Activated The Great Smokey Mountain National Forest

Here is the after action report where I finally activated a park in North Carolina. The Great Smokey Mountain National Park is a well used park in the POTA network, but it was one that I had not yet activated in my travels.

This particular area is called the Cataloochee valley and there is a heard of elk in this area that I like to try to photograph in the fall. Well since I was here, had a radio and the elk were not very close either…why not POTA?!? I decided to activate this park the night before and gave myself a decent little window of time to get it done in as well since I wasn’t sure how the elk would be doing… I had remembered from the last time that cell service was nonexistent here so I scheduled the activation on the POTA site the night before just as a precaution. This is a pro tip, if you even think you are not gonna have internet, go ahead and schedule the activation and pay close attention to the time as it is UTC time on the website and don’t do like I did and get the time off by several hours because you chose the wrong time zone… I did this on another activation and the results are as you think.

I found this spot and setup the truck-tenna (a hamstick on a receiver hitch mount I made) and the Ten Tec Argonaut 5 for this activation to just get on the air as I wasn’t sure how long I would have with band conditions being not great lately, so I wanted to stack the odds in my favor as much as possible ahead of time. Well it worked… as you will see later.

Here is a sign that lets you know just how unpredictable wild animals can be… Elk are VERY large creatures so it is prudent to heed this warning… I also thought it was interesting that the park rangers have to put out these signs at all… I guess getting a selfie is more important than getting killed by a bull elk…who knows?

This is what i found on this day though. The whole heard was just chillin in the edge of the treeline, so it wasn’t too heart stopping of an event to photograph them on this day. It was fun to just sit and peer at them through the camera for a while though. I have a video on my YouTube channel that showed a few more photos as well as talks about the rest of the trip some more as well.

Back to the activation though… I ran the coax into the cab as it was kind of cool this morning so I wanted to stay warm while I operated and just ran the cable through the window and left it down a little while I did since it wasn’t raining. This 15’ coax is just long enough to reach in this configuration too, which is nice.

Here we have the operating position today. I just sat the Argonaut in the seat, added a common mode chock and hooked up the HamGadgets cw keyer and my N3ZN tiny paddle and I got on the air. Power for the radio is pulled straight off of the truck batteries if I operate from this location as I have a power cable ran to the cab from the battery with power poles on it just for this. The arm rest makes for a decent desk, but it could be better. At some point I plan to make a table top that sits on the arm rest and goes forward to the shifter and even has a leg that sits on the console to support it as well. This will probably be covered with some sort of cloth so it wont be so rough on the arms and will allow me to spread out the notebook, pen and key a little more.

I could tell that the scheduled activation on the POTA site was working as I almost immediately got a pile up once I went live on the air and the RBN picked me up. It is night and day different as to what you get with and without the reverse beacon network picking you up. One QSO of note here is the Canadian call on the first page. We had quite the QSO and spent a few minutes chatting about things before I got back to the activation and went to work on that. I am not one to shy away from a ragchew even though I wanted to work a bunch of contacts too, it is all about talking on the radio so I love all of it.

I had a steady stream of calls come in for a little over an hour. that is awesome! I love it when I am able to catch what I think is all the QSOs that are calling. The band was really strong today too as I was only using 15 watts and was able to get really good signal reports back from most everyone. It was a really stable day as well as it can also be seen in the log that the signal reports were steady and not sinusoidal. Sixty three contacts later I called QRT to go get some lunch and fuel for the truck before heading on to Ashville for the afternoon. If you are interested in the rest of the trip, I have a YouTube channel where I talk about the photography aspect more. Thanks for coming along and until next time, go get on the air!

72

WK4DS

Counterpoise testing during a POTA Activation

Today involved some experimentation as well as a POTA activation. I tested some changes to the radials I use on my hamstick system out of curiosity and came away with some interesting results. Read on to see the AAR and the results of this test.

Today was supposed to be a quick little activation and then I was going to do a few other things, but plans are made to be changed from what I can tell as the bands were doing well for me and I stayed longer than I planned. But then the sun can bring that full circle as you will see below.

The operating position today shown above, was on top of the hill at the frisbee golf course and on the bed cover of the truck. Turns out that was somewhat of a bad idea. It just got hotter as the day progressed and the sun quickly came over the door I was using to shade me. This is what ultimately caused me to go QRT when I did as I was having a decent run on 20 meters at the time. It was just plain hot, with the sun seemingly cooking my right ear while I was working ops. I did enjoy working several ops today I have seen in my log before plus some that I have not. I even got a Canadian which is always nice.

