POTA, HF Signals & Ten Tec

Today got so fast paced that I forgot how to do CW properly! Let me explain…

As you can see from the QSO map above, the bands were alive and well on this day from Raccoon Creek WMA (US-9875). The calls just kept coming in and I finally had to got QRT, with people still calling, and pack up as I had to meet the wife for a dinner date! I normally clear the little pile up I will draw in and then I can simply power down. I really felt bad about having to shut down with stations still calling me. I now know what those rare DX station feel like… It is surreal to experience that to be honest… especially from Alabama.

You see, today I activated US-9875 Raccoon Creek WMA and I went at a different time of day. I wanted to spend several hours here today as I dont get over to the area often and I wanted to try to get as many contacts as I could in the afternoon. My goal was 60 QSOs today which is way more than I usually worry about, but like I said, this park is a solid 40 minutes in one direction and I dont go this way too often so I wanted to “make it count” if you know what i mean.

I rolled into the WMA at about 14:30 local time and set out to build the radio down by the Tennessee river. This is a small parking lot at the end of one of the gravel roads into the WMA and a lot of locals come to this spot to fish in the river from the shore. Did I mention it started raining right after I got the antenna setup and I got into the truck? Well, let me tell you, the rain set in and it didnt stop the whole time. I even broke down the antenna and stuff out in the rain today!!!

The above photo shows what the station looks like right before I plug all that stuff in and turn the power on. Everything I need to get on the air is in that pile for both SSB as well as CW. To be fair, I can get by without the Picokeyer and the 1/8 mono to 1/8 mono cable and I could simple plug the paddle right into the radio and it would work just fine. So there is really excess here above what is absolutely needed.

I did get the nanoVNA out and look at the antenna to make sure the rain didn’t do something to it like push it out of band due to the conductivity of the wet earth or what ever. Turns out it was just fine… It was a little low with the water on everything but the null was really close to the bottom of the 15 meter band edge so I used it and didnt worry about it. If you will notice, it was only 1.233:1 SWR at the band edge so it was plenty happy and we never checked it again after this on 15 meters. When I switched to 20 meters, the SWR had moved up to about 1.8:1 or maybe it was at 2:1 but I ran it and as you can see in the log, that didn’t seem to matter at all.

I setup shop on 15 meters SSB for a change and wanted to see what I could get before 15 faded out, but I noticed almost immediately that the ALC light wasn’t coming on at all when I would transmit audio. This lamp should just blink on the energy peaks but it wasn’t coming on at all. I messed with the mic gain and nothing. I did notice that I could wiggle the cord at the plug and it would make all sorts of stuff happen. This pointed me to the connector being faulty somehow but workable to some degree.

I made a few contacts with it like this and basically yelling at the radio would barely get the ALC to illuminate. I asked the last person for a report and they told me the audio was muffled and weak. Armed with all this knowledge, I decided to open the connector and see if a wire was broken. Well, they were not broken…but they were also not connected either. There were two cold solder joints from the factory…figures. I got a pretty decent photo of the green wire in the below photo. Well…that shuts down the SSB portion of this activation so onto 15 meters CW!

The 15 meter band has two things that make it unique. It is quieter than the lower bands for me and the “skip distance” is MUCH further with mobile, or improvised antennas. I didn’t make many CW contacts on 15 but check out the locations! Washington state is pretty common for me on 15 meters, in fact the entirety of the western United States is easier for me to work on 15 meters during the day. But a lot of people apparently don’t know this so lots of times the band will be open but there wont be anyone on it. Case in point today, I worked 4 ops in 11 minutes of calling CQ.

After vacuuming the bands of CW ops, I moved to FT8 to see what was happening and this is my “yardstick” of how open the band is. Turns out it was REALLY open! 15 meters FT8 netted a nice dozen contacts and got me almost half way to my original goal of 60 QSOs! This didn’t take long either and just goes to show that the higher bands are great if you will just go check them.

I had switched radios to use the sBitx V4 (I did the software upgrade and got some new features like the color coding of FT8 information you see below) You can also see that I was transmitting with 17 watts too. This is not precise, but it is close and I use it for my logbook notes.

After finishing on 15 meters I moved down to 20 meters to finish out the day. The sun was starting to set at this point and I knew 20 meters would serve me better at this point. after hunting W9XT, I set up shop on a clear frequency and started calling CQ, this is when things got a little crazy. I had a nice little pileup form pretty quick that took me about half an hour to clear, then nothing… It must be band fading at this point as the stations just vanished. I figured I would switch over to FT8 for a few minutes at this point too and see what I could get in that mode. I didn’t mention that I used the sBitx for CW at this point and to be honest, I dont think I will use it for CW seriously till there is a software change to make it work better. If you try to use it much past 18WPM it is like it fights you and induces mistakes for some reason. The people smarter than me in the email reflector seem to think is has to do with how the software scans the inputs on the radio, but I do know it will induce mistakes in your sending if you are not very attentive and send a very specific way. It will work if your careful and go about 18WPM max. I can use a keyboard to send CW but that really isnt all that much fun to be honest.

I struggled with FT8 today on 20 meters for some reason. The QSO could not complete to the 73 so it would not autolog the QSO. It would also not finish the exchange many times either. I could get it to send the signal report then they would send back and they would just get stuck in that step and never move past it. It got really frustrating towards the end, but I did manage to net some contacts here too.

At this point I had made 48 contacts which is a phenomenal day out for me, but I wanted 12 more to have that 60 that I started out my goal with! So at this point I move back down into the CW portion but this time on the Ten Tec Scout 555 instead since the CW mode on it works beautifully.

It took me a couple minutes to switch the radios out and to find a clear frequency and get started, but once I did, it didn’t take long to get a HUGE PILE UP going!!!! I got so excited during this part that I was racing the clock to see how many I could work before having to shut down the radio and go home as I was almost out of time. I started rushing the closing and it was here that I got sloppy with my CW. You see, I normally use QRP power levels for the most part, just the sBitx and the Ten Tec Scout are QRO by the rules and the sBitx is borderline to me. I will usually turn the power down to 5 watts or so anyway to preserve the finals in the radio but today I had the Scout and it is set at 50 watts and is not easily field adjusted from that power level.

As the pile up raged on, I got so lost in the process that I started sending 72 intermingled with contacts getting 73 instead and finally someone stopped me and asked why I am signing both modes and this is when it hit me. I had been running on autopilot about half the time just logging contacts and the muscle memory would just send the 72 and I would not even think about it. I would then called QRZ and get another call, rinse and repeat… Here is the next problem for me. My ragchew copy and my POTA copy are very different levels. He sent me the message at the speed I was working POTA contacts. Your brain will learn how to copy the formatted style exchanges without even thinking about it. I know that I am going to get a two letter state after the signal report and I can copy callsigns really well for some reason up to about 25 WPM, but send me a full sentence question and it breaks my brain. I cant copy half of it without writing it down. I can ragchew comfortably at 18 WPM max at this time, but if you ask me a question about my radio or something that isn’t part of the usual banter in a POTA contact and I am lost… I apologized for this mistake I had been making for probably 20 minutes without even realizing it and it was really close to when I had to leave anyway so I went ahead and called QRT to get the radio put away as it was raining really well at this point too…

To everyone that reads this that I didn’t get to work on this day, I am sorry to have to had shut down the rig and leave, I was having a wonderful time and wanted to stay longer!!!

The moral of this part of the story is dont get in such a hurry that you cause confusion with the hunters, take your time and be sure in what you are actually sending out over the airwaves.

On a brighter note, I got my 60! and 14 more!!! I dont know how long it has been since I got that many calls in the log in one day. Until next time I hope to work you on the air!

73

WK4DS - David

A simple POTA activation

Today saw me use the Ten Tec Scout again to great effect. Below is the case I carry it in showing the full compliment of band modules (I keep one in the radio and today that is the 20 meter module). Under the radio is the power cable in a pocket just for it and next is the spot for the microphone in a more permanent role. You can see the impression from where it sits in the case currently.

These hard cases come from Harbor Freight and make wonderful travel cases for my POTA radios to be quite honest about it. I need to get two more and kit out my Ten Tec Argonaut 5 and my Penntek TR-35 and the set will be complete. The Argonaut has a nice hard case, but it is really large and kinda hard to maneuver with. I thought it would be a great kit for POTA and it does work, but I would really like something different… As an aside, I store the owners manual to each radio behind the lid foam on all of these. That way I have a instruction book should I forget how to do something obscure that I dont use all that often.

I have not dismantled a band module to see what all is inside it but there is a good bit of stuff going on in each one. They are about 3” long and the circuit board goes all the way to the front. So there is plenty of widgets inside them to make the magic happen.

Today, I only used the 15 and 20 meter modules as I was being a little lazy and only put out radials for these two ham sticks. A quick SWR check with the nanoVNA and I was off to the races.

The above shows my CW key and keyer. The key is made by N3ZN and if you have not tried one then I highly recommend them. It works beautifully for me. The keyer is a Picokeyer from Hamgadgets.com and works way better than it should for what it costs. Since Ten Tec radios traditionally dont have memories for the CW keyers, this is the way to have those memories really easily.

The next thing I did that was out of my usual character is to get the hand mic out and work some SSB today as well. It worked OK, but there were times when the audio was odd and I would get little hints to something being wrong but all in all it worked fine.

As per my usual outings, I had the place to myself today with only a couple of cars rolling by during the entirety of my activation. I like it like this though as there is no ignition noise to deal with or inverters making RF hash, just the peace and quiet of the park and my radio chattering in the truck. During this time of day, the sun will beam into my door if I roll down the window beside me so I usually just roll down the other three and the one beside me just a little so the air still moves through the truck taking away the heat from the radio and making it nice and pleasant.

Just look at that parking lot all for me! HaHa! That never gets old! There is just something magical about the peace and quiet of a park like this.

Something I learned today that is different between the Argonaut 5 and the Scout is that I have to use the key jack to make this radio transmit a side tone in CW. I can key the transmitter with the “mic jack cable” that I made for the Argonaut 5 but it wont produce a side tone with the Scout for some reason. So I instead used this port on the back of the radio to get it to work right (see photo below). Another special thing about this radio to me is that it has a Curtis keyer chip in it and you can plug a set of paddles directly into it and it will work as you would expect, but it is in a different port… Go figure. All these options are hot all the time too. Plug a straight key into it and key it to send CW then you could (theoretically) just pick up the microphone and talk to someone on SSB without changing anything else on the radio. It appears that it is in SSB mode all the time and CW is just the side tone being transmitted instead of the audio from the microphone. This does cause one little issue that a user will notice pretty quickly. The zero beat is the display frequency plus or minus (depending on band) the side tone frequency. The filter is simply a bandpass knob that adjust the filter bandwidth and that is it. A very simple radio that just works.

