Many thanks to Mike (KE8PTX) who shares the following:
The search for the best portable speaker for ham radio.
Welcome to the end of my exhausting search for what maybe the best speaker for portable ham radio.
My list of requirements was short: it had to be small, amplified, and have an internal battery.
But most importantly, it had to have a AUX input.
The last requirement shortened the list very quickly. Most speakers today that have any quality of build are lacking in the old fashion AUX connection.
I tried a minimum of six speaker and even tried making one of my own. Rich sound quality was not most important factor to me. Let’s face it: we are not listening to the Beatles.
Now we are going to focus in the two that made the cut. On the bigger side was the JBL Charge 4. Rugged? Yes. Battery life? Great. Size and weight? OK. Take it from the car to the picnic table ok? Yes. Throwing in the pack for a SOTA or a long hike? Not the best choice.
Case is made of aluminum all-around including the speaker grill.
External features are:
power switch,
USB charging port,
micro SD card slot,
and the must-have AUX port for connecting to my KX3.
It also has external rubberized volume control.
For those that may need bluetooth it has that also.
All in all, it is super rugged unit with great battery life and small for my QRP go kit. The only thing that comes in the box is the speaker and usb charging cord.
I hope my findings help others in search of a portable speaker.
Thank you for sharing this, Mike. I’m often asked about the portable speaker I use in the field. It’s a Sony SRS-XB12, but the only good source of them is eBay because they’ve been discontinued for so long.
This Anker speaker seems to be the same size and sport the same features of the Sony, at a slightly lower cost. I’ve also had very good luck with Anker products in the past (I’ve had some of their ear buds and several of their battery banks). In fact, I’ve just ordered this speaker because the battery life is also much better than that of my Sony speakers. I’ll plan to take this to the field and include it in my activation videos–I’ve give the Sony speakers to my daughters.
Because I receive so many tips from readers here on QRPer, I wanted way to share them in a concise newsletter format. To that end, welcome to QRPer Notes, a collection of links to interesting stories and tips making waves in the world of radio!
Adrian Ciuperca (KO8SCA): 3Y0J Presentation to the Northern Illinois DX Association
Many thanks to Eric (WD8RIF) who shares this excellent presentation by Bouvet activator, Adrian (KO8SCA):
Many thanks to Scott Wooten who shares the following announcement via YouTube:
Welcome to the Georgia State Parks on the Air event. Our goal is to have all fifty Georgia State Parks on the air in one weekend. This event is open to all licensed Amateur Radio Operators whether you live in Georgia or not.
There are two ways to participate: Activating or Hunting. Activators fall into two different categories: Single Operator or Club, and there is a special category for Georgia ARES operations.
The first annual 36 hour event kicks off on April 1, 2023 at 1200 Zulu and concludes at 2359 Zulu on April 2, 2023.
If you participate please remember this event is considered a CONTEST, so while casually operating Parks on the Air on the WARC bands is permissible, this event does not allow operations on the WARC bands.
For more information or to sign up as an activator, go to GAPARKS.org
A completely under-prepped SOTA & WWFF activation which turned out to be perfect
In preparation for a tough conversation a good friend once told me: “You know what, just walk into the fire. If you have bad news to deliver, don’t sugar coat it and do it right away. You’ll be fine.”
“Just walk into the fire.” I believe this can be applied to many other situations in life. While I would consider myself to be well-prepared on most trips, hikes and activations and getting a lot of joy out of optimizing my kits I try to stay open-minded. Imagine the things you would miss out on if you wouldn’t be spontaneous or only do things while fully prepared and 100% safe – even if it means taking risks.
The QCX-Mini silently drying after a successful activation
Last Wednesday, I kind of walked into the fire. Not fire as in fire-fire but fire as in Latvian winter storm. In general this wouldn’t be such a big deal had I brought the right clothes, gear and shoes to my short business trip to Riga.
