Support Your Parks

This event happens seasonally, on the 3rd full weekend of the month (Saturday & Sunday UTC). These are ‘activity weekends’ where the main purpose is to get out in the parks, and have as much fun as possible.

• Winter – 3rd Full Weekend of January. January 18-19, 2025
• Spring – 3rd Full Weekend of April. April 19-20, 2025
• Summer – 3rd Full Weekend of July. July 19-20, 2025
• Autumn – 3rd Full Weekend of October. October 19-20, 2024

Hope to get you in my Logs during the upcoming event….

73bob

I guess I learned a few things about my POTA setup and a few changes that need to be made.

First, these battery packs I am currently using don't last long at all. I've decided to purchase another of the small blue lithium packs like I use with the KX3. The only problem there is that I will have to build an adapter cable as they come with a 3.5mm plug, while the QMX uses a 2.1mm plug. I have plenty of 2.1mm plugs and I have an old battery that bulged and is no longer usable. I'll scavenge the 3.5mm charging socket off of that, solder on a 2.1mm plug and I'll have the adapter cable I'll need.

Second, I'm not thrilled with the paddle I had recently purchased.  I'm having a hard time adjusting it to the feel that I want, and as I was putting it back into the QMX bag yesterday after the Kring Point activation, a small nut dropped out of it and landed on the picnic tabel - not good. I still have a Whiterook single lever paddle kicking around somewhere and I also have the Bulldog Clip key. I can use either one of those. My American Morse DCP paddle will remain exclusively with the KX3.

Lastly, I have not fallen in love with the QMX to the point to replace my KX3 with it. For POTA activations, it's great because you generally find a clear frequency, call "CQ POTA" and don't move around too much. The KX3 is way more easier to tune. For general operating, and for hunting and pouncing in Sprints the KX3 is the way to go. Plus the KX3 gives me access to bands that the QMX does not. The QMX will be my "in the car, operate at the spur of a moment" rig. The KX3 will remain the weapon of choice for serious operating. 

72 de Larry W2LJ

QRP - When you care to send the very least!

Support Your Parks

This event happens seasonally, on the 3rd full weekend of the month (Saturday & Sunday UTC). These are ‘activity weekends’ where the main purpose is to get out in the parks, and have as much fun as possible.

• Winter – 3rd Full Weekend of January. January 18-19, 2025
• Spring – 3rd Full Weekend of April. April 19-20, 2025
• Summer – 3rd Full Weekend of July. July 19-20, 2025
• Autumn – 3rd Full Weekend of October. October 19-20, 2024

Hope to get you in my Logs during the upcoming event….

73bob

Yesterday was a rainy day, and Marianne and I vegged out for most of the day. The skies started clearing out in the late afternoon:

And we were rewarded with yet another beautiful sunset a few hours later:

This morning dawned sunny, bright and a tad on the chilly side. After breakfast and a few stops, Marianne and I headed out to Kring Point State Park, US-2091 for the second activation of our wedding anniversary getaway.

This time, I did not bring the AlexLoop along, only the Elecraft AX1. I was impressed by its performance on Tuesday and I was not to be disappointed this time, either!

Here are some photos that Marianne took of me doing the POTA thing:

And here are some photos that I took of the setup:

We arrived at the park at about 11:00 (15:00 UTC) and stopped at the Park Ranger booth only to be told that the picnic area was closed for renovation and construction, but that we were free to drive around and look at the park. That's when Marianne noticed quite a few vacant campsites that sure enough had picnic tables! So we stopped at campsite #12 and I headed off to the picnic bench while Marianne did some exploring,

I was set up by15:25 UTC, spotted myself on the POTA app and after calling CQ POTA on 14.062 MHz, I was immediately greeted by Hunters. I didn't want to stay too long as today is actually our anniversary and I didn't think it was polite and proper for Marianne to be bored out of her skull.

