antenna?

 Hide it in your holiday lights!

For all their supposed benefits, homeowner’s associations (HOAs) have a reputation of quickly turning otherwise quaint neighborhoods into a sort of Stanford prison experiment, as those who get even the slightest amount of power often abuse it. Arbitrary rules and enforcement abound about house color, landscaping, parking, and if you’ve ever operated a radio, antennas. While the FCC (at least as far as the US is concerned) does say that HOAs aren’t permitted to restrict the use of antennas, if you don’t want to get on anyone’s bad side you’ll want to put up an antenna like this one which is disguised as a set of HOA-friendly holiday lights.

For this build, a long wire is hidden along with a strand of otherwise plain-looking lights. While this might seem straightforward at first, there are a few things that need to be changed on the lighting string in order to make both the antenna and the disguise work. First, the leads on each bulb were removed to to prevent any coupling from the antenna into the lighting string. Clipping the leads turns what is essentially a long wire that might resonate with the antenna’s frequency into many short sections of wire which won’t have this problem. This also solves the problem of accidentally illuminating any bulbs when transmitting, as the RF energy from the antenna could otherwise transfer into the lighting string and draw attention from the aforementioned HOA.

Tests of this antenna seemed to show surprising promise while it was on the ground, but when the string and antenna was attached to the roof fascia the performance dropped slightly, presumably because of either the metal drip edge or the gutters. Still, the antenna’s creator [Bob] aka [HOA Ham] had excellent success with this, making clear contacts with other ham radio operators hundreds of miles away. We’ve shared another of [Bob]’s HOA-friendly builds below as well which hides the HF antenna in the roof’s ridge vent, and if you’re looking for other interesting antenna builds take a look at this one which uses a unique transformer to get wide-band performance out of an otherwise short HF antenna.

https://www.youtube.com/watch?v=4uG_D0bDGuI

Antenna Hidden In Holiday Lights Skirts HOA Rules | Hackaday

~ Hackaday




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