Due to very strict luggage restrictions I could only bring one small backpack for three days. Inside I had enough room for a laptop, washbag, spare clothes and the compact QCX-Mini Kit I built for exactly these occasions. I was wearing sneakers and jeans. At this point I had not planned a specific activation but I wanted at least to be able to operate YL/ & /p maybe 30 minutes from a nearby park – not a problem if you can jump right back into the warm hotel afterwards.
My rental car rocking summer tires in Winter (yes, I was driving veeeeeeery slowly)
During our stay, my schedule for Wednesday morning freed up so I decided to try activating one out of only three SOTA summits in Latvia: YL/YL-003. It turns out this summit is also located within WWFF territory YLFF-0007 about a 1,5h drive from Riga. Big Thanks to Val (YL2SW), Latvia’s WWFF manager, for assisting me with local rules and processing my log. A quick look at the weather forecast showed freezing temperatures, 90% chance of snow, heavy winds and overcast. Many of you will understand why a SOTA&WWFF combo in a rare country could be a small reason not to use the hotel’s sauna on a day like that. Sometimes things just need to get done.
The majestic watchtower on YL/YL-003
I got up early the next morning and was very happy to be able to grab a Bolt rental car from the street and get going quickly. The drive went by without issues up to a point just about 3km away from the mountain (well, 1-pointer hill I should say). The roads were completely covered in snow so I could barely see where I was driving. Latvia is a rather flat country but here it started to get a bit hilly and the tires were certainly not cut out for that. Continue reading CQ From Latvia with Love→
As I mentioned in my recent AX1 vs AX2 video and blog post, I purchased an Elecraft AX2 antenna and bi-pod in late January (note: two days before Elecraft announced their February ’23 sale price! Doh!).
I received the AX2 package a few days later and I was certainly eager to take it to the field.
My first opportunity came on Tuesday, February 14, 2023, when a short activation window opened up in the afternoon.
Zebulon B. Vance Birthplace (K-6856)
One of the first things I noticed after taking the AX2 out of the package is just how solid and compact it is. The AX1 is short, but the AX2 is a few inches shorter because the base is more compact.
Unlike the AX1, the AX2 is a mono band antenna, thus the coil only needs to accommodate one band. When you receive a new AX2, it’s configured for 20 meters out of the box, but the user can modify the coil to work anything from 20 to 6 meters.
“Resonant-ish”
Even though I mentioned this in my AX1 v AX2 article and video, I’d like to reiterate that the AX2 is nearly-resonant on 20 meters. It is not reliably resonant.
I’ve still been receiving a lot of messages from readers stating that their AX2 and AX1 are resonant on 20 meters, so they don’t pack any sort of matching device in their field kit. They simply hook the AX2 up to their little QRP radio and hop on the air.
While it’s true that these antennas may provide an acceptable SWR most of the time, you really can’t rely on a solid, reliable match as you could with an end-fed half-wave.
I’ll repeat what I mention in a previous post:
Small verticals like the AX1 and AX2, that use coils to electrically “lengthen” the antenna, have a higher Q than, say, a large aperture quarter or half wave antenna. In practical terms, this means that the window of resonance is narrow and more fickle than, for example, an end-fed half-wave.
A lot of factors can affect the SWR on higher-Q antennas like the AX1/AX2 including:
the type of terrain,
height off the ground,
length of counterpoise,
configuration of counterpoise,
and, most notably, the operator’s own body capacitance.
You may find that the AX2, for example, is natively resonant on 20 meters at one location, but isn’t at another location. This is quite normal. It’s also the reason why Elecraft states that both antennas are designed to be used with an ATU.
So there you go! If I hook up my AX1 or AX2 to a radio, I’ll always have some means of matching the impedance–either an external ATU, or a capacity hat. You can also tinker with the length of the telescoping whip and counterpoise to tweak the match.