An example of the side tone offset in CW can been seen in the photo above where I am tuned up on 15 meters. It displays 21.0523mhz but the radio is actually operating on 21.053mhz when transmitting. So if you are near the band edges on say 40 meters CW, just keep this in mind so you are not transmitting out of band. The owners manual even mentions this to make sure you stay compliant with FCC regulations.

As you can see from the log above, I started out on 15 meters CW and worked several stations there before moving to 15 meters SSB till the band essentially faded out. At that point I decided to see what would happen if I went down to 20 meters SSB and called CQ… Well the log speaks for itself. I made 26 contacts in 15 minutes! This has to be some sort of world record!!! LOL…for me that is… It was wild how big the pile up was and how quick it happened! The people were super nice and courteous and really helpful so I thank all of you that called me this day and I really appreciate you stopping by to say hello!

73

WK4DS - David

Go bag POTA!

Today was about testing my emergency / travel radio to see how it performs in the field.

I did the entire activation from Eagle’s Nest in US-0716 with just the “kit” radio that I have put together. I have the QRP Guys SWR meter in the photo here as well, but this is because I wanted to check the 40m Endfed Halfwave Antenna from Reliance Antennas to make sure the SWR was ok. He cuts them long so you can tune them once in the field and I have not cut mine yet.

This particular nylon bag came from Amazon and has two main sides that unzip and lay flat. Inside each side are additional pockets to hold small, thin items as well. I have organized mine to hold the Penntek TR-35 and all the stuff needed to deploy it in the field. Literally everything. Let’s go for a short “walk” through this bag.

In the above photo is the radio, antenna and a power cord with Anderson Powerpoles installed. I also have the battery pack in the zippered pocket (more on that later). As well as a rope and weight for throwing a line up into a tree to haul up the wire antenna with. I just wound off about 40’ or so of arborist throw line for this kit and I have included a huge 1'“ nut from the machine shop for a throw weight, which works perfectly…

The other side contains the coax for the antenna and this is the only thing that I have two of in the kit. Coax has let me down more than once while out at parks so I now carry backup coax. No matter how careful you are with this stuff, it will fail on you. It just ins’t designed for all that movement and eventually you will break the center conductor. This is also why I check my system with the nanoVNA before starting…except today where I used the little SWR meter instead. One of the coaxial cables is the gold colored one made by ABR Industries and it has the ferrite common mode choke built into it. This is really wonderful coax and I wished I had learned how important quality coax was a long time ago…it makes a huge difference.

Also in view in the below photo is the N6ARA CW key in the little storage box it comes in and the headphones are in a ziplock bag to keep dust and dirt out of them. Nestled into the pocket behind the coax is a small notebook for logging. I also have a pen (my preferred tool for logging as I can see it easier than pencil) and a pencil since a pencil never runs dry, it is my long term back up to me pen…lol. I dont really trust pens either…haha.

So here is the station assembled and under power. You would be surprised at how long this radio will run on those AA batteries too. It is really shocking to me how well this little system works. I have yet to have the batteries die during an activation and one of them was three hours long. I need to run them till the radio dies to just see how long they will last at some point, but for now I know I can get at least three hours out of them. Also note that it is 10 AA rechargeable batteries, this gives me almost 14 volts which is what a car battery produces when new.

Here I am pointing to the coax that I used showing how I laid it out. I started with it in a “U” shape at first but the SWR showed to be 2.6:1 and I did use this for a bit as the TR-35 has final protections that make it pretty much impossible to damage them.

After a few minutes though, I decided to straighten the coax and this moved the SWR down to about 1.7:1 making me much more comfortable. I then checked all the bands that the TR-35 covers and only 30 meters was not usable. So that is why you see contacts on three bands instead of 4 today. Haha

This is what I came up with to keep tension on the wire antenna and keep it off of the coax. It worked OK, but it the future, I would prefer to get the antenna higher. I also want to add another piece of cord so I can raise the transformer end of the antenna off the ground too. I think this will also help with radiation angle and pattern. The Reliance Antenna EFHW works really well and I am glad I got one from them. This is one of those items from the “Ham Made Gear” forum on QRZ.com. I have bought a few items from this area and have never been disappointed.

In the below photo, you can see my truck parked where I normally activate from and on the right side of that are a couple of trees that I tied the antenna up into. It is strange looking out on it now that it is cleared compared to just a few weeks ago.

Now to talk a little about my battery pack. This is a simple 10 cell pack from Amazon that I soldered a power connector to so I could plug it into my radio. This didn’t occur to me to be a problem till a week or so ago when I got it out to charge the cells for this outing. When pulling the cells I noticed what you see below. The springs are melted completely through the housing. It took me a few minutes to figure out what happened. Turns out the power connector has the ground connection on the outside of the barrel and this contacted one of the points along the bank on the outside and this shorted several batteries to the ground connector. As you can see, this turned several of the springs into heater elements and melted the housing. I am able to use it though as I simply stretched the springs a little and now they work fine. Live and learn. Now I think I will pull the last battery from the bank and store it in a ziplock bag so it can’t short out again. I also though about fusing it… seems like the smart thing to do

I didn’t make a ton of contacts but I still had a lot of fun. As you can see in the log, I had a good little run calling CQ as well as hunting on 20 meters before switching to 17 meters. 17 meters is one of my favorite bands these days and I was happy to get a few calls in the log on this band before moving to 40 meters to finish the day. All in all, it was a great day for radio and I hope to work you soon on the air!

72

Getting back to my roots…with CW

Today I activated park US-2169 with the Ten Tec Scout and only used CW.

This was a pleasant change from the FT8 I have been using so much recently. I was actually planning on switching to SSB then FT8 as well and use all three modes in one sitting…but…CW was working SOOOOOO well.

I also decided to setup at the picnic table by the canyon rim so I could use a 41’ wire antenna and a tuner. This allowed me to go up to 10 meters as I checked the spot page and a bunch of people was already there. I worked on getting the antenna tuned a while, only to find that I had used it wrong. Once I figured this out, I was able to get it to tune to about 1.5:1 and this is perfectly fine for a Ten Tec.

I was blown away by what happened next.

Here is what I took with me today… all those cases have different radios in them. The orange case is the sBitx (my goto FT8 rig in the field) the green case is the Ten Tec Argonaut 5 and the tan case is the Ten Tec Scout. I was loaded for bear. Lol. I was going to use the Scout for CW and SSB and then switch to the sBitx for FT8. Then why did I bring the Argonaut 5 out? Because the keyer and paddle are in that case that I wanted to use. HaHa. I also used the tuner and some cabling out of that kit as well.

Let’s talk about the Scout for a minute. This is a unique radio in that to change bands you change these modules that plug into the front of the radio. I have the whole set of band modules for my Scout and keep them in the hard case with the radio. It is an interesting little radio that also has a unique tuning device. The radio has a PTO instead of a VFO. So the knob has a distinctive resistance when you turn it as it is a mechanical screw driving a core into an inductor. This also means it remembers the frequency you are on without the need for a memory battery.

I kept the nanoVNA on the table for tuning when switching bands and I elevated the tuner on a pair of lineman pliers to make tuning a little easier. My Scout is unmodified from original and works really well. It does have some quirks but nothing that is a deal breaker.

The station as operated today. I like this spot as it is also in the public view and can sometimes spark conversations with passerbys. I had a conversation with a man and his wife on this day and he was in the signal corps in Korea and was copying the code as they walked by. He waxed nostalgic for a few minutes and we had a wonderful conversation and then they were gone…

The below photo shows the tree where I strung my antenna up to and you can see the table in the background it went down to. I like to string up a huge 65’ wire most of the time but today I just used my 41’ random wire since it was already in the kit.

These new LiFePO3 batteries are truly amazing to me. They weigh almost nothing and I operated for two straight hours at 50 watts and the battery was still at 13.26VDC. This blows my mind. I can pick this battery up with two fingers! I also ran it through my fuse distribution block so everything was fused.

This log shows how awesome the band was on this day. I started on 10 meters CW as I was listening around and the first call I copied was England! That was when I knew it was going to be good. I didn’t get him, but shortly after I started calling CQ and 6 out of the next 10 contacts were DX!!! The first one was Chile and I am pretty sure that is the first Chilean I have ever worked.

After that I noticed the rest were from the European area of the world which is still awesome! The other domestic callsigns were still very far away and I was stoked to mess with other bands as well to see what I could hear. After these initial 10 QSOs, I found that the band was fading so I figured I had hopped on the air at just the right time and caught a wave. At this realisation, I figured I would give 17 meters a try and see what happens. It was much more difficult for some reason, not much activity at all… I guess everyone was up on 10 meters… haha.

So after that, I figured I would just test 15 meters before calling it quits for the day. Well, I must have hit a band opening on 15 meters as well. The calls started coming in and as you can see below I got South Africa! That is also a first for me!!! I normally cant hear Africa since I use less than ideal antennas. I had a blast on 15 meters and the logbook reflects that. I even worked two “regulars” that I know by name but have never met in person! KJ7DT - Paul in Idaho and K9IS (who I have written about before) - Steven in Wisconsin. Both of these men have worked me well over 50 times and I am pretty sure Paul is over 100!

It is really cool to get “Z” calls in the log though as I rarely hear this call letter on the air. I always think it is way off, and sometimes it is, like the South African station but then I get one and it next door in the Caymen Islands too…lol.

This was an awesome day and I am glad you followed along in the story with me. Until next time, I hope to work you on the air!

WK4DS - David

73

Jumping on 40 meters right quick…

Today saw me testing a theory, that 40 meters wasn’t closed just because it was late in the morning…

When I got to US-2169 today, I wanted to get on the air quickly, so I decided that I would activate the Sitton Gulch parking lot instead of going to the top of the mountain. This one thing adds about 40 minutes to my operating time as it takes me about 20 more minutes to drive to the top of the mountain from here and then there is the drive back down. Armed with this extra time, I decided to also add a long radial so 40 meters would tune up to a usable SWR. I was able to get the SWR on 40 meters CW down to about 1.6:1 and this is what I made all my 40 meter contacts at. The beauty of Ten Tec radios is their notoriously robust transmitters and the legend that they can survive transmitting into 10:1 SWR without ill effects. I have personally used my Argonaut 5 in 2.5:1 conditions and had no problems at all.

