Tag Archives: HF

Activities, Education and Training, Featured, General, Newsletter, On The Air

Why Would I Want To Be In A Contest?

As I sit here watching the N1FD teamwork the CQ Worldwide DX contest, it got me thinking about what contesting is really about and why we contest.

Let me try to answer the second question first. There are lots of different reasons to operate in contests. Many folks do this to work new countries, states, zones, islands, grids, etc. It seems that you can find a contest that is designed to create opportunities to work just about anything that you can think of on the bands. Others work contests to try to test out their stations and to improve their skills as operators. Of course, many folks compete to win the contest or to place better than they did the last time. Some may even compete to set a record.

Joe KB1RLC in the CQ Worldwide DX Ham Radio Contest
Joe KB1RLC in CQ Worldwide DX at AB1OC

Perhaps the best reason to contest is that it provides one of the best opportunities to be a better operator. You may say, aren’t contesters just QRM on the bands on weekends when we want to use them for other stuff? I can see why some feel this way. I wish that more amateurs who feel this way would take some time to listen more closely to what is going on during the contest.

There is nothing quite like listening to a skilled operator work a pileup from a rare place during a worldwide contest like CQ Worldwide DX. Such an operator will make 100’s of calls in a row. They will accurately get each caller’s information into their logs and the really great ones will also use their skills and energy to ensure that each of their callers gets the contest station’s information correct in their logs as well.

This requires great skill in many areas. First, you need to really learn to listen and to pick out weak and fading callers in the presence of a great deal of QRM. It’s often necessary to piece together a good callsign using several rounds of a QSO. Good contest operators know perhaps 500 or more of the most common calls used in their contest and this information helps them to recognize calls and avoid making errors. The great ones also know how to work with each caller to ensure that they get the correct information to complete the contact and that the other operator does the same.

Jamey, KC1ENX Operating in the CW Worldwide DX SSB Ham Radio Contest
Jamey, KC1ENX Operating in CW Worldwide DX SSB

I like to think of this as getting in the head of the other person during the QSO.  Did they get my call right or do I need to slow down and say my call again? Did I hear their callsign and exchange correctly or do I need to give them a chance to ask me to correct something for them? While I am doing all of this, I need to be as fast and efficient as possible. These skills take a great deal of practice to develop. You can get there with less time in the chair during contests if you take some time to listen and pay close attention to the great operators that you will hear during contests. First and foremost, great contesters are great listeners and they can accurately pick out call signs on the first try without making mistakes.

N1MM+ Logger Setup For Our Contest Operation
N1MM+ Logger Setup For CQ WW DX

What, you say that any operator will do great when they are sitting at a big contest station with a lot of power and big antennas? It is true that having a well-built station and good hardware and computers helps make contacts easier. Computers and modern software like N1MM+ also play an important role in making the mechanics of finding and making contacts accurately more efficient. The contest community makes their software available free of charge to everyone. I strongly encourage anyone who contests to set up and learn to use modern contest software. While these tools help, they are just like construction tools in the hands of a carpenter. The master carpenter can create a work of art with a hand saw, a hammer and some basic hand tools while an apprentice can struggle to get good results from the best shop and tools available.

Also, most contests are designed with categories to group contesters with their peers who have setups similar to theirs. Station hardware differences also do not account for the contester who goes to an island in the Caribbean with a 100W radio and a simple antenna and wins an award in a contest.

Julio, HI3A Competing in the WRTC Ham Radio Contest
Julio, HI3A Competing in WRTC

We also saw this clearly during the WRTC competition here in New England a few years ago. We had the best operators in the world competing using the exact same towers and similar antennas that we use for our annual Field Day operation and they made 2,000 or more contacts in a 24 hour period using 100W radios. Many of these operators did this while making almost no mistakes!

So what else makes a great contest operator besides working fast and efficiently to complete and log lots of contacts accurately? For one, these folks know a great deal about propagation and how to take the best advantage of the conditions at hand. They know when it’s time to run on 20m into Europe, when to look for Japan on 15m for those multiples, what time of day and segment in the contest to focus on contacts in the Caribbean and South America, etc. They learn when they need to change bands and when it’s time to work multipliers or tune the band that they are on with their second radio or VFO. They can quickly determine the band and propagation conditions on the contest weekend and adjust their strategy to take the best advantage of the conditions at hand.

A great operator also learns to make the best use of their station and antennas. They understand where their stations work well and they adapt their approach to a contest based upon this. They also spend lots of time looking at and comparing their performance from contest to contest and against other competitors in the same contests to see where they can improve.