How I found the best antenna for my SOTA/POTA activations
by Thomas (DM1TBE)
Intro
Until January this year I had a German “Klasse E” / CEPT-novice amateur radio license (equivalent to the US General Class), which limits the use of HF to the 10-,15-, 80- and 160-meter bands. When I started with SOTA I used homemade single band end-fed antennas most of the time. However, that is only feasible for the 10- and 15-meter bands.
Unfortunately, both bands are very moody and sometimes they have not worked at all. Unlike the UK for example, FM is uncommon for SOTA in my home association DM (i.e. Germany Low Mountains). You can be lucky and get your 4 QSOs, but I did not want to rely on pure luck.
Therefore, I bought an end-fed half-wave antenna for 10-, 15-, 20-, 40- and 80-meter bands, after some experiments with 10-80-meter end-fed half-wave antennas, from a small German company called ANjo.
Although I could not use the 20- and 40- meter bands at that time, the EFW80-10P (en: auto-translated) antenna gave me the possibility to use the 80-meter band. The antenna could also be tuned for 15. It has a mechanical length of 23.6 m / 77 ft and a coil for the 80-meter band. It is pretty lightweight with 0.4 kg / 14 oz and allows up to 30 watts PEP – more than enough for me. 80-meters is not the best band for daytime SOTA activations, but in 21 months doing SOTA activations, it worked 37 times and tipped the scales for an activation from time to time.
It was sometimes a bit tricky to raise the long wire into the air, but it always worked … better or worse …somehow … like here in the woods along a trail.
In January this year, I upgraded my license and a new world of HF-bands opened for me. Although I have learned a lot about propagation for the exam, I am in favour of a German saying: “The difference between theory and praxis is larger in the praxis than in the theory”. Continue reading How I found the best antenna for my SOTA/POTA activations→
Those of you who know me well know that I don’t have a lot of free time. At this point in my life, I’m a very busy father, husband, son, and hopeless field radio addict. But when George (KJ6VU) asked if I wanted to joint the HRWB crew, it was a no-brainer.
I’ve been a long-time subscriber to the HRWB podcast, so when I was first invited to be a guest in 2021, I felt like I already knew George (KJ6VU), Mark (N6MTS), Mike (VA3MW), Rod (VA3ON), and Vince (VE6LK).
After all, I’d spent…what…hundreds of hours listening to them as I drive, travel, mow, split firewood, and put around the shack–? Don’t get me started on the number of things I’ve purchased as a result of being a subscriber to the podcast.
During the recording of that first episode where I was a guest, I realized just how much I enjoyed hanging with those guys. They have such a wealth of knowledge between them, yet none of them take themselves too seriously and they’re always up for a good laugh.
They invited me back several times as a guest and in December ’22, I was asked if I would become a permanent guest.
Although it shows a certain lack of judgment on their part, I quickly accepted before they could change their minds.
So there you go.
On that note, I will be attending the 2023 Hamvention and will be hanging out at the Halibut Electronics and Ham Radio Workbench booth when I’m not cruising the event, taking photos, and likely recording some video. Please stop by and visit!
On Friday, February 10, 2023, I had a hankering to fit in a POTA activation that morning. South Mountains State Park was an easy detour on my drive back to the QTH, so I scheduled an activation.
Brooks has been steadily working on his CW skills and is dangerously close to doing his first CW activation. We’ve managed to set up one late evening casual CW rag chew and I think his CW chops are very good. We plan to do more evening rag chews when our schedules align. He’s made amazing progress.
I contacted Brooks that Friday morning and he was game to meet up and do some POTA. He wasn’t quite ready to do a CW activation, so I suggested he log for me using the HAMRS app on my iPhone. I find that logging for CW ops during past Field Days really helped build my own confidence before I started using CW daily.
Brooks was 100% game to log for me.
And let me just say what a luxury it is to have someone log to HAMRS for me on my iPhone! It frees up my brain to simply log on paper (which I always do) and enjoy working stations without the extra busy work! Hat tip to good ole’ Brooks.