Today I thought I would just jump on 40 meters for a minute and see what I could scare up on CW then move over to FT8 before heading up to 20 meters. I was not ready for the pile up that happened next… It was interesting as there really wasn’t much activity on 40 meters at the time when I hopped on. It was almost lunch time at this point (late morning) and the noise on the band was picking up. I sent out my CQ a few times and it didn’t take long to get an answer. I also spotted myself on the app too and I am certain this helped immensely as well.

I worked over 10 contacts in about as many minutes and was stoked to have bagged the activation so easily. I switched over to FT8 now that I have cleared my little pileup on CW and see what I can find there!

I simply added a couple more radials to the antenna to help with SWR so that I could operate on 40 meters today. One of these radials was over 30 feet long! The 40 meter ham stick that I have is not that great of an antenna from what I have seen. The SWR is really touchy with it and I can not get it to tune without several large radials helping it. I dont know what I am doing wrong with it, but I really need to figure it out as the 40 meter band is a lot of fun!

The measurment kit below has becoume part of my permenant truck POTA kit that I take with me everywhere. It has the nanoVNA and all the associated widgets for it as well as a simple little multi-meter to check things with out in the field. This has been very valuable at times and a I recommend everyone carry a simple meter with them.

Here is a simple little hack that I found with my Ten Tec Argonaut 5 radio that I though was cool. You can make up a front (mic plug) connector for the keyer cable instead of using the tiny one on the back if you will simply wire the keyer contact from the keyer or key across the PTT contact on the mic plug. It works flawlessly and is simpler to setup for me. I have the cable for the back too should this one fail for some reason, but this is more elegant for me. Notice all the RF blocking devices I have added to the lines to reduce (read that as eliminate) erroneous characters from being sent due to stray RF.

After my little interlude on 40 meter CW, I switched radios to the sBitx to be able to work some FT8 on 40 meters as well… This was not a great idea as the SWR was 3.5:1 in the part of the band and I didn’t want to risk damage to the finals so I made one contact and then moved to 20 meters for the duration of the activation. Once on 20 meters, this is where things REALLY took off for me today. I started hunting and pouncing on contacts on FT8 before I finally just setup on an empty slot and started calling CQ myself. This produced a lot of contacts. A really good run ensued and I was glad to see that I was able to put many calls in the log on this day with the sBitx. Shoot, I even worked a couple of SSB contacts as well, but it was a struggle to be honest with only about 9 watts or so in the SSB portion since my antenna is tuned for the CW portion of the band.

Here is a rare glimpse into my “go” kit for my Ten Tec Argonaut 5 as a CW kit. I need to add the microphone to it so I can use it for SSB as well but I am not sure if the SSB mod has been done to this one yet. Haha. It works so well for CW that I have not bothered to check! But the kit contains the radio, tuner, wire antenna, key and keyer plus all the cabling to get everything connected. It is only missing a power source but that is by design. I carry batteries for remote ops or plug into the truck for mobile operations which is why I dont have a battery in the kit.

Here we have yours truly operating the sBitx on FT8 and to be honest, it works almost too well for this. To the point that I am almost not even interested in the other modes with it… Almost… I love working from the bed cover if it is nice outside as it is the perfect height for my uses.

This was a great day for radio and the logbook reflects it, looks like the solar cycle is picking up for the winter run! This is the time to get on ten meters and work some DX yall! I should know as the next blog post will reveal next week!

73

David

Activating a park in bad conditions

POTA activating in bad conditions can be challenging… for some modes. Seems that FT8 doesn’t really care if the bands are crappy and will gleefully allow you to play radio anyway.

This was an experiment to see if the sBitx amateur radio could work in terrible space weather like you see below in the report.

The above and below photo show how fast the band conditions changed on me while activating on this day. The band noise could be seen on the display “walking” across the band segment at times. This band noise would pretty much wipe out what you could hear on the band, but the radio could still decode the FT8 signals so I was able to work almost 20 stations in about an hour even with this sort of noise coming into and out of the band.

I normally dont bother activating in bad band conditions, but this day I really wanted to see just how good FT8 was at extracting signals from the noise. I can honestly say that I was impressed by the performance of this mode. Digital modes have their place and this is very much one of those places. Weak signal in poor band conditions shows just how important it is to use all the modes available to the amateur radio operator. I was once a die hard CW only op and to be honest, it is still one of my favorite modes, but of late I have started getting into SSB more and now I am also dipping my toe into digital modes more and more and I am really liking it. Dont limit yourself out of a stigma like I did, you might just like what you find.

Below is a photo of the display that shows something that i had never seen before and that is the pulsing band noise. That was a new one for me. It too would come in waves and these would last much longer it seemed. The sBitx just kept chugging along though, I would sometimes pick calls and sometimes answer calls and this is what makes FT8 awesome. I couldn’t have possibly made SSB contacts in these conditions…

Here you can see the operating position for the day. Perfect blue skies and nice temps makes for a great day on the air at a park. I had to goto this spot as the lower lot was completely full since the weather was so nice, it was fall and a Saturday. Sometimes going to this spot has it’s perks like lower band noise from the campground inverters and such so I dont really mind it.

I had planned on using a battery and setting up on the picnic table I usually occupy down next to the canyon rim, but there just wasn’t anywhere to park and I didn’t want to wait on someone to leave just so I could park.

This radial is on it’s last leg. I have twisted this broken radial back together for months now and on top of that, the connector on the other end has also broken off. This is almost comical as this is the best performing radial in my set! That is why I am reluctant to repair it at this point…lol. It just works and if it ain’t broke (figuratively) then dont fix it.

I dont know when this bug (I think it is a jumping spider) decided to join in on the fun but here he was playing on the antenna mount. By the time I finished the activation, this little guy was long gone. Kinda fun to notice the little things like this when you are out in the park.

By the end of the activation, I had worked 18 unique contacts and garnered one dupe because I didn’t read my logbook very carefully and called one ham two times…then I decided to attempt to work some CW. This was pretty futile though as I only worked one contact out of about 15 minutes of calling as this is abysmal for me when I work CW. I can usually work about one call per minute even when I am running QRP power levels. So when I only work one…that is bad band conditions. The stations would literally just disappear then reappear and it was impossible to get complete calls so I called it quits after one.

All in all, it was still a great day in the field. Hope to work you soon!

WK4DS

sBitx V3 HF radio special functions

I recently activated a couple of parks and decided to add a bluetooth keyboard to the sBitx V3 and see how operational it would be like that.

On this day I decide to activate Chickamauga Battlefield but first it seems a “widow maker” dead tree fell into the pull off at US-0716… I cleared what I could without a chainsaw and then setup the radio.

The below view gives you a good measure of just how big this “parking lot” is…lol. This lot would hold two small cars or my truck and a motorcycle and that is about it. The cars going by are the worst part though. These cars sometimes emit terrible amounts of RF hash… first world problems I guess…

I setup the usual antenna system but only for 15 meters as I was feeling a bit adventurous today and figured I would stick it out on 15 meters till I got the activation secured. I could have done the same thing in 15 minutes on 20 meters using CW, but there are plenty of ops on 20 meters already so I figured I would warm up another band instead. Well, the QSB was obvious when watching the FT8 waterfall, you could see the band come in and out as the stations would get real loud then fade almost all the way out. This made FT8 challenging since it takes a couple of minutes to complete the series of messages. None the less, I was able to get 11 contacts anyway, even with the frustration of some more that never did complete… but so is HF, she is a fickle girl at times…

Today saw the common mode choke come back as I had it nearby and the SWR was a little off. So I threw it inline with the radio to keep it happy. These are really simple to make and I show how I do it on a video, that is in live-stream format, on YouTube, at this link if your interested. Link to video about making a common mode choke for QRP work (it can probably handle 100 watts without issue but I have not tried it) and POTA ops.

Below we have the operating position for today, notice I didnt even bother with the CW key today as I had planned from the outset to only work FT8 and then pack up. Took me longer than I had anticipated but I did it! haha. Well, to be fair, I did have a CW key in this photo, you see the sBitx will also send CW from the keyboard. I use this to great effect at the other activation I am going to talk about shortly…

The one thing I really like about using 15 meters from a park with a ham-stick antenna is that I am able to work DX pretty consistently. As we see here I worked 5 DX stations out of the 11 I got into the logbook that day. That is a phenomenal amount of DX stations for me. I just seem to get REALLY good propagation when I get on 15 meters for some reason. I will get one every now and then on 20 meters, but I get them regularly on 15… just something to think about if you are into chasing DX and want to also do POTA…and use a ham-stick antenna. You see every contact you make from the park counts towards your POTA log, so even if they are not participating in the program, like a recent ragchew I had while at a park, still counts to your 10 you need for that day.

The other park I went to recently was Booker T Washington just NE of Chattanooga TN. I have not been back to the park for a while so it was nice to put it in the log again. Instead of struggling around on 15 meters at this location I chose to run 40 meters and 20 meters for a while instead. I hopped on 40 meters FT8 to start with as I have not been on that band from a park using FT8 yet. It did not disappoint. There were a few stations still lingering on the air so I was able to work several of these stations before the band noise got so bad that I could not complete contacts and further. I even worked the W0E special event station which is really cool.

This is a really old park and has changed over the years. These were once campsite areas but have since been simply turned into day use “picnic” areas with most of them essentially becoming simply parking spaces for people that go for walks. There are a few that have picnic tables and even grills but most are now just parking spaces along the loop.