So what if you don’t really want to win contests? Why would you bother with this? The most important reason is that contesting will make you a better operator. You’ll learn to hear that really weak DX and get them into your log accurately. When you get on the air, you’ll be an operator that others want to work because they know you will help them complete a contact that they want. You will find and work stations that most others will miss. In short, a bit of dedication to contesting will make you a great operator.

Bands and Modes Worked By N1FD (Noon On Sunday)
Bands and Modes Worked By N1FD (Noon On Sunday)

As the CQ Worldwide DX Contest weekend draws to a close, I’d also like to add that I am proud of the job that the operators in our club did at our station. Most of them had almost no DX contest experience before this weekend. They worked the contest hard and have made contacts to over 100 counties in about 40 hours of operating. They have all improved their skills greatly and I look forward to working all of them at any time.

73, and see you in the contest!

Fred, AB1OC

Antennas, Featured, General, Homebrewing, Newsletter

Moxons in the Attic (Part 1)

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A few months ago, I wrote an article on building a stealth antenna farm. Since I live in the land of CC&Rs, antennas must be “dual use” such as a vertical hidden inside a PVC flagpole, or low dipoles and inverted Vees hidden in trees. I spent many years as an avid contester and DX-chaser to appreciate the logic of stacked beams on towers to enhance the thrill of the hunt. Thanks to Layne, AE1N, I checked out the website of Jeff, AC0C (www.acoc.com) for some ideas of how to build a multi-band station in one’s attic without the condo association vigilantes running him out of town. Jeff spent countless hours crawling around his attic to construct multi-element antennas for 160 through 6 meters. Spurred on by Jeff’s success, I decided to explore the attic of my garage to see what I could do. As I described in the MAY Nashua ARC bulletin, I settled on building Moxon antennas for 15 and 17 meters.

An old adage about antenna building states that an antenna must be built-in lousy weather in order to work right. Thirty years in New Hampshire lent credence to this axiom as I spent many a cold, windy day on a tower doing antenna work. In Florida, a similar law applies: build an antenna in the summer months while sweating profusely rather than during the comfortable winter weather. Again this makes sense: DX and contesting fill up the winter months to have time to mess with antennas. It is also important to remember that, during such endeavors, you will become enamored with you antenna as you take breaks to warm your body (in NH) or drink a gallon of water (in FL), all the while cursing this law of antenna building.

But I’m getting ahead of myself. My garage attic is roughly 20 x 20 feet with an apex of about five feet that runs north-south. I had selected the Moxon design because a conventional 2-element beam would not fit in the space available. I elected to build a Moxon for 15 and 17 meters that would fit in the space available without having to encounter obstacles like the ventilation duct work. I was also fortunate in that my home is one of the older models that do not have foil-backed insulation inside the roof that creates a radiation-proof box. The joists junctions are reinforced with metal plates as part of hurricane building codes. My plan was to attach the wires to the roof trusses and stay away from these plates as much as possible to avoid interaction.

The 17-meter Moxon is a little over seven feet between elements while the 15-meter Moxon is about six feet between elements. I used a piece of half-inch PVC pipe as a template to mark the joists for the 17-meter antenna. The antenna is about 2.5 feet above the attic floor for a total height of eleven feet above the ground. I had modeled it at 13 feet so I figured it would be close enough. The 15-meter Moxon is about 15 inches above the 17-meter one. When viewed from the top, the antennas look like concentric rectangular loops.

Over the course of several weeks, I grunted, groaned and sweated my way back and forth measuring and installing the wires. I worked during the morning hours before I was soaked before 10:00 AM. I found myself wishing I could have my five-year-old grandson help me. He can stand upright and is plenty flexible to maneuver around the joists. While I did not have to worry about the obvious safety issue of working on a tower, I did at times feel I was a candidate for the NFL concussion protocol from bumping my head. I tried using my cycling helmet but it interfered with my headlamp. Another similarity to tower work is that I had to make N trips back and forth in the attic for stuff I forgot. This is, however, much more bearable that climbing up and down a tower to get what I forgot.

Figure 1 shows a view toward the south end of the attic. The two pieces of PVC form the element separators for the 15-meter Moxon (top wire) and the 17-meter Moxon (bottom wire).

Figure 1 – Moxon Element Separators, 15m (top) & 17m (bottom)
Figure 1 – Moxon Element Separators, 15m (top) & 17m (bottom)

Figure 2 shows the reflector elements for each antenna as secured to the joists, looking north through the attic. The white standoff fasteners are coax cable tie-downs that I found at the hardware store. Standard house wiring fasteners would have worked but they leave little room for pulling wires if I needed to make adjustments. (My first attempt was to use duct tape to hold the elements up. However, the heat soon made them droop.)