This is probably the best image of my 40m hamstick and mount I have ever gotten. With the sun in the right spot, the whole antenna lit up well enough for the camera to get it. The setup is not actually mobile as it requires a counter poise to get it to work it’s best, but wow… it worked really well today, especially well today actually for some reason. I can hear surprisingly well on these tiny HF antennas too. I own three different brands of hamsticks (covering 40, 30, 20, 17 and 15) and can not tell a difference in any of them as far as how well they work. They all just work really well.

These two photos tell a story about what was happening at the location today on 30 meters. When people talk about having RF noise at a location, this is what it looks like on a radio that doesn’t have a waterfall display. The photo above is what the noise floor looked like when the RF noise was not present and the bottom image is what it looked like when it started up. It also was not constant, but appeared to by cyclic in nature as it would spool up and would just be some sort of hash for about 20 seconds and then it would just go away for about 30 seconds maybe longer. I would be able to work one contact and then it would come back and if the hunters were not transmitting with an S9 signal, I couldn’t hear them. This is really frustrating and is one of the reasons I don’t activate 30 meters more than I do. But so it life and how much fun would it be if we never had problems to solve? It would get pretty boring pretty fast… Even with this RF hash coming in and out, I was still able to get 9 calls in the log on 30 meters today so I count that as a win anyway.

The next thing I want to share about today has to do with the antenna system I was using. I have made tuned radials for all of my hamstick except the 15 meter unit (I have not deployed it yet, but soon I will.) I went to a lot of trouble to tune these radials too, with a ton of time at home working on this. Well, it turns out that I didn’t need to do that for the 30 meter hamstick at all. I deployed my nanoVNA today and did some measurements on the hamsticks to confirm nothing has changed with them and figured out something just out of curiosity. Seems that the radials for 40 & 20 meters work just fine on 30 meters too. This means one set of radials for all three of those hamsticks. Next outing I will take the 17 and 15 meter hamsticks and tune them up and see if the same radials will work on them too…fingers crossed. I am always looking for ways to simplify my station setup and the radials has been one of the slowest things to deploy of all the gear for POTA with the hamsticks. So if I can get it down to just the two radials and not having to remember the color codes for them and such I will count that as another win in my book.

The above photo shows that the antenna is fine on the 20 meter CW section, even though it is technically low on the best part of the chart, it is only 1.188:1 where I normally work on the 20 meter band. Well, knowing that, below is what it looks like on 30 meters with the 40/20 meter radials instead of the tuned radials I made up for just for the 30 meter band. Pretty crazy huh? Looks almost identical to the 20 meter chart and even almost matches the 20 meter SWR value. I was blown away by how good this turned out and to think I have never even tried it before today… Another thing I noticed about hamsticks in general is that they act like bandpass filters across the HF spectrum, I did open up the range on the nanoVNA and it does have other nulls IN THE VHF SPACE, but each hamstick has ONLY ONE spot they are resonant at in the 0 - 30mhz spectrum. No multiple harmonics like the EFHW, just one really deep SWR null is all you get. So plan accordingly, but to be honest, it works really well so I am not going to complain. I think this might actually work as a band pass filter but have not had the chance to test it yet. Maybe I will set this up at winter field day and see what it sounds like there. That should do it.

Here is the log from this activation and the signal reports look good for a mismatched antenna on the trailer hitch of my truck. I was using 15 watts though so that might have helped some. I have been sending with more power lately to just play with the Argonaut to see how hot the heat sink gets at various power levels and on CW it barely gets warm at all with 15 watts of RF so I am really happy with that. I am doing this test since i changes the fan a while back to reduce the fan noise as the factory fan is quite loud. I have a blog post showing what I did with this if you are interested in that.

All in all I learned something new and had a great activation at the same time. So till next time go get your radio out and make some contacts on it!

Ten Tec Argonaut 5 goes to the park and then gets a new fan!

I love this radio, it works so well and is really easy to use with minimal menu settings. Then again I love all TenTec radios and have an unhealthy addiction to the brand…lol. Is it really that bad of a problem? I bought this one “for field use”, you know… like Field Day in June or POTA, but I have found things about it that keep me reaching for other radios most of the time. Let’s take a look at some of these short comings for a field radio that I like to use while doing an activation.

So I get this radio out much less for a couple of reasons… The main one is that it doesn’t have a CW keyer memories built in like the ICOM IC-705 and the Penntek TR-35 have in them. This is a big deal if you plan to activate for more than an hour or so as calling cq over and over manually can be strenuous to say the least with time. You see the keyer does something for me other than relieve me from having to pound out the CQ all the time, it BUYS me time. I am able to make log notes and fill in missing parts of the log while it is happily sending the CQ for me. This is a huge help after a quick string of QSOs and I am getting the times written down along with my usual log notes I like to make.