After working 40 meters FT8 for about 1/2 hour or so, I decided to give keyboard CW a try on the sBitx V3. This also did not disappoint. I was surprised how easy it was to transition from using a paddle to using the keyboard to send CW. It did take a little getting used to for me to become proficient with it, but after just a few minutes it was like I had been doing it for years and I even figured out the keyboard short cuts for the memories too, so I could use them easily for the exchange and such. This made it easy to log as well as send so I kinda liked using it this way to be honest. It is more fun to me to use a keying device of some sort, but if I forget my key, I now know I can still get on CW and make POTA contacts with it easily. That is a nice option to have in a 400$ radio to be honest about it. Well, to be fair, if you have used an sBitx for sending CW, then you also know how frustrating the keying is with it. It is possible to use it to about 20 WPM or so without much issue but above that, the keying delay because of the way the code is written, will cause the radio to send mistakes. Once you learn to hold the key just a little longer than usual it works just fine at speed of 20 WPM and less so it isnt a huge deal for me. Much over that though and the radio just wont work as of right now. From what I have heard, there is a beta of the next version of the code that will address this problem, but I am not able to compile the code properly so I am patiently waiting for the official release to drop before upgrading again. JJ just released an update to his fork of the code as well and it has a bunch of new features like a tune button and such, but I am also waiting on that one as well so that the bugs get ironed out before I install it on my machine. Now back to the activation…

After that I hopped on 20 meters FT8 and jumped into the fray for a few minutes to see if I could grab a few more calls for the day right quick and that would be a yes! I got 3 more stations in the log using this mode on 20 meters as well. What a day!

Today also saw nice enough weather to setup on the bed cover and these two photos show how I have to do this if I am on the truck power cable from the cab. It is just long enough to reach out the window and power the radio…lol. Barely… (I really should make a longer power cable or something…haha) This worked out today as the whole location was in the shade so I didn’t have to fight off the sun while trying to activate. A lot of the time, this is the reason I don’t operate from the bed cover in the summer, it is in the sun and just plain hot…

As you can see below, the height is about right for me activating too, I can write as well as operate the radio and it is at just the right height for me and my stature. If you like to work POTA, and you do regularly activate, what is your normal operating position? I have a few with this one being one of my favorites even though I don’t use it much.

Thank you for following along and I hope to work you on the air soon!

73 - WK4DS

POTA AAR using 3 modes on the sBitx transceiver

Today marks the second deployment of the sBitx and me using it on three different modes.

You see, I spent a good bit of time recently solving the weak audio problem with the SSB mode in this radio. I found the microphone input level is really weak and there was a common solve by installing a more powerful microphone element in the hand mc. I tried this approach and it really didn’t help much for me. l was essentially still yelling at the radio to get it to work. Pictured below is what my radio looked like on the work bench as I worked on the audio level for the microphone input.

I ended up building a pre-amp circuit to boost the audio several dB and this fixed my weak audio problem. I wrote about it in the blog and recently published that post as well if you would like to know more.

Back to the activation, it was a beautiful day and wasn’t really all that hot either. This is a nice departure from the July temperatures I had been dealing with recently.

I setup in my usual place but indexed the truck about 90 degrees so the sun wouldn’t shine directly in my open door. This allowed me to leave it open for the most part. I get so much more aurflow with the door open as opposed to just rolling down the window.

I also ran my 20 meter ham stick on the truck hitch mount I made and just deployed the two radials I tuned for 20 meters. I planned on this activation being kinda short so I didn’t setup for any other band since 20 meters is so active I should easily get my activation locked in on just that band.

I do have some future plans for the antenna mount though. One of thise is to incorporate multiple ham stick mounts (2 specifically) to allow for band hopping without having to get out of the truck. This way if I am setup on a rainy day, I can go ahead and setup two bands at the beginning and then just stay in the truck.

I am beginning to think I want to install a screwdriver antenna again like a Tarheel or something like that and just use that for the quicky ones. I have heard good things about Tarheel antennas and it would make a bunch of my activations so much faster.

I use these CB antenna mounts you get from the truck stops for my base connections. It is an easy way to build an antenna mount from scratch as it has everything you need to attach the antenna to the base.

Something else I like about the sBitx is that even though it is a touch screen design, it can also be mouse operated. This makes using the radio about 100 times easier as some of the touch functions can be fickle. Like picking a station to call on FT8 from the list. It isn’t super hard to do by hand but it is MUCH easier to do with a mouse. Because of this, I have started bringing a USB mouse with me on my activations.

Yet another reason I like this radio… lol. It can also use a USB keyboard as well and you can “type” CW with it if you want but I dont worry with that as I really dont have the room for the keyboard at this time. Maybe at some future point I will add a shelf for those items. Haha.

All in all it was a great activation and I really enjoyed the time at the park as well. It was really cool to be able to use SSB with this radio! That alone made this particular trip unique. I think prior to this that I had made just one SSB contacts total! ONE! Now that mode is going to be showing up in the logs more and more and I can’t wait to share those trips with you one here.

73

WK4DS

Roadside POTA in the rain for the win!

Today once again saw the Ten Tec Argonaut come out of hiding to make some CW contacts. I really love using this radio for some reason and it has become a permanent part of my POTA kit at this point. If I travel and take radios, this is one of them that I take now. I just love the whole thing..,

This is what my POTA wagon looks like most of the time now. Antennas are in the tube, COAX rolled and at the ready next to it. Camping chairs stay in the truck now, I dont even unload them anymore. Lol. Then a laundry list of other stuff stored in totes to keep it somewhat organized. This is why I like the hardshell bed covers, it turns my truck into an overgrown car with a giant trunk.

When I got there it had just started sprinkling rain so I decided to setup in the truck and just use CW for a change. This means using one of my all time favorite CW rigs for POTA… the Ten Tec Argonaut 5. So I hastily deploy an antenna and a single little radial and hop in the truck to avoid the rain.

Funny thing is, the rain never happened…

I went ahead with the activation anyway as planned. This also meant I got the N3ZN key out as well as the Hamgadgets Picokeyer. This combination is a great little setup but today my mojo was off for a while or something. I couldn’t seem to get my act together and send decent code for some reason… about 15 minutes in, I guess I got warmed up and was able to do much better but those first few contacts were rough.

As you can see from the report above, the space weather was kinda strange that day with the high probability of a flare coupled with the K index being elevated as well, but the noise floor was really low so what does a guy do?

I got on the air with CW is what I did. The band was fading pretty good but it was workable so I started working some contacts. You can see below that one of my RBN reports shows that I had pretty strong signals at times. The QSB was deep at times though and this made getting contacts a little challenging at times. It is always fun, but some outings are more fun than others…lol.

The station is convenient in the cab of the truck but it is also noisy. You have to balance the ambient noise level with your mode and comfort level. Here you can see a car has just went by. This can be so loud that I can’t roll down my window for the car noise of some cars. Another option for CW here is to wear headphones and this has worked in the past, but today I didn’t bother with them.

That is another beautiful thing about FT8. I can turn the volume all the way to zero and still make contacts just fine. This is nice when it gets really hot as I can idle the truck and run the AC…lol or be in a noisy environment like here and still make contacts with ease. Just something to think about when choosing your location.

In this photo, I am holding the cable up to show I have wired it to the PTT input on the front of the radio. I made this cable up for 3 reasons:

1. The cable is easier to connect as the port on the back is right next to the heat sink and is hard to work with at times.

2. This location reduces the chance of stray RF causing the keyer to send erroneous dits and dahs since the coax is on the other side of the radio.

3. The cable is shorter and thereby easier to deploy and stow when done.

This was an experiment to see if the Picokeyer could also operate the PTT line on the front of the radio as you can use the hand mic like a straight key on these Ten Tec radios.

As you can see from the log, I had a regular ole QSO ragchew style contact right off the bat. This is from the fact he must have been simply on frequency when I called QRL to see if anyone was there. He answered and we had a nice little chat before I even got started with my usual POTA stuff. I was a little surprised by the band opening to the west coast as I got Washington state, Utah and New Mexico all in the log on this day. Usually 20 meters and a hamstick don’t play well with the west coast. Especially from a super compromised location like I am using here. Maybe it had more to do with my ground plane was deployed south and west today. You see, at the other local park I am normally deploying the radials to the North, East and South but the orientation of the parking lot is such that I can’t easily deploy a radial to the west. This doesn’t seem to matter for 17 and 15 meters though as I routinely get stations from out west on these bands…who knows?…

POTA at US-0716 with only Digital Modes...

My plan was to only use FT8 and get the activation as quickly as possible, but in the end it ended up a little differently. This POTA park is a national military park commemorating the battle of Chickamauga during the US Civil War in the late 19th century. It is now a recreational hot spot along with a tourist destination so they have all the trappings of a outdoor recreational area along with the monuments about the war. This trail head was across the street from where I parked the truck today.

Another reason for the singular mode was that it would only require the use on a single radio this time since I am currently using the Ten Tec Scout along with the sBitx SDR for my POTA activities. I only deployed the sBitx SDR today so I could stay inside the truck and run the air conditioner as well since I didnt need to hear as well as I would if I were doing CW or SSB.

By only using one radio the rain that moved through the area didn’t hamper my activity at all. I was able to get setup quickly enough that I beat the rain and was on the air before it started to fall.

I like this location on sunny days since it is in the shade, but today it was overcast and rainy and this didn’t really matter. I did like it because it is “RF Quiet” and there is little to no RF noise except when certain cars drive by that are a little noisy.

I used my field expedient sealing technique again today, I know this is not a real seal but it will shed water long enough for me to complete my activation and then I can break it down and stow it in the truck easily enough. Long term would be a different story, but it works well for me like this for simple short time frames like a POTA activation.

This time since I was going to stay on 20 meters, I simply deployed the two radials that are associated with that band and I ran them at right angles just to see how it would perform, it looked great on the nanoVNA with the SWR running about 1.2:1 across the digital portion of the band.

I meant to get a photo of the waterfall and somehow ended up with an image of the transmit signal and associated info…figures. The point was going to be that the 20 meter section of FT8 was filled with ops today. So much so that is was hard to find a spot to send from. The band segment was that tightly packed today. I had to frequently move as I would go for several cycles with out so much as a hint of someone answering me only to find out that a strong station had setup on top of me and was sending over my little 20 watts. Get a contact, listen to the band a minute and find a new clear spot and repeat. This was the modus operandi for the day. I considered at one point of moving up to 15 meters just so I could more easily find band space, but talked myself out of it since I didn’t want to get out in the rain and change antennas and then worry with the tune of the radials and such.