I quickly racked up another 14 QSOs in just 32 minutes and I pulled the plug when my batteries started going wonky. More about that in a minute. QSOs were made with New Jersey (NY to NJ on 20 Meters - strange!), WI, a Park to Park with WA9LEY at US-7256 in IL, SC, CA, GA, OH, VA, NC and AR.

The performance from this little antenna just blows my mind. As Craig WB3GCK said to me, "It defies all logic.", but there you have it, the proof is in the pudding. The AX1 will be my go to whenever I activate picnic table portable, The RBN map wasn't as impressive as Tuesday's but the snr figures were very nice! There was not a single skimmer that picked me up with a single digit snr report.

Regarding the batteries. I made sure they were fully charged and they did not last at all. That's probably due to the fact that they've been sitting in the shack for years without being used. I'll have to go to eBay to pick up some fresh ones or perhaps something else that will last a bit longer, but is still small enough to fit in my QMX bag.

Thanks to all the Hunters who worked me this week! My activations were not long or filled with triple digit QSO numbers, but they are valid activations and I had a lot of fun!

72 de Larry W2LJ

QRP - When you care to send the very least!

Maybe it is the magic of a new month, or perhaps the cooler days, but today felt like an excellent day for an activation.  Silver Springs park is just a few miles from my home, and has a couple of nice spots to park near the pond.

With a light mist falling, I was on the air just before 4 PM local time.  I used my KH1 QRP rig, which puts out about 4 watts.  less than a half-hour later I had 14 contacts in the log.  The skies really opened up right as I was putting the antenna away (a mag-mounted 17′ quarter wave vertical).

Thanks to all the hunters who helped out!

Activation of Silver Springs Park US-10547 using a Elecraft KH1 handheld QRP rig (4 watts). A 17-foot quarter-wave vertical on a mag mount was used. HAMRS was used to log the contacts.

During the summer months, Bill Brown K4NYM, wasn’t on nearly as often as before – perhaps avoiding the heat, or dodging the many storms that Florida has endured.  Even so, Bill and I worked each other 500 times.  100 of those contacts were at a single park, Florida Trail US-4559.

It was a great time being back in Ottawa, visiting with friends from my old neighborhood and also spoiling my Daughters two cats.

However on the “Radio side” of things …. not so good

The plans were that I would be able (weather permitting) continue to control my hour on the Trans Provincial Net while away. It seemed that “Mother Nature” had different ideas. Most days rain or the threat of rain kept me from heading over to the park.

Above pic showing where the park was and the route I took

As I mentioned in a previous post…. there was a local (non-POTA) park within walking distance to operate from. It was a local sports field and had some bleachers for when the crowds came for Junior Soccer/Football and or Rugby…

Below pic showing how I set up at the park

Although the operating position was excellent there was NO PROTECTION from the elements which in my case meant rain.

I was able to wrap my MFJ mast to one of the bleachers and stretch the end of the EFHW antenna to the other bleacher and it did work like a charm. Signal reports were great considering I was running 50w into the antenna

So for 1 out of a potential 5 operating days it was fun and dry. Walking home with the gear safely packed in the backpack “Mother Nature” paid a short visit.

I also managed to activate CA1515 and CA1516 using my Xiegu X5105 along with a 29 foot wire (supported by the same mast mentioned earlier) with a 9:1 unun, a 17 foot counterpoise with a choke on the radio end of the coax. Jose VA3PCJ was nice enough to offer me a ride there and back. I activated the parks using SSB and VA3PCJ activated the same parks using CW and his KX3.

For Jose’s version of the park activation click HERE

I am expecting to be returning to Ottawa in Mid-January 2025 for another visit with my GrandKits and like last years winter visit there will be a car to keep me warm and dry.

73bob

It was a great time being back in Ottawa, visiting with friends from my old neighborhood and also spoiling my Daughters two cats.

However on the “Radio side” of things …. not so good

The plans were that I would be able (weather permitting) continue to control my hour on the Trans Provincial Net while away. It seemed that “Mother Nature” had different ideas. Most days rain or the threat of rain kept me from heading over to the park.