Figure 2 – Moxon Reflector Elements, 15 m (top) & 17m (bottom)
Figure 2 – Moxon Reflector Elements, 15 m (top) & 17m (bottom)

Figure 3 shows one corner of the director of each antenna looking east. The duct work to the left is part of the ventilation system while the open duct vents directly from the garage below. The yellow fence standoff on the upper antenna is the bend point for one end of the 15-meter director. Not visible to the left is a similar bend point for the 17-meter director.

Stealth Antenna - Looking East-from the Reflectors
Figure 3 – Looking East-from the Reflectors

Figure 4 shows the temporary feed points for each antenna.

Stealth Antenna – Feedpoint for 15m (top) & 17m (bottom)
Figure 4 – Feedpoint for 15m (top) & 17m (bottom)

The figures above show the project to date. I installed the 17-meter antenna first and measured its SWR performance with my analyzer. I found that it resonated beautifully at 16.7 MHz with a 1.1:1 SWR while bulging to 3.9:1 at 18.1 MHz. I shortened each element by a foot and ran measurements again, this time the resonant point moved up to 17.3 MHz (1.3:1 SWR) and the SWR at 18.1 MHz dropped to 2.7:1. I folded the elements back another four inches on each end and measured the response. I observed the SWR bottoming out at 1.5:1 at 18.1 MHz where I wanted to be. As a point of interest, I modeled a Moxon designed for 16.7 MHz and noticed the elements were about two feet longer than a Moxon designed for 18.1 MHz, close to the twenty inches I had to shorten the elements. Apparently, there is some interaction with the wiring that runs along the attic floor near the edges.

Armed with the satisfaction I was on the right track, I installed the 15-meter Moxon above the 17-meter antenna. I hooked up the analyzer and fired it up only to find to that its “resonant” point was a dismal 3.0:1 SWR at 22.9 MHz, rising to 3.9:1 at 21.1 MHz. This meant my antenna was too short. I went back to EZNEC, opened the standard dipole model and plugged in 22.9 MHz and found that its length was very close to the overall driven element for a Moxon designed for 21.1 MHz. I lengthened each element by five inches as a starting point to see what would happen. The result was no change in SWR at 22.9 MHz while dropping slightly to 3.6:1at 21.1 MHz. Hmm, looks like I need to get a little smarter about this.

Stay tuned for Part 2 to find out. (Don’t you hate that?)

Ed, K2TE

Activities, CW and QRP, Education and Training, General, Homebrewing

Upcoming Tech Night Suggestions Forum

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At our most recent Tech Night meeting on Sept 12, at the end of the meeting, Fred (AB1OC) asked Brian (AB1ZO) to list a few of the upcoming tech night events.

One such event would be to host a kit-building tech night. Plans are in the works to secure Pixie QRP kits (which run in cost from $3-$13) or some variant of this and assemble the kits during the allocated time. It’s expected that more experienced HAMs can mentor newbies in endeavors such as these.

Secondly, an informal poll was asked of members in attendance regarding the types of topics that would be of general interest. These included:

  • Low-band antenna discussion: Due to the decreasing sunspot activity, “40m is becoming the new 20m”. What options to HAMs have to get on the lower bands, particularly if you are real-estate limited?
  • Receiver vs Transmit antenna discussion — options for both
  • High-frequency terrain analysis (HFTA) in order to better understand propagation effects of one’s signal
  • Making sense of the influence of sunspot activity on amateur radio in general. Some energy, for example, could be dedicated to interpreting the sunspot GUI that appears on the website after login and understanding the science of the ionosphere.
  • Working more with test-equipment kits and how to use them. This may include oscilloscopes, spectrum and network analyzers, frequency counters, signal generators, building CW paddles/keyers, and soldering kits.
  • Using RTL-SDR dongles (or again some variant) and using them in small DIY projects that we could potentially complete in the allotted time.

I do want to say a few other things:

  1. Since our club is growing, and many new people are joining, I do want to stress that it is important that sometimes we “recycle” old Tech night topics in an effort to better educate our newer members. In this capacity, I would again hope that veteran members could help train younger ones. For example, I cannot solder to save my life. I would love some training during a surface-mounting tech night (since I couldn’t make the last one) and have someone experience show me the ropes.
  2. Many of you are working on interesting projects at home. No matter how small or large you think it is, I am 100% certain there are a group of people within the club who would like to hear what you have to say. So if you would like to present at Tech Night something you have been working on, please do not hesitate to email me at [email protected].
  3. I also want to solicit your feedback on this blog as well as my email for any other topics. The more suggestions we have the merrier! It’s important we adequately represent the interests of as many members of the group as we can.

In the coming weeks, I will start to construct a more concrete list of potential Tech Night topics, but help me — help you 🙂 Thanks for reading and see you on-the-air.

Best and 73,
Brian (AB1ZO)

Radio Amateurs Developing Skills Worldwide