After getting my minimum of ten contacts on FT8 thereby securing the activation, I wanted one more just so I could have a little buffer if one was a pirate of some such. Turned out that this was a huge problem as it took me a long time to get that last QSO in the log, I even went over to CW thinking it would be easier (which it was not) and finally got that last station… The QSB (signal fading in an out) was so bad that I could almost not hear strong stations that were normally easy to copy, but I did get the one I wanted before going QRT for the day. I grabbed the photo below to show the band fade and it is kinda visible in the signal on the lower edge of the waterfall, but it would go from what I would call S9 to nothing in literally 5 seconds, they signal would just vanish. I was blown away with how bad it was and then I checked the space weather and saw why, there is a ton of solar activity causing terrible band conditions right now…figures.

11 contacts in almost an hour is not a great hit rate for me where I am used to working about 1 CW contact a minute and a FT8 every two to 3 minutes, but it was fun none the less. Any day I can get out and do POTA is a good day. Until next week…

73

WK4DS

Triple mode activation at US-2169 with 2 radios!

Today was a good day for POTA as I was able to get contacts with 3 different modes in a single activation. Did I mention it rained too?

So today saw the deployment of so many hard shell cases to the park. I went ahead and staged both radios in the truck cab so if it started raining (which it did) I could have access to both radios anyway without having to get outside in the rain. Today saw me use the sBitx V3 as well as the Ten Tec Scout 555 Amateur Transceiver. I like Ten Tec radios when it comes to CW so I wanted the Scout for this mode. I forgot though that I have not outfitted this radio with an external keyer like I did the Argonaut 5. So with the Argonaut still tucked away in the bed of the truck, I just decided to send everything today by hand.

As you can see in the photo below, I ran the hamsticks so I could stay dry inside the truck if it started raining… seems today that was a good call. I only put out the 20 meter radials and the 20 meter ham stick. I thought about hopping on 15 meters for a little bit but the closer the rain clouds got the less I wanted to be handling lightening rods…. I mean, antennas in these conditions.

I checked it with the nanoVNA and the shape of the curve today was such that the CW portion was really well centered and was 1.1:1 on SWR with the chart climbing to 2:1 at the upper band edge. This was completely usable so I didnt bother to tune anything further and just got on the air…and by “tune” I mean “moving the radials around till the SWR plot moves to where I want it in the frequency spectrum”…lol. I can push and pull the SWR null on the VNA by changing the location of the radials in relation to the truck. I am assuming that I am simply tinkering with the capacitance and inductance of the radials as compared to the antenna and it allows me to correct for things…most of the time.

I first worked a few SSB stations before giving up and heading down to the CW portion of the band to see what I could find down there. Seems there was plenty to find as once I setup on frequency and called CQ a couple of times, I had a nice little pileup that lasted for about 15 minutes straight. I was able to work 15 contacts in that time as well. For me, this is “efficient” CW and really fun.

SSB seemed to be thin on stations today and the band was not really happy with this mode, I struggled to get just 5 contacts in the log today on this mode and normally it is much easier to land many more contacts here with the 50 watts that I was able to use. Maybe I bumped my mic gain and had it turned down or something, I just wasn’t getting any takers on SSB for some reason…

The Ten Tec Scout 555 is almost the perfect POTA radio in my book. It needs a nice brick wall IF crystal filter in my opinion, to be fair, as nearby stations would bleed in on the QSO with their energy sometimes. I could tighten up the IF filter width, but the stations would still numb the receiver occasionally and I think a nice 500hz 8 pole crystal filter would be pretty sweet here to solve that… I am looking at a nice audio filter but who knows…I might just try making an IF filter myself at some point. Once I had cleared the pile up I put away the Ten Tec Scout 555 and deployed the HF Signals sBitx V3 (mine is actually a V2 but I have performed the V3 update so going forward I am going to call it a V3)

The only mode I used the sBitx on today was FT8. I wanted to work a few FT8 contacts as well and had synced the time with the internet prior to leaving the house today so I knew it would be good to go. Boy did it deliver on the promise of getting me some FT8 contacts! Once again I stayed on 20 meters and just ran with it as I am also a little bit lazy at times and this was an easy win for me...haha.

I really like the layout and implementation of the sBitx. It is a really fun little radio. Although this radio is missing some stuff inside but that it what makes it so economical too. Things that some people might call “nonnegotiable” like shielding between the RF and computer sections… but I digress. It works for me even with the little rough around the edges stuff here and there.

Now, below is what the sky started looking like by the time I finished playing with CW and decided to get on with FT8. It was scary dark and ominous and then the rain started to fall. I really didn’t mind the rain as I had taped up the coax connection on the antenna and was confident it wouldn’t give me any trouble. What I didn’t factor in was the lightening…

Well, the rain fell and got more intense and more intense as I happily worked FT8 on 20 meters. After a few minutes, the waterfall on the radio exhibited a strange phenomenon. It turned yellow and red (the colors representing the strongest signals)… the whole thing was showing a 599 +30dB signal that covered the entire segment of 20 meters I was watching. This happened to be 6khz of spectrum on the waterfall and at first I thought something was wrong with the radio. Turns out, the radio is fine, this is simply what happens when the atmosphere charges up with static right before a lightening strike! I noticed after a couple of cycles that I would hear thunder off in the distance and then the waterfall would return to normal and slowly start to turn yellow and red again, till I would hear thunder and the cycle would repeat. This was fascinating to say the least, what was more intriguing though was that I continued to make contacts with that much band noise in play. FT8 is a true weak signal mode if I ever saw one.

This is what I am speculating is static charge up in the atmosphere in the photo above of the FT8 waterfall. For those that dont know, this mode does a sort of “talk and listen” thing where your radio sends a message for 15 seconds, the listens for 15 seconds for the other station. So the waterfall wont display anything while I am transmitting since the receiver is turned off. You can see that the cycle right before I sent and how the band was fine and then I send for 15 seconds and then when I go back to listen again, the band is filled with noise.

Let’s shift gears for a minute, the internet is an amazing place. I made this contact at 16:53 UTC and got this email notification just a few minutes later. That is pretty awesome to be honest about it. I remember mailing cards and it might take a month to get one back…

After I finished the activation and waited on the storm to pass, I wanted to do a simple test of the sBitx for a ham that had sent an email asking about the sBitx and how bad were the “birdies” on any given band. I dialed through the 20 meter CW portion up the the FT8 region (14.074mhz) and found what is noted below. In the above photo, you can see the strongest birdie I encountered on this band. That color means it is quite strong in signal level, so if a station was on that frequency, you would not hear it.

I noticed some were strong but they are also very localized. Literally only 200hz wide at the most. I don’t know if this is really band or not, but there were 4 distinct birdies in just the CW portion of the band. If you were worried about this before and didn’t want to have buyers remorse later, then consider me “taking one for the team” as I didn’t have this intel before. I can still recommend this radio for field expedient FT8 and POTA activations as it just works. Sometimes it will ignore a reply to your CQ on FT8 so you have to pay attention to the display on each cycle, but it mostly catches them.

Something I have learned about propagation is that the three modes I am using carry different levels of signal quality to make them effective. SSB (single side band for the newcomer) takes the award for needing the best band conditions of my three regular POTA modes. If the bands wont allow SSB to work or all the stations are “down in the noise” then I move to CW which requires much less propagation to work for me (especially with a good receiver). BUT it pales in comparison to FT8 when it comes to signal to noise ratio. I am blown away that when CW contacts are fading in and out and are in the noise floor that FT8 will be active and I can easily make contacts with it.

This is a day when SSB was “in the mud” but CW was rocking and rolling and had it been in poor shape, I would have went to FT8 for my ten before quitting and going to lunch. Lol

73 - WK4DS

Raccoon creek WMA POTA with the sBitx V3 SDR transceiver

Today saw me head over to Alabama to activate a nearby park that I have never been to before. Us-9875 Raccoon Creek Wildlife Management Area is a beautiful place right on the Tennessee river between Stevenson Alabama and Flat Rock Alabama.

I drive over to the WMA and find no one there at all, this is awesome as I like it when I have the place to myself. It gives me the freedom to setup the radio anywhere or in any manner I choose without having to worry about people walking into the radials or anything like that. Well, I get there and promptly decide to setup on 20 meters as I wanted to not spend a lot of time today activating as I wanted to also record a YouTube video for our brand new channel about amateur radio as well as have time to enter and upload the log from today and edit the video once I got back home.

If you want to see the video I made when I did this activation, the link is here. I didn’t film the whole activation, but rather pulled segments in and just did some of it, so you might be in it and you might not…lol. If people want the whole activation recorded in all it’s lengthy glory, I am not opposed to doing that, but I will need to hear that from the people…

When I want to do FT8 in the field I always grab this radio. The sBitx V3 is an SDR that is built around a Raspberry Pi SBC and uses a touchscreen for most functions. It only has two input devices on the radio, the VFO knob which never changes and the multi-function knob which literally can be used to adjust everything else…literally. It does have ports for a CW key, headphones, and a microphone on the side right above the power switch too. Since it uses a RPi4, it can be driven with a mouse and keyboard and during this activation I use the mouse to select FT8 stations to call. It is really handy for that. I find that if I am simply entering a call sign to chase on FT* I can use the built in keyboard instead of taking a separate keyboard. Another thing it has is Bluetooth, so Bluetooth devices will work on it too…such as a keyboard… I really like this radio if you have not figured that out yet.

Propagation was all over the place today as you can see on the beacon report above that I was weak at -19dB into “3” land but just a half hour earlier I was able to work JI3MJK in Japan! That is almost 7000 miles away!!! So if your activating and it seems like no one can hear you and you are about to give up, I would recommend that you give it another half hour, if possible, as the system might flip in your favor! That is what happened today.

I grabbed this photo below of the screen during boot up, it shows the OS version which is JJ’s 64 bit version 3.025 and that it knows who I am and where I have set the GRID to. This is important if you are doing POTA as you need to communicate that when you work FT8 at some distant location. The FT8 community is really into grids and want to collect them all…so pay attention to your grid. It is also showing the FT8 stations as they come in as well below that in green letters. Fortunately, it is really easy to change the grid on the sBitx so you dont have to worry too much about it.

So I setup in the truck and to be honest about it, I am really starting to like this concept. I am in the shade for the most part, if I am running FT8 only, I can run the engine and have AIR CONDITIONING at my POTA operation!!! Can we say WINNING!!! Ha Ha… I have done that once so far when I was in Florida if memory serves me but I would have to check. Using CW is a little tougher though. The diesel engine is loud enough to make copy of weak stations really hard so I don’t run it if I am working CW.