Above pic showing where the park was and the route I took

As I mentioned in a previous post…. there was a local (non-POTA) park within walking distance to operate from. It was a local sports field and had some bleachers for when the crowds came for Junior Soccer/Football and or Rugby…

Below pic showing how I set up at the park

Although the operating position was excellent there was NO PROTECTION from the elements which in my case meant rain.

I was able to wrap my MFJ mast to one of the bleachers and stretch the end of the EFHW antenna to the other bleacher and it did work like a charm. Signal reports were great considering I was running 50w into the antenna

So for 1 out of a potential 5 operating days it was fun and dry. Walking home with the gear safely packed in the backpack “Mother Nature” paid a short visit.

I also managed to activate CA1515 and CA1516 using my Xiegu X5105 along with a 29 foot wire (supported by the same mast mentioned earlier) with a 9:1 unun, a 17 foot counterpoise with a choke on the radio end of the coax. Jose VA3PCJ was nice enough to offer me a ride there and back. I activated the parks using SSB and VA3PCJ activated the same parks using CW and his KX3.

For Jose’s version of the park activation click HERE

I am expecting to be returning to Ottawa in Mid-January 2025 for another visit with my GrandKits and like last years winter visit there will be a car to keep me warm and dry.

73bob

Although I bought my little (tr)uSDX transceiver two years ago, it has only seen sporadic use. Other than an occasional contact or two, it has been mostly relegated to the shelf. I figured it was about time to put it to serious use in a POTA/WWFF activation. 

I made a return visit to Norristown Farm Park (US-4363, KFF-4363) for another activation. It was raining on and off this morning here in southeastern Pennsylvania, so I pretty much had the place to myself. 

I set up the (tr)uSDX with my Elecraft T1 tuner in the cab of my truck. I used three 18650 Li-ion batteries power the radio. As usual, I went with my 12-foot whip and homebrew loading coil on the back of the truck.

I’m getting a little better at navigating the (tr)uSDX’s menus and using the controls. There are a lot of functions covered by three controls. To refresh my memory, I used the rig last night with my rain gutter “antenna” to make a couple of contacts. I also brought along a cheat sheet today, which I didn’t need.

Just for the fun of it, I started off using my little N6ARA TinyPaddles. They match the orange radio, so why not. Unfortunately, I had some issues with them, so I switched over to my Palm Mini paddles. I have to tweak the contact spacing on the N6ARA paddles. 

Starting out on 40M, the signals were strong and plentiful. It only took me about 11 minutes to log my first 10 contacts. When things slowed down on 40M, I made a few contacts each on 30M and 20M. After 45 minutes, I had 21 contacts in the log with one park-to-park QSO.

The (tr)uSDX is an incredible little rig. They packed an awful lot of features into a tiny package, but it’s not really a high-performance radio. I have to admit it wasn’t the most pleasant rig to listen to; there were some pops and clicks in the sidetone when keying. It could have been the earbuds I was using. I also need to go back through the menu settings to make sure I haven’t missed something. Looking at my RBN spots, I could see I need to tweak the frequency calibration a bit. It’s transmitting a little lower than the displayed frequency. Having said all that, I can’t be too critical of radio at this price point.

In the end, though, the little rig got the job done today. Not bad for a five-band, multi-mode radio that costs less than $140 assembled. 

72, Craig WB3GCK

I don’t know that I’d call Clay Mitchell, W8JNZ (SK), my mentor exactly, but I did look up to him, both as a ham and as a person. I’ll always remember one thing that he told me. “Dan,” he said, “one of the best ways to learn about something is to ‘tinker’ with it.” He’d gotten this bit of advice from Dr. Richard Crane, W8CWN, who taught physics at the University of Michigan and was a a well-known science educator and great tinkerer.

I applied this bit of wisdom to the antenna that I use for portable ops. It’s nothing fancy—just a 66-ft. doublet—but by tinkering with it over the years, it’s a much better antenna than it was when I first built it. 