Quick rabbit to chase here… There is a few notable call signs for me on this page. K9IS is my first Hunter to get to 50 QSOs with me and KJ7DT has been showing up in my log more frequently lately too. The other call is the Canadian, just because he is DX…lol. Always cool to have those DX callsigns in the logbook. Now back to your regularly scheduled chat about the radio.

The next reason I don’t normally grab this radio is that it is fairly large compared to the other radios too. When I am operating in the truck, space is a valuable commodity and I am not able to spread all the gear around easily, if you will notice in the above photo I actually have the Argonaut balanced on my camera bag so it wont be in the way of logging… This actually worked out pretty well though and I think I will come up with something for the other radios to sit in the same area in the future, it was really convenient having the whole surface for my book and key.

The next reason is that the fan is crazy loud and runs non-stop even when I have it turned down to 5 watts for my QRP ops.

A little about the activation today is also in order. I went to K-2169 (my local park) and went to my quiet place at the top of the hill. As you can see, I had the place to myself as usual.

So I get parked, then start assembling the antenna and getting the coax into the cab of the truck when I notice that the cable adapter I have on the base of the antenna is loose, I am not sure how long it has been loose, but it was pretty loose today, to the point the BNC connector spun when I went to install it. This is how I found it was loose. Point here is check those screw together connections from time to time. They work loose too. The one on the back of the radio was loose too… which I thought was odd since I have only used it a couple of times so far.

Although today I didn’t need them, the BNC converter is a nice adapter to have in your kit. I could have used regular PL=259 connectors today, but I had forgot that the antenna and the radio both use them so I just used the same cable I use for the other radios and it worked great.

Another thing I have done is converted the power cable to use power-poles so I can plug it into any power source I use, which now also includes the power port in the truck too. I feel this is a worthwhile thing to do if you plan to work field ops a lot, standardization of the power connectors just makes sense.

I bought this case at the Huntsville Hamefest from Gigaparts and it is for some sort of military radio, but with a little cutting here and there and a little foam here and there it now houses the Argonaut 5 and a MFJ manual tuner as well as a wire antenna and some other miscellaneous items

Me and Roger (KG4WBI) have this obsession of printing out and binding all the owners manuals for all our radios. So I keep this one in the case with the radio and it was needed on this outing to see how to set a couple of menu items I had forgotten about.

Now for the Argonaut 5 Radio Fan…

The fan on this radio is just plain loud, that is the only way you can say it. It is also wired to run non-stop for some reason. This is also a pretty large current drain for no real reason at all other than to make absolutely certain the finals don’t get too hot… At some later point, I plan to make a small thermal sensing circuit that will fire a relay to cycle the fan instead of it just running all the time. but first things first, I am changing the fan itself with one of the low noise fans that another op from a TenTec group shared and it worked really well for them. I downloaded a sound meter app for my phone to see if it was measurable and have the two meter readings to see for myself. Ignore the AVG and MAX values, I watched the meter for a few minutes and did a screen capture of what was really going on to get a more representative number. 65 seems pretty low, but when you are listening for signals near the noise floor, every dB matters so the new fan comes in at 45(44.9 is what I captured in the screenshot and this was a pretty good average from what I watched on the meter.) Now also remember this is an iPhone app and not a legit sound meter, but it does give us something to look at for reference. If it is right, which is possible, then this is a 20dB difference. This is huge as decibels are logarithmic in nature and not linear, this is equal to 100 times quieter! That is awesome and totally worth the effort! To the ear, this new fan is dead silent, I didn’t think it was even running when I turned the radio on actually. So I am really pleased with how this mod turned out, the radio has one less detriment to keep me from using it at parks!

Old fan measured right at the back of the radio.

New fan measured in the same place as the old fan, that is a 20dB change!!!!

This was the ham shack with the Argonaut turned off for reference.

Orderd this little guy from amazon and had it in a couple of days.

This fan is literally a plug-n-play replacement for the factory fan in the radio. I literally removed the case screws, the fan screws, one wire tie on the wiring harness and unplugged the fan. It was the easiest mod I have ever done to a radio…ever.

Something of note, this new fan is thicker and the old screws would not work in my application, but I had a couple of screws in the junk drawer that were about 1/4” longer that worked great so I am back in the game!

The fan connector is a standard computer fan plug so it doesn’t need anything special at all. This is refreshing as it seems everybody wants to use proprietary connectors these days for some reason.

All in all, this has turned out to be a great little excursion in more than one way. I got the Argonaut on the air and I also got the fan upgraded afterwards too. I really like the ergonomics of the little machine so I will see how I can fit it into my regular activations and use it more now. Do you have a radio that you love, but just dont use because of some little issue? Let’s hear what it is and see if I am the only guy that does this.

72

David

WK4DS