I normally try to work some CW though as I really love the mode so I normally will roll down all the windows in the summer and put my windshield sun protector in the window and work a bunch of those CW ops if the bands permit it.

A neat little addendum to the sBitx radio is that since it is driven by a Raspberry Pi 4, it can use a mouse and keyboard if you prefer it. Supposedly it has keyboard CW character generation too, but I have not attempted to do that yet. So if you are not able to send very well, this might be a solution for you. The mouse makes it much easier to choose stations that are calling CQ so you can pick them out on your end and you are not obligated to just call and answer CQ calls yourself. Farhan put a lot of thought into this radio and it shows.

Here is a little discussed subject…extra gear. I know we all take it with us but what do you normally carry with you when you go into the field? I have done POTA long enough now that I have sorted it out to just what I need and some redundant spares of failure prone items. Things like extra coax and another antenna are always in the spare tote.

The location that I setup at did have a really nice view of the river. This location is right next to the John Snodgrass bridge. This is the bridge over the river for Alabama Highway 117 to Stevenson.

As you can see from the logbook, there was a great run on 20 meters CW then another great run on FT8 as well! I even netted a J call on FT8! What a great day to do radio and the weather was great to boot.

Dual POTA activations US-0716

This park is the second nearest park to me past US-2169. Since it is a further drive, I tend to not activate it as much. This weekend I was able to actually activate it in both states in two consecutive days.

As you can see above, the band was really active on CW as well as FT8 on this day at Eagle’s Nest and I made quite a few contacts in the mid afternoon here. When I setup here, I am right on the edge of the road so I have a lot of road noise to contend with here. I ended up going to earphones when I operated CW just so I could hear when cars would go by. That was OK though as I could hear plenty well enough to get a bunch of QSOs in the log before switching over to FT8 for a while.

Yours truly next to the sign for this location and the below picture shows where the truck is located in comparison to the road as viewed from the sign. There is an upper parking area too but the spot where I parked today is fully inside the park so I simply setup here if I don’t have a lot of time.

I quickly ran the radials out into the weeds and checked the antenna system on the nanoVNA and it was close enough to use (I think it was 1.5:1 SWR or something near that). I really thought I would simply get 12 QSOs in the log and move on today as the bands have not really been the best lately, but that was not what happened at all!

Getting on FT8 after a strong run on the CW portion of the band was fun as well! I am really starting to enjoy this whole concept of multiple modes in a single activation.

The next day saw me wanting to activate the Georgia side of the park as I again had some free time in the afternoon. Well, let’s do it then. I strike out to the battlefield and when I get there, my usual spot is completely clear! I am stoked! I back into the tiny parking lot (it only has two spaces for some reason) and get the radio setup in short order. Well, this is where the problems start. I power up the radio and there is this broadband noise that is wiping out the band now! I investigate it for a minute and realize they have one of those huge temporary LED road signs setup across the road. This has to be the problem because there is literally nothing in any direction for over a mile easily. Well drat. I decide to expediently break down the radio to the point that the radials are rolled up and laid in the truck bed and the antenna is just stuck in the bed with the radials and I left the antenna mount on the truck hitch.

This is the culprit as best as I can tell. It is the only thing that was in the area for probably a mile in any direction that was not there the last time I activated this spot. Have any of you ever had this sort of problem with these signs?

So I move down the road about a mile or so and then take a side road out to a pull off next to a field with a bunch of monuments in it and as a bonus, it was also in the shade! These bicycles were about the loudest thing to go by while I was there too. A couple of cars did go by, but they go MUCH slower on this little one lane road since it also has the bicyclers to watch out for.

Getting to operate in the shade is kind of a special thing for me as I dont usually have a setup that allows for that.

And this is what the band scope looked like with me in a new location. Nice and quiet. There was a disturbance in the bands today though as I had a K index of 3 and it was not near as easy to get enough contacts today as it was the day before on the ham radio… In the photo I am working AF4DN on FT8 on the sBitx V3 and it was about to dry up for FT8 contacts.

Once I finished the FT8 portion of the activation, I wanted to use the Ten Tec Argonaut V radio so I switched them out and got it on the air. In the photo you can see that I was on 14.050 mhz, but the logbook shows 14.051 mhz. This because I was calling CQ and after a couple of minutes I heard someone tune up on my frequency and then they started calling CQ… Rather than get upset, I simply spun the dial a little, called QRL (Is the Frequency in use?), and then started calling CQ again. It took a while but I finally worked a half a dozen contacts on CW and at that point I had cleared all the callers I could hear and decided to go QRT and get something to eat.

This is one thing about the Argonaut V that I really like. This radio has a good ole S meter! I love to have a real meter movement if it is feasible to do so. Several of my radios do not have this features and I miss it. My old Ten Tec Omni 6+ and my Ten Tec Omni 7 both have S meters, although the Omni 7 has a digital bar-graph style on the digital display and not a physical meter, it is still there and does give you some sort of indication of the signal strength.

The operating position is starting to get very comfortable to be quite honest about it. I am starting to like operating from the truck more and more. The first year I worked many of my activations from a picnic table in the park and I had to carry all my stuff across the park to the table and back every time. This was not too bad, but it sure is convenient when you can simply setup in the truck cab in just minutes and I can even operate in the rain in this position without much problem, so rainy day activations are a thing for me now.

Two things of note about these last two photos that are of interest to me and maybe you too. The first one is that I have worked W7RF (#14 in the logbook) and this might not mean anything to you, but he is the inventor of the keyer I was using in this activation! He owns Hamgadgets.com and I love his Picokeyer CW memory keyers! I thought I recognized his call and when I ran it through QRZ, I knew I have to email him and send him a photo. he wrote me back and we had a great little exchange over it, turns out he is an avid POTA hunter as well as many other things. I count it as special to have him in my log. The bottom photo shows the parking lot I was at when I started this blog post today. It is also where I apparently left my storage case for my radials with half of the radials and ground weights still in it! I went to breakdown the system at the other location and could not find the storage case. So I packed it up and drove back over to the original spot and there it was, still sitting in the grass right where I left it… What a day.

Testing the DROK 5 volt regulator for the sbitx V2/V3 Amateur Transceiver

Tests were done today and the results are in… the DROK adjustable voltage regulator is a clear winner in my sBitx V3 radio. This is a simple multi-choice voltage regulator circuit that can be used on a whole host of applications. That row of SMD resistors across the top is for fixed voltage applications and then there is a small potentiometer in the upper corner for the variable voltage applications. I just dialed the potentiometer down to 5VDC and called it good… Let’s take a look at what I found today when I compared the results of the old voltage regulator to the new DROK regulator on the oscilloscope.

When you buy these little power supply circuits, they come attached to each other and you simple pop one off to get it out to use it. So I broke one off the set and soldered a set of header pins into it and then connected it to my homebrew variable bench power supply, then also to my HP 8840A/AF bench multi-meter and my Siglent Technologies SDS1202X Oscilloscope. This allowed me to vary the voltage applied to the input and to measure the output voltage as well as see what the quality of the output voltage looked like. Now, to be fair, I didn’t load either the original unit or the new one, this is simply static voltage output being viewed for cleanliness.

The below photo shows how it looks on the workbench when you have a power supply, a scope and a multi-meter all connected at once to a tiny little circuit board…haha.

I first connected the old one to see what it looked like on the scope and to be honest, it didnt look too bad at 13.8VDC. It has some noise on it, but it was not too bad. But then I thought, “You know, my truck power port is more like 12.4VDC so lets lower the input voltage and see what the waveform and output voltages look like. This is where things got real interesting. I found that the noise was akin to a sort of high frequency ringing and the scope could not get a clean trigger on it. So instead I turned on the persistence mode and then set it to a 1 second decay rate so it would build up on the screen and this gave me the visual that I could share that is relatable.

All of the input (13.8 to 12VDC) voltage adjustments that I did only changed the output a few milli-volts, it was so little change that I didn’t even bother recording it. I adjusted the output till I was at 5.0872 volts, this is only a 1.7% variation from 5 volts so I figured I would be good to go here. The original was off by more and it worked too, so there is also that.

The first photo of the oscilloscope screen is from the new DROK voltage regulator showing the output from the new board. The variation is less than 80mV as you can see the cursors are not right down on the waveform, so I figured it was close enough for what I was doing. Might have been 75mV if I had gotten really close… Adding the persistence to the waveform allowed it to fill the screen and gave me a bar I could more easily measure.

Below is the original voltage regulator with the supply voltage at 13.8VDC. I was intrigued by the fact that a higher supply voltage made the device work better. So my Astron RS-35M power supply was making it work better in the shack where I was trying to recreate the problem from when it was in the truck…lol. You can see how the wave form has grown with all the signals below the main area of concentrated garbage. With a 1 second decay rate the old wave forms would fade out after 1 second so it would not simply fill the screen with a yellow bar. I really like these new oscilloscope features. These are all in the megahertz frequency range too…

Below is what the old regulator looked like with the voltage reduced to 12VDC. Look at all that RF hash! What a terrible DC waveform… It has completely filled in the 1 second decay rate with trash. This measures about 137mV so if you do the simple math of 75mV and 137Mv you come up with about 50% reduction in RF hash on the 5VDC bus. That is a solid 3dB of noise that I removed or in ham speak a full S unit…(At least that is how I understand it). That is a pretty significant amount in my book and I for one am glad the email group found these devices and shared it with the rest of us.

I call this a win. If you have an sBitx V2 or V3, this is a worthy upgrade and it really is quite simple to install. You have to solder in some header pins (you can recover the ones in the old voltage regulator if you don’t have new ones like I had today) and simply plug it into the header on the main board and your done. Remove a few screws, unplug a few connectors, solder in four pins, unplug the old and plug in the new, reconnect the plugs (they are all different so you can’t put them back wrong) and put back the 6 or so screws and your done. Literally 20 minutes start to finish. I wished I had done it sooner knowing what I know now, I have had my DROK boards for a couple of weeks at this point…so sad… You can get them from Amazon for real reasonable money too. here is the link to Amazon if you want to get some for yourself.

Link to DROK mini regulators

POTA on the 4th of July…hold for second operator.

Today I went for a morning POTA activation at US-2169 and on my way over to the park, I gave KG4WBI (Roger) a call and invited him to join me. He agreed and after a little while of my working some CW on 15 meters, he arrived with a thermos of coffee and an eagerness to make some contacts!