South Mountains State Park (K-2753)
I arrived at South Mountains State Park (the Clear Creek Access), put on my hiking boots, then Brooks pulled into the parking lot only a few minutes later.
We agreed in advance to fit in a quick hike up the Clear Creek Trail prior to the activation. I, for one, really needed to stretch my legs!
After the hike, I grabbed some gear from the car and we set up at the one picnic table at the Clear Creek Access.
Brooks and I both had commitments that day so could only play radio for 45-60 minutes max including set-up and take-down.
I deployed the same antenna I’d used the previous day: MW0SAW’s homebrew EFHW on a SOTAbeams winder.
Some of you might be familiar with Mike (N2HTT)’s Etsy Shop, HamGear3d.
Mike is a long-time QRPer reader/subscriber who designs 3D-printed radio frames for select QRP radios. In the past, Mike has designed frames for radios in his own collection including one for the LnR Precision LD-11, Xiegu X6100, Icom IC-705, and now the Xiegu X5105. Mike has also kindly sent me frames for many of these radios (knowing I also have them in my collection).
Mike has never asked to be plugged or promoted–in fact, the first frame he sent me was for my daughter’s radio–but I think his radio frames are functional and well-designed, so I’m happy to share info here on QRPer.com.
A couple months ago, Mike sent me a frame for the Xiegu X5105 and I realized yesterday that I never posted photos of it.
Like his X6100 frame, the X5105 frame fits around the radio; assembly is very simple (and well-documented on his website) and it doesn’t require modifying the radio in any way. It simply friction fits around the radio and is secured, thus can also be removed quite easily.
The frame, I’ve found, also protect the X5105 power button from accidentally being turned on in transit!
Below, I’ve posted a few photos of the Xiegu X5105 frame.
Thanks, again, Mike for sending me this radio frame. Very kind of you. Note that Mike can add your callsign to the front screen protector of the radio frame at no additional cost.
I have attended every QSO Today Visual Ham Expo since Eric (4Z1UG) created this brilliant virtual event. The online platform is quite easy to use and there are loads of fascinating topics from a wide variety of presenters.
I applaud Eric for championing radio topics that are open and accessible to Technician (and equivalent) class operators.
Twice before, I haven’t been able to attend the Expo sessions live (due to my schedule) but I register anyway! Why? Eric archives and provides all of the presentations in video format on-demand for Expo attendees after the event has ended. I simply log in and work my way through presentations over the course of a month, one morning coffee after another! The gift that keeps on giving!
These presentations are a shorter format and (I find) focus less on general topics covered elsewhere; they’re truly unique to the Expo.
This is one of the main reasons I register for the QSO Today Virtual Expo: I want to support a platform that produces brilliant ideas, innovations, and encourages a wide radio of radio activities!
I have no idea how Eric puts all of this together, but I’m glad he does and we all benefit from it.
Ham Radio Workbench Podcast at the QSO Today Virtual Expo!
Join us for a live recording of the Ham Radio Workbench podcast as we help kick off the Expo on March 25, 2023 starting at 1:00 UTC (March 24, 2023, 6:00 PM).
Eric also shared the following preview of the Roundtable Lounge that allow Expo participants to hang out in real time and move from table to table fluidly.
Here is what the Ham Radio Workbench table will look like (20 seats):
I’m really looking forward to this event! I hope you’ll join us.
Many thanks to Terry (N7TB) who sent the following question by email and has kindly agreed to allow me to share it here along with my response on QRPer:
Hi Thomas,
I cannot tell you how much I appreciate your POTA videos and all the suggestions you have made that I have adopted. I look forward to every activation you put on video. […]
[…]I have a question for you about using your AX1, and would really like your advice. I marvel at how quickly you can activate a park even with an AX1 antenna on 5 watts. I also have an AX1 antenna, counterpoise and KX2[…].
