Tag Archives: Keith (KY4KK)

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A welcome POTA layover with friends at Lee State Park in South Carolina

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On September 30, 2023, my uncle Reggie passed away at the age of 83. I was incredibly fond of him. His funeral was to take place in Georgetown, South Carolina on Tuesday, October 3rd.

The funeral time was confirmed on Sunday evening (Oct 1), so I made all of my travel plans that night. I decided to leave early Monday morning and drive to Myrtle Beach where I’d reserved a hotel room for one night. I’d then attend the funeral the following day and drive back to my home in the mountains. Round trip, this would amount to about 12 hours of driving.

This, of course, was a pretty somber reason to take a road trip–although it would be nice to spend time with my SC family. I wanted to make the most of my travels and fit in a little “radio therapy” along the way. I glanced over the POTA map for a park that might make for a nice break from travels.

Before hitting the sack Sunday evening, I remembered that many months ago Keith (KY4KK) told me to give him a heads-up anytime I planned to pass by Florence, SC. I knew that Florence would be a simple detour on my journey, so I reached out to Keith and asked if he and his POTA buddies Tommy (N4GS) and Steve (W4JM) might, by some chance, be available for a quick POTA activation. Of course, this was very late notice.

Keith wrote back and recommended that I activate Lee State Park–he and Tommy were both available but, unfortunately, Steve had other plans.

Monday morning, I hit the road and arrived at Lee State Park in the early afternoon.

Lee State Park (K-2905)

I pulled into the park driveway and was greeted by a number of Halloween displays. Evidently, the park staff loves decorating for holidays.

At first glance, this looks like a POTA activator that never never got their ten logged.

I pulled into the visitor’s center parking lot and immediately met Keith and Tommy.

After a quick greeting, Keith said, “Thomas, our job here is to get you on the air as smoothly as possible so you can continue your trip.”

Keith, KY4KK (left) Tommy, N4GS (right)

Herein lies what I love about amateur radio and POTA specifically: even though Keith, Tommy, and I had only just met in person, they were instant friends.

I must say, Lee State Park is the perfect POTA park; there are loads of tall trees, covered picnic areas, open spaces, ample parking, and ham-friendly staff. It just doesn’t get better than this!

We walked to a large covered picnic area and Keith suggested that we deploy his 40 meter EFHW antenna.

I agreed without hesitation!

Unlike me, Keith is adept at using a slingshot to deploy his antennas.

As I started setting up the radio, Keith aimed his slingshot and snagged a really high branch on the first go. This 40M EFHW was being deployed as a vertical!

I decided to bring along my Penntek TR-45L on this trip. I’m glad I did: it was ideal for this sort of POTA activation! Continue reading A welcome POTA layover with friends at Lee State Park in South Carolina →

Antennas, Articles, Comparisons, Digital Modes, Guest Posts, News, QRP

Guest Post: Extreme QRP–Testing the AX1 with WSPR and 20mW

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Many thanks to Keith (KY4KK) who shares the following report:

Extreme QRP – Testing the AX1 with WSPR and 20mW

by Keith (KY4KK)

Thomas, thanks for all of your activation videos related to the Elecraft AX1 antenna.  I ordered one the day you announced the package deal, and it arrived in less than a week.  I’ve activated a few parks with it already (20m SSB).  Like you and many others, I’m impressed.

I was very interested in Thomas Barris’ (DM1TBE) March 12 QRPer post using WSPR to test his POTA antennas in Germany.  Then I saw Bob’s (K7ZB) post about his ZachTek Flea with 300 milliwatts in CW mode.  To me, extreme QRP represents some of the magic of HAM radio.  I’d like to share one of my most recent WSPR experiments related to the AX1.

About a year ago, a friend (NG4S) loaned me his pair of WSPR transmitters and suggested that I explore building and comparing antennas. I’ve been hooked on antennas of all kinds and WSPR since then.

I began doing WSPR tests on the AX1 the day after it arrived.  With two transmitters set to the same frequency and power output, you can do direct comparisons between two antennas under identical propagation conditions.

I’ve already done a couple of comparisons between the AX1 and other commercial antennas.  But I think the test I just completed might be of particular interest because it pits the AX1 against an antenna I’ve seen you use many times – a 28.5’ end fed with a 28.5’ counterpoise.  I used 24 AWG silicone insulated wire. The end of the radiator was placed on a 19’5” telescoping fishing pole.  This is my preferred POTA mast when I can’t use a tall tree.

I spent some time trying to control other variables so that the only significant difference during the test would be the antennas themselves.

For example, the SOTA Beam WSPRLite Classic transmitters don’t have an ATU.  So, I had to make the antennas resonant on the 20-meter WSPR frequency of 14.097 MHz.  For the AX1, Thomas’ videos helped a lot.  I used a clip-on capacitance hat and adjusted the counterpoise to 15’ 2”.  This gave me an SWR of 1.17:1.  For the end fed, I tried the two UNUN’s I had available and settled on the 49:1, which got me the closest (2.2:1).  I then used a manual tuner to achieve an SWR of 1.29:1.

I also wanted to deal with the difference in power output between the two transmitters.  Although they’re identical, and both set to 20 milliwatts, there is no way to ensure both are actually producing that output level.  Based on tests by NG4S, one of the transmitters runs at 19 milliwatts.  The other actually outputs 27 milliwatts.  So, my plan was to run the test for 48 hours. At the end of 24 hours, I would switch the transmitters (and callsigns) so that both antennas would benefit (relatively equally) from one of the transmitters being stronger.

At the end of Day 1, I reviewed the data from the two transmitters on dxplorer.net/wspr.  The end fed averaged a 5.7 dB gain over the AX1 based on reports from receiving stations that spotted both transmitters in the same 10-minute block (simultaneous spots).

On Day 1, the stronger transmitter was on the end fed.  The maps below are from WSPR.rocks.

AX1 – Day 1

End Fed – Day 1

I was pretty impressed that the AX1 got into Europe and Africa on only .019 Watt!  I always have good luck with end feds, so was not too surprised to see this one perform well. Continue reading Guest Post: Extreme QRP–Testing the AX1 with WSPR and 20mW →