It started with a KX1

It all started about 20 years ago when I decided that I wanted to operate portable and bought and built an Elecraft KX-1. Out of the box, the KX1 covers 40 meters and 20 meters, and you can buy an option to add 80 meters and 30 meters to the radio. I also purchased and built the optional automatic antenna tuner.

The user manual for the KX1 antenna tuner suggested using a wire antenna of 24 – 28 feet and one or more radials of at least 1/8-wavelength. It also suggests connecting these directly to the radio without a feed line. I cut four, 24-ft. lengths of wire from a spool of wire-wrap wire that I had scavenged from the dumpster of one of my employers, purchased a BNC-binding post adapter, connected the driven element to the red binding post and the three radials to the black binding post. 

The tuner found a match for this antenna, but I was never really thrilled with the performance. I made some contacts, but with only 4 watts output, most of those contacts were a struggle. I struggled with this setup for a couple of years, but since I was really enjoying portable operation, I decided that some tinkering was in order.  

A new antenna is born

In 2007, my 66-ft. doublet was born. Our club here in Ann Arbor, MI, ARROW, conducts mini-Field Days the we call AMP Team meetings every month. (AMP is short for ARROW Mobile and Portable.) We haul all kinds of radio gear out to a park and set up and operate. The gear you’ll find at one of these events includes HF, VHF, UHF, and even some microwave gear. Some club members, for example, are experimenting with AREDN mesh networking, and these meetings are a good place to test out their nodes without having to worry if their node’s antenna is line-of-sight with another node.

As I was contemplating what to use for an antenna for one of these outings, I scanned the shelves in my shack for antenna-making materials. I still had a fair amount of wire-wrap wire that I could use for the antenna itself, but what to use for feed line? When my eyes lit on a spool of twisted-pair wire, I thought why not give that a try? I cut two 33-ft. lengths of wire-wrap wire for the antenna elements and one 33-ft. length of twisted-pair wire to use as feed line. 

As this was going to be an experimental antenna, I didn’t care too much how kludgey the thing looked. For the center insulator, I dug a ceramic dog bone insulator out of my box of antenna parts. To connect the feed line to the antenna elements, I used a couple of small wire nuts.

Cutting a 33-ft. length of wire for the feed line was actually a mistake. I figured that if I made the twisted pair feed line a half-wavelength long, then I’d have a relatively low impedance at the rig. Instead, in my haste, I cut it too short. 33 feet is only a quarter wavelength at 40 meters, which theoretically should have yielded a high impedance at the antenna input. In practice, however, the KX-1 managed to tune that antenna and feed line on 40 meters and 20 meters just fine. That just goes to show how much I know.

To hang up the antenna, I made a small loop at the end of each wire, and to that I tied some mason twine. I threw that twine up into a tree using a weighted tennis ball, and pulled up the antenna. One problem with this approach is that I was never able to get the antenna up all that high. Sometimes the antenna was less than 15 feet off the ground.

Another problem is that it took a long time to do this. It takes time to get two lines up into trees, raise the antenna, then tie off the lines. Not to mention that you need two trees relative close to one another. Sometimes, I would set up this antenna as an inverted-V, but I still had to find an appropriate tree for this.

Enter the KX3

In 2015, I bought a used KX3. Being a KX1 user, I had subscribed to the Elecraft-KX mailing list, and when someone offered to sell a KX3 with antenna tuner for about $1,200, I jumped on it. At first, I had visions of outfitting with with a PX3 band scope and some kind of amplifier to make a base station out of it, but when I found a good deal on a Flex 6400, I decided against that approach. The KX3 would be devoted to portable operation.

Because the KX3 antenna tuner has a wider range than the KX1 antenna tuner, I wasn’t anticipating any problems with it tuning the doublet. And, in fact, that was the case. The KX3 easily tunes the doublet on all bands between 40 meters and 10 meters.

POTA improvements

Improvements to the antenna accelerated once I started operating Parks on the Air (POTA). One of the first improvements was to purchase a 10-meter, telescoping, Spiderbeam fiberglass mast. With the Spiderbeam mast, I no longer have to throw lines up into trees. I slide a small eyelet into the top section of the telescoping mast and attach the center insulator of the antenna to the eyelet. I extend the mast and operate the doublet as an inverted V. No trees needed.