Since I was ahead of him, I went ahead and setup the station complete with a full compliment of radials so I could use any band I wanted (of the 5 I have hamsticks for at this time...) and got it tuned up on 15 meters by making a slight adjustment to one of the radials. As you can see, I chose the usual spot for today’s activation. This was on purpose as I knew the lower area (which is actually where I kind of wanted to go, to be honest) was really busy with holiday traffic. This also meant that there would be more RF noise down there from inverters in the campground and such too.

This upper parking lot doesn’t see near as much traffic so I knew that it would be a much quieter RF environment. Sometimes you just have to choose between comfort (the lower area is in the shade under a bunch of old growth trees) and a quieter location so I could hear better. I chose to hear better since I knew Roger was coming. It wasn’t too bad, but it did get fairly hot towards the end of the activation to be honest about it.

With the antenna strung up and adjusted, I need to choose a radio. The radio turned out to be the Ten Tec Scout 555 because of the power output on SSB(50 watts). I knew we would be using SSB today and wanted to be able to make a bunch of contacts with it since Roger was going to be there as I am secretly addicting him to POTA a little at a time…hehehe. It worked as we operated together while he was there and I made sure he got enough contacts to get his first activation from US-2169. Now to get him an account and to upload his first log so all the hunters will get credit for his contacts too.

The Scout is a really great POTA rig as it has minimal controls on the front to the point that it has what you need and nothing else to be honest about it. It needs a couple more in my opinion and I may just get another one to build into something fun with some more front panel controls on it. But for now, this one works perfectly and I don’t want to risk killing it as I use it as my SSB POTA machine now. Before this one I had only made a handful of SSB contacts at parks and now I have dozens in the time since purchasing this radio. I really love the compact nature of the radio to be honest, I compare it to my Argonaut 5 in usability with more RF output…

Here is another insider tip…You can connect the CW key and the microphone at the same time, this doesn’t seem unusual till you find out there is no mode switch to go between these two modes. You simply start keying CW on the key and it will transmit CW, and then you can key the microphone and transmit SSB in the next moment with no other interaction with the radio other than picking up the microphone. This is really awesome, but it comes with a caveat. The radio is transmitting CW on the SSB mode. This means that you have to adjust the frequency off from the desired frequency by the amount of the side tone, which is about 700 hertz. On top of that, you also have to shift the radio opposite of the sideband direction you are using. So if your on 40 meters, then you have to be 700hz above the desired frequency and if your on 15 meters, then you have to be 700hz below the frequency. This took me a little bit to figure out too as I am used to being able to simply dial the frequency and call it good. So in the photo below, I am actually on 21.042mhz… As the radio warmed up, it shifted in frequency a little. This is why it is important to do two things, let the radio warm up before getting on the air and look at the display from time to time to confirm things have not changed.

What is nice about taking a pile of pelican style cases (none of them are actually pelican cases) is that you can have a ton of extra gear with you so if something goes awry, you have spares. Another thing that happens is you will have access to your favorite hardware like my N3ZN cw key! So I get it out of the case for the Argonaut 5, which is where I store it normally and use it for this activation. The Scout has two key inputs on the back, one if for a straight key and the other is for a paddle. Well, if I use my Picokeyer, then it goes into the straight key input. The paddle input is fed to a Curtis keyer chip and that is built into the radio. The only downside to this keyer, which works beautifully BTW, is that it does’t have memories. I like having memories for POTA as you end up sending some information A LOT and it takes some of the sending burden off of me so I can log and check the radio and such. Turning the page on the log book seems to be a good reason to use memories on the keyer too… lol. If you have the need for a dead simple CW memory keyer, I can recommend the Hamgadgets Picokeyer VERY HIGHLY, it works flawlessly and runs what seems like forever on a single coin cell battery. I am closing in on a year for this one and it is showing no signs of needing a battery yet…

No matter how many radios you take though, if you forget your log book, you will end up logging in your journal…like I did today. I luckily took my journal with me as I like to make notes about all sorts of stuff while I am out and this is another good reason to have it. This is not the first time I have defaulted to this notebook either, it has bailed me out more than once…lol. I did have plenty of pens though so that wasn’t a problem.

Since I got there before Roger, I built the radio out and hopped on 15 meters CW and started calling CW POTA and got some really interesting answers to that call! I worked a station in the UK as well as Germany! The Hamstick is not the worst antenna out there is what I have some to understand. If conditions are not too bad, I can easily work Europe and South America on 15 meters above. Today was no different. I was able to get a couple of DX stations as well as K2E special event station!

Once Roger arrived we switched over to SSB and attempted to make some contacts first on 15 meters, and then 17 meters with literally zero answers on SSB. You see, Roger is still working on his code so he prefers SSB at this time for things like this. So rather than frustrate him with having to listen to code he is struggling with, I opted to set the hook deep and get on SSB.

I think my idea worked, he was really stoked to work so many ops in such a short time. We had a blast and everyone was super nice while we bumbled around handing the mic back and fourth. It was hilarious at times, but we had fun so I am happy. It happened so fast that I had to come up with some really fast shorthand to know which calls we had given “Two Op status” to and which ones I worked by myself. Plus the notebook was also the wrong one and the calls were happening so much faster on SSB, the notebook is a mess.

I can honestly say that taking a second op along to do multi-op POTA is really fun and if you have not done it yet, consider giving it a shot sometime.

The below photo shows you what it looks like to make sure you are hydrated on these hot summer days in Georgia. I have a Nalgene bottle which I am using first since it is not insulated and then a Hydra-flask which is insulated and makes for cool water even when it is burning hot outside of the bottle. On top of that we were drinking coffee while there too, that is just silly if you think about it…

This is the messiest logbook I think I have ever created. Notes just scribbled here and there, edits run roughshod through out the 5 pages, and you can see that it means we had a great 4th of July activation. Thank you to all the hunters that came out to support us on the air and I look forward to recreating something like this again in the near future.

73

David - WK4DS

Dual radio POTA activation? Sure!

Today I setup both the Ten Tec Argonaut V as well as the sBitx V3. This was because i was not sure if the sBitx V3 would hold up the entire time. You see, it has had an ailing 5 volt regulator for a while and I was planning on replacing it later today, but first… POTA!

So I go to US-2169 and setup in my usual spot and get out both radios so that I can work CW on the Ten Tec if the sBitx flakes out on me. It didn’t, but since I had already gotten it out, I used the Ten Tec Argonaut V anyway and worked what CW I could with it. You see, today was another day that I stayed above 20 meters the entire time. That was the plan from the outset and it was quite successful too. I love using 15 meters in particular since it goes over seas easily for me. I will usually work several DX stations if the band is open and today is no exception. I worked 5 DX stations over an 18 minute span of time, not bad for a 15 watt radio… I worked so much FT8 is short order that I almost didn’t need to setup the CW station at all, but I wanted to work some CW anyway so I just got on the air with it and this is how it went.

The operating position was a little crowded today but not too bad, I used the hard case for the Ten Tec Argonaut V as a table of sorts to sit the radios on so I was able to move them back and out of the way of my writing surface. This left plenty of room for the nanoVNA and my other small items I use when activating a park. I have gotten really comfortable with setting up like this, I can set this up in just minutes and it requires zero use of the park infrastructure (such as trees or picnic tables) over the parking space I would consume either way and some space for my radials.

So in a previous blog post I had mentioned that I was going to use the smith chart on the next outing to show how you get way more information about the antenna under test with it instead of the simple SWR graph and here it is. Contained below is the 15 meter plot from 20.5mhz to 21.5mhz and the marker is resting at the upper limit in the photo. The center line across the chart is purely resistive measurements, anything above this line is inductive and anything below this line is capacitive in nature. As you can see on the display, the line representing the span I am looking at, 20.5 to 21.5mhz, is all above the line showing that my antenna system is inductive in nature so it will have some inductive reactance to the signal. The very center of the chart where the smaller circle intersects the line is 50 ohms - resistive (right below the flag from my measurement). As you can seem the further you move away from this point, the further from 50 ohms you get.if it were to be something like 100 ohms, you would need a 4:1 transformer to correct the impedance mismatch, this is why antennas need transformers. The characteristic impedance of the antenna is not usually 50 ohms which is what the transmitter is designed to see.

In the second photo I have switched the chart over to a simple SWR plot versus frequency and you can see how it is easier to read for the lay-person. It does give you the data you need in the firld really quickly and make it easy to know if your antenna is short or long and if your radials are good to go and such. This is what i use most of the time in the field to just make sure the antenna is presenting a good load to the transmitter.

In the above photo I learned something strange about the sBitx today. The two clocks don’t have to be synchronized to work. FT8 is not time forgiving, your radio time marker has to be fairly accurate (within so many milliseconds or maybe a second or two max) or it wont make connection at all with the other stations. As you can see in the lower photo, FT8 worked perfectly and I made several contacts with this mode so the computer clock must not matter at all… I don’t know what is going on here but it works so I dont question it.

Today saw a bunch of DX early on which always makes my day. But all in all it was a great day for POTA and I was stoked to get 21 calls in the log. Until next time, dust off that key or microphone and see if you can get a park or two into the log.

David

Scout…ing for contacts POTA style

Today saw me field a “new-to-me” radio, a Ten Tec Scout 555.

If you have never seen one of these radios, you are not alone. This is a radio that was produced for only about 15 years, towards the end of the company’s life before it changed hands around 10 years ago. It is unique in that it doesn’t contain every band but rather only one at a time. These little modules each contain the special bits to make it work on each band they are designed for and the goal back in the day way to just get the bands that you use. Turned out that these radios quickly formed a cult following and they all wanted the “whole set” of bands for them. I have the whole set of bands thanks to KG4WBI rounding up an 80 meter module and presenting it to me as an early birthday present. Once I had the whole set, I felt this iconic antique needed a better way to travel around when in my truck so I went to Harbor Freight and grabbed an Apache 4800 hard shell case for it. The Ten Tec Scout fits perfectly alongside the set of band modules. I even created a pocket under the radio to store the power cord so I have the whole rig in the case. (The 20 meter module is currently installed in the radio in the below photo)

Today saw me back in the “truck-shack” (I think this is what I am going to start calling this in the future) and setting the radio up on the hard shell case in the passenger seat. Today’s setup was not for power access though as my internal power cord it only fused to 10 amps and the Scout draws that much on transmit normally since it is not user adjustable on the front panel…yet.