Anyway, I was out today activating K-0213, Maude Williamson State Park, about 20 minutes from my QTH in West Salem, OR. I operated 12W into a 33ft. EFHW antenna suspended vertically from a 31 ft. Jackite mast. All my activations are CW; I usually activate 20 meters.[…]
I was able to finally work 22 stations in an hour and a half, mostly in CA, UT, MT, and one in AZ. I did get a contact in KY, AZ NM, and MB, but it was a tough go for them to hear me. Most of my activations take me a bit over an hour to get 20 contacts.
As I thought about how much easier it seems that you are able to activate, I started to think about geography and population density differences between the East and West coasts. I used Google Earth and measured almost all points east of the Mississippi from Asheville and most were within 1200 miles. I would guess 2/3 of the US population live in this area. I drew the same range from my QTH and I get about half way into MT, barely into WY, most but not all UT, just touch the NW corner of AZ, and all of CA. In all but CA, I would guess the population total in this vast area is less than Illinois. That is my dilemma. I would love to be able to go out, setup my AX1 with my KX2 on even 10 watts, and make quick activations, but I would be surprised if I would get many contacts because the distances are so vast in the West and population density so low. I will actually try using the AX1 when the WX gets better and I can sit at a picnic table. So far, I have had little success with it, even deployed with the correct counterpoise. Do you have any thoughts on how to be successful with the AX1 from the West coast for POTA, or should I just concentrate on other antennas?
[…]Thanks again, Thomas, for the emails you have sent me with suggestions about equipment, and for all your great videos.
Very 73,
Terry
N7TB
Hi, Terry,
First of all, thank you so much for the kind words. I really appreciate that!
Regarding your message:
Keep in mind that the day you were operating was a very strange day in terms of propagation. There were times when we were having radio blackouts (especially in the western half of the US) and there were times propagation was amazing, yet very unstable. We were hit by so many heavy CMEs this weekend–one seemingly on top of another.
I think you do have a valid point, though, about the geography–one I try to mention when talking about compromised antennas like the AX1.
QSO Map from my latest AX1 activation.
I realize that I enjoy a lot of success with the AX1 because of where I live. I guarantee that the bulk of the US ham radio population is within easy reach of my AX1 antenna, no matter what band.
For you? There are no hams to your west (within easy reach), extremely few to your north (save WA and BC), and the best ham density is to your south in California.
In your shoes, here’s how/when I’d try using the AX1 (keeping in mind I’ve never operated POTA in the western states):
First, I would focus on using 40 meters when the band is healthy and/or for early morning, late afternoon/evening sessions. That should snag contacts across WA, OR, and CA with the AX1. Might be a stretch for southern CA, but I think you could make that work. The only caveat is that flaring has been wiping out daytime 40 meters a lot lately. You might check band conditions in advance.
I would also consider spending time on 17 meters, and possibly 15 meters with your AX1. This might throw your signal across to the midwest, Ohio Valley, and beyond. 17 and 15 meters isn’t typically as productive as 20 meters (at least, for me) but I routinely log west coast stations on 17 meters with the AX1. 15 meters is also getting a lot of attention in the POTA spots!
A wire antenna is almost always a better option than the AX1 if you have the time and space to put it up, but the AX1 is just so darn convenient.
Cheers, Thomas K4SWL
More suggestions?
The reason I asked Terry for permission to post his question and my reply here on the blog is because I suspect there are west-coasters (and those in similar geographic situations) who may be able to share some helpful strategies.
There are so many factors involved beyond what I mentioned in my reply. In fact, I imagine if the goal is to work parts further east, then adjusting the activation schedule for Central and Eastern time zones might also help (for example, not activating during dinner hours when I always see a bit of a lull in hunter activity).
If you have some experience, please feel free to comment!
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Many thanks to Mike (KE8PTX) who shares the following:
All in all, it is super rugged unit with great battery life and small for my QRP go kit. The only thing that comes in the box is the speaker and usb charging cord.