To anchor the telescoping mast, I pound three garden stakes into the ground at 120-degree intervals around the mast, then put a strap around the stakes and mast to hold the mast  upright. This arrangement is much easier to set up than others that I’ve seen that use ropes and tent stakes, and it is very stable. It’s certainly stable enough for a two- or three-hour POTA activation.

To anchor the elements, I use two-pound exercise weights that I bought for a buck each at a local thrift shop. Using the weights, it’s easy to extend the elements to whatever length I need quickly. Overall, setting up the antenna is very quick. I can be on the air within 20 minutes of arriving at a park.

The next improvement that I thought I’d make is to find a center insulator that would provide better strain relief for the feed line. Searching the internet, I found a 3D-printed center insulator by an eBay seller who calls himself thecrazyham. He didn’t have anything designed for a twisted-pair feed line, but I guessed that a center insulator designed for 300 Ω twinlead would work just fine. It did work just fine, and as a bonus, it only cost five dollars!

After acquiring the new center insulator, my friend, Rick, K8BMA gave me some 26-ga. Poly-STEALTH antenna wire. I cut two,  33-ft. lengths and connected them to the feed line with wire nuts again. I hadn’t had any trouble with the wire-wrap wire I was using, but this wire was made with antennas in mind. It’s really first-rate stuff. I don’t think it works any better than the wire-wrap wire, but it coils up neatly and fits nicely into the small toolbox I use to carry around POTA station. 

A “real” feed line

Whenever I was asked about my POTA antenna, I would brag about the twisted-pair feed line. I was rather proud that I thought to use twisted-pair wire as a feed line, and that it actually worked. But, a  couple of months ago, my friend Paul, KW1L, bought a Cobra antenna. Before putting it up at his house, he asked if we could take it on a POTA activation and try it out. I agreed, and one morning, we took it up to the Island Lake Recreation Area.

Band conditions were good that morning, but even so, it seemed like the antenna was performing at least a little better than my doublet. Paul said, “Well, sure, it’s because the Cobra antenna has a real feed line.”

So, I decided to try a “real feed line” on my doublet. It just so happened that I had a 100-ft. roll of  300 Ω twinlead that I purchased at a dollar store many years ago. I cut off a 35-ft. hunk of it, soldered it to the antenna elements, and put some banana plugs on the other end of it. After using this  antenna for a couple of months now, I feel that I have to swallow my pride a little and say that the antenna with the 300 Ω feed line does work a little better than it did with the twisted-pair feed line. I’m guessing that it’s because the twisted-pair feedline has a higher loss than the twinlead.

My latest improvement is to use a 4:1 balun between the feedline and the antenna tuner. Until just recently, I was connecting the feedline directly to the KX3 antenna tuner, but the fellow who sells Cobra antennas recommends using a 4:1 balun, so I thought that doing so might improve my antenna’s performance as well.

Several years ago, I purchased a couple of W1CG  current balun kits at a hamfest, and now was the time to build one. This is a really great kit, and if you ever see one at a hamfest or wherever, buy it. The New Jersey QRP Club that sponsored this kit is now defunct (despite the website still being online), and the kits are no longer available. (I’ve been thinking about kitting up some and selling them, but that’s  a discussion for another day.) The instruction manual is still available, though, and it’s not hard to find the parts. 

If you’re at all interested in baluns and how they work, you should download the instructions. They contain a great description of how baluns work and the difference between voltage baluns and current baluns.

At any rate, I built one of the kits, and have started to use the balun on my POTA activations. I can’t say for sure how much the balun has improved my results, but it certainly hasn’t hurt them, so I’m going to continue to use it. 

Tinkering gets results 

If you take away only one thing from this article, take away the idea that tinkering with something gets results. The antenna that I’m using today is basically the same antenna that I built 20 years ago, but the tweaks that I’ve made have significantly improved its performance and its ease of use.