I have found a website about the Scout that is a literal treasure trove of information about this radio, mainly in the CW mode, but a wealth of information none the less. I found the website by watching Coastal Waves and Wires video here. The website is by NA5N and is linked here for quick access… His mods for the Scout are pretty extensive an he does a great job of documenting the mods as well as explaining the process the radio uses to transmit and receive and he even has these hand drawn graphics that are amazing.

Back to the activation after chasing a rabbit for a minute…

So today I started on 40 meters as I figured I could make a good many contacts there on SSB, problem is that I have tuned my ham sticks for the CW portion of the band and the 40 meter ham stick is not very broad banded so it really wasn’t going to allow this. What did I do then? Well, I got on CW and made a few contacts before moving up to 20 meters where the antenna is broad banded enough to cover the entire amateur band space.

A couple of noteworthy items here. The 36Ah battery weighs almost nothing but packs a ton of energy. I use it from time to time to power my POTA ops but most of the time it is backup power in my shack for use during power outages and emergency nets and such.

The key I am using today is the Gemini and is a great little collapsible travel key. I had one little problem with it right after buying it due to the center post working loose but other than that it has been flawless. Great portable CW key if your wondering.

The antenna setup is as follows, hamstick riser, hamstick in QD socket, then several radials to form a counterpoise. I have taken to running one or two LONG radial now to play with how they interact with the hamstick antennas and so far it has been interesting to say the least.I found that on 40 meters, if the long radials were pulled taught, (I “anchor” them with a simple weight so I dont need tent stakes) that the resonant point would be well under 7.000mhz, but if I pulled just enough slack in them that they laid on the ground all the way except the first 8 feet from the antenna. Imagine gently curving down to the ground about 7’ from the yellow antenna riser then laying on the grass the rest of the way out. This moved the resonant center value up into the CW portion of the 40 meter band.

The point here is that the length and position of your radial field is absoloutly critical to your antenna system as a whole. The more I play with these radials, the more I learn about how they interact with the system and how important it is to measure your antenna prior to starting your activation if you build it on site.

In the photo below you can see how the radials were setup for the 20 meter band.

Remember at the beginning of this story where I mentioned “ominous” clouds? Well, here is a photo of them to show you what I meant. That looks like rain to me, I did get by without getting rained on before finishing, but that looks EXACTLY like the kind of clouds that bring rain to my area of operation.

Some thoughts on the logbook from today. I have gotten very comfortable with paper logging in the field and then transcribing at home. I did it today actually and it was fine…for the most part. But there was a couple of times when I needed a helper to log for me when I was working SSB. SSB happens so much faster than CW does for me that I was struggling to keep up with the log.

If you will notice in my other posts, I will number the QSOs and even write out the time on the FT8 QSOs as they are pretty slow to complete for me. But once I moved to 20 meters today and jumped on the air with more than 17 watts, things got sporty! I literally stopped writing line numbers, abbreviated most of the time stamps and even left out some of the states just to keep up! It was madness! I could not believe how much more your signal gets out with that minimal amount of power increase. It was a blessing and a curse at the same time, I now see why people will computer log in the field and have a helper to log for them so they can keep up. I could have easily worked 100 QSOs without trying hard if I had just stayed longer at the park. The SSB portion was on fire! The CW portion was doing fine too, but there were SO many more ops on SSB on this day…so many more… In the end, I had a great time and even worked my buddy Roger KG4WBI, this has to be my closest 20 meter contact for POTA ever. If I measured it right we were 2.9 miles apart. LOL What a great day to be on the air!

73

WK4DS

Classic CW Activation!!! Ten Tec Argonaut V for the win!

I don’t know if you have a favorite radio or not, but I do. The Ten Tec Argonaut V is one of my all time favorite portable CW rigs and for good reason! This radio brings all that is CW and Ten Tec together in the perfect combination of fun and ease of use.

Of course, this radio also has several other modes (although I could not tell you all of them as I have never switched it off of CW) but it will do other modes as well. All that said, it is a wonderful little CW machine and the ergonomics for use with CW show through in the design of the radio. From the minimalist layout to the proper location of critical operating controls, this radio is just about perfect. The only other thing that would make this radio even better would be the inclusion of Collins mechanical filters in the IF..but I digress… (Giving a quick nod to my Omni 7).

You see, when you’re activating a park with a small CW radio, you only need a few controls to be able to work the contacts coming in. The main two being the RIT for stations that are off your beat frequency by more than is comfortable (I had one of these today) and the filter bandwidth adjustment. These are the same knob on the Argonaut 5 and it is a simple button press to switch between these two functions. Another point to consider is these buttons are grouped near each other too so you are not searching all over the radio for the controls you need to work your activation. Along with these two controls the only other one I use while activating is the volume to bring down strong signals and it is also right next to the other controls, keeping the process really clean for me. Honestly the radio seems to be laid out with the “set-n-forget” stuff on the left side and the “active-use-while-operating” controls on the right now that I look at it.

Enough of me gushing on about the radio, we all know that I love this little machine…So onto the key and keyer. The key is my N3ZN travel key and it is fed into a HamGadgets Picokeyer both which are wonderful devices and work exceedingly well with the Ten Tec Argonaut V amateur radio. It has been a while since I have used the Hamgadgets Picokeyer so I had to get out the owners manual to see how to change one of the settings. Taking copies of the manuals is something I am a huge proponent of as it just makes sense. Without this book I would have been searching online, and sometimes that is not available at a park. The paper book never has a “dead battery” and is always ready to serve you. Take copies of the books with you…

A good cup of coffee is crucial to a good activation!

I went to my old haunt today US-2169 to get on the air and work some CW contacts as the space weather showed that the sun was still being friendly. I get to the park and find that it is starting to rain so I hurriedly setup my hamstick for 20 meters (I didn’t want to change bands alot with it raining…) and threw some electrical tape on the coax connector for a temporary rain jacket and got back in the truck. Pro-tip about electrical tape, turn it around backwards with the sticky side out and twist the end of the tape so it is easy to grab and unwind later if you don’t want the adhesive sticking to your parts. Things like the putting it on the coax connector as a temporarily rain shield is the perfect application for this idea. When you are done just unwind the tape and put it in the trash.

I had setup a new radial field design today as an experiment to see if adding a really long radial would work (or even help) and was pleasantly surprised to find it did! I really love using the nanoVNA to measure my antenna instead of a simple SWR meter, even though today I used the SWR function instead of the smith chart.

The power of the smith chart can not be overstated either. What you get to see on the smith chart is the data that the SWR plot shows (well, it shows the impedance and you have to know a little math to turn it into SWR) and is also shows you if your system is capacitive, inductive or purely resistive (the best option if you get to pick). Now this doesn’t mean your signal is going to get out to some distant DX station super well just because the SWR is 1:1, but your transceiver wont have to deal with reflected signals coming back down the line out of phase with the transmitted signal. I was a ham for way to long before I learned the power of the smith chart…and I have just scratched the surface of what can be done with it. All that to say that 1.061:1 is a great SWR for a field deployed antenna…lol

Just for fun I decided to look and see what the SSB segment would be since I tuned this antenna to center frequency on the CW portion and it is still good in this configuration. Dont let any SWR reading below 2:1 scare you, all radios are designed to be able to work into at least that much SWR as EEs (Electrical Engineers - the guys who actually design radios) know that these devices are going to end up in not-so-perfect applications and want them to work anyway.

The measurements, roughly, for these radials are 14’6” and 26’ respectively and they are laid out with the shorter one being 90 degrees to the truck. This is the position that I tuned the antenna at, with this radial as well as it’s mate running out the other side 180 degrees out from this one.

The 26’ radial is run pretty much away from the truck to the rear and it gets the benefit of running down the slope too. This angle adjusts the impedance of the antenna by changing the reactance. This is why discone antennas have the ground plane at 45 degrees sloping down, it presents a near perfect impedance to the transceiver. I will repeat this setup on my next trip and put the smith chart on it to see what it says about the system, I am curious to know now…

I keep this Ultra Picokeyer from Hamgadgets and the N3ZN portable CW key with the Argonaut V so every time I use this radio, I will have a memory keyer and nice paddle to operate it with. It had been a hot minute since I had used the Ultra Picokeyer so I needed to get the manual out for it. Seems for some reason last time I used it, I had enabled the internal tone (for use as a practice oscillator) and wanted to silence it for the activation. I knew how to get into the menu, but I didn’t remember the item name specifically, so out comes the book…

I can not stress how important it is to me to have the manuals to the devices I am using, stored with the kit. The only exception is when the device is so simple and intuitive that you don’t need one anyway (like with the Penntek TR-35 transceiver). So I keep home-made copies of manuals to both the Ultra Picokeyer and the Ten Tec Argonaut V transceiver in the hard shell case with them. They have saved me a couple of times already. Me and my friend KG4WBI (Roger) have this obsession with printing the manuals and then building them into these term paper booklets so we will have them later, I have so many manuals at this point, I have manuals for radios I no longer own…lol.

The 20 meter band was actually really good today. There is supposed to be significant solar problems right now as a problematic sunspot is pointing our way but I was graced with a little time to get on the air and was greeted with quite a few hunters to my surprise! As you can see in the beacon report below I was getting into New Hampshire quite well!

Some observations from today that I noticed were that I was getting states that I shouldn’t have been hearing… States like Alabama, North Carolina and even GEORGIA! I don’t ever get this kind of NVIS operation on 20 meters, I usually have to go to 40 meters to see this sort of thing happen.

Another thing was I was getting some pretty heavy QSB (fading of the signal) at times as well. The QSB even seemed to come and go which was normal to be honest for this sort of thing, but what made it unusual for me today was how deep it was. 599 signals would just disappear for 2 seconds the fade back in. Deep…

Fortunately I was able to get all the information for my log. There was a significant amount of US ops only on this day too. I figured there would be a few more Canadians as well but I only worked one on this day . It is always great to get some of our friends to the North in the log.

The diversity in the log spread today can not be understated. I was blown away with all those southern states coming back to me. Strange conditions for sure, maybe the new radial idea improved NVIS, maybe they have always been able to hear me and when I would activate there just wasn’t anyone hunting… I don’t know, but today they were there and I was stoked! Thanks for coming along and I hope to see you in the comments below.

WK4DS