One final note: I recognize that much of my success is due to the magic of the Elecraft antenna tuner. I have used this antenna with other antenna tuners, including the inexpensive Z-match tuners you can get from Ali Express or Amazon. It should also work well with the Emtech ZM-2 antenna tuner. If you purchase and tinker with this antenna and one of these tuners, please let me know how it works out for you.

For those of you who will be on the air this weekend, scratching your heads and thinking "What $$%*@! contest is this?", brought to you as a public service:

Contests (not much):

CQ Worldwide DX Contest, RTTY - https://www.cqwwrtty.com/

Maine QSO Party - http://www.ws1sm.com/MEQP.html

For those of you who like to chase Special Event Stations:

09/26/2024 | Triple Tree Fly-In

Sep 26-Sep 28, 1200Z-2359Z, W4F, Spartanburg, SC. Spartanburg Amateur radio club. 7.210 14.200. QSL. SPARC, Fly-in, 400 Glenwood Dr, Spartanburg, SC 29303. station to operate during operation of the fly-in. k4ii.org

09/28/2024 | SENARC 1936-2024 ANNIVERSARY

Sep 28-Sep 29, 1521Z-1519Z, W9WKP, Lincoln, NE. SOUTHEAST NEBRASKA AMATEUR RADIO CLUB. 7.265 7.285. Certificate & QSL. Charles Bennett, PO Box 67181, Lincoln, NE 68506. The SENARC (SENRC) will celebrate 88 years as a club started in 1936. G.C. Bennett, Auburn, NE, W9WKP was the first ARRL emergency coordinator for Nebraska. senebrradioclub@gmail.com

09/28/2024 | Volcano Days WV Oil and Gas History

Sep 28, 1400Z-2200Z, W8PAR, Parkersburg, WV. Parkersburg Amateur Radio Klub. CW 14.050 PH 14.250 CW 7.050 PH 7.200 FT8 on 20 & 40. Certificate & QSL. Jerry Wharton, 1722 20th St, Parkersburg, WV 26101. Relive an exciting chapter in WV history! www.w8par.org

09/29/2024 | Re-enactment of the First Trans-Global Two-Way Radio Communication

Sep 29-Oct 26, 0000Z-2359Z, GB2NZ, Many locations, UNITED KINGDOM. Radio Society of Great Britain and New Zealand Association of Radio Transmitters (Otago Branch). All bands and all modes depending on operator availability. QSL. See website, for, information, UNITED KINGDOM. www.gb2nz.com

For you POTA Hunters, at some point next week I hope to activate either, or perhaps both of these in Upstate NY -  Kring Point State Park US-2091 and Keewaydin State Park US-2088.  If the weather cooperates and I get the opportunity to activate, I'll post my activation to the POTA app and will perhaps spot myself on the DX Cluster if I get cell phone coverage up there. I scoped out both parks on the Web and it appears both feature picnic tables in their amenities lists. Operating from my vehicle is a last resort - I prefer to be out in the fresh air and sunshine.

I'll have my QMX, my AX1, my AlexLoop, my Buddistick and my EFRW to pick from, so antennas won't be a problem.

Tomorrow, the South Plainfield Police Dept. is hosting "National Afternoon Out" as National Night Out in August was a rainout. It is going to be held in Putnam Park which was recently renovated. This is the same park where we held Field Day from 2021 to 2023. I wish I could be there, but plans preclude it. Our Boro Council is going to make a presentation to SPARC, honoring the 10th Anniversary of our founding. As one of the founding members, I really hate missing this, but such is life.

72 de Larry W2LJ

QRP  - When you care to send the very least!

The Parks on the Air program really works hard to keep folks engaged.  One of the way they do this is by having an unbelievable array of different awards.  About a month ago, I earned my first “Eagles Nest Award”, for working a park in Florida 100 times.  Of course, this is because of Bill Brown K4NYM.  In fact I need to work him 4 more times to have an award for working him 500 times!

Thank you Parks on the Air!!!