As I mentioned in previous posts, I’ve been using the Elecraft AX1 in heavy rotation this year. I made a commitment to myself to do a string of activations with it in January and February and also pair it with a wide variety of radios beyond the Elecraft KX2 and KX3. So far, I’ve paired the AX1 with the:
In truth, the AX1 can be paired with any radio when you use a tripod mount.
It’s a bit trickier when connecting the AX1 directly to a radio and using the Bipod as a support because 1.) the antenna connector on the radio mustn’t be too high off of the surface, 2.) there needs to be enough clearance on the back of the radio to accommodate the bipod legs and 3.) ideally, it’s nice to have a ground point on the radio, else you’ll need to clamp the counterpoise to the shield of the BNC connector.
In addition, if your radio doesn’t have a built-in ATU of some sort, then you’ll also need a capacity hat or external ATU to finish off the impedance match. (For more notes about the AX1 and AX2, check out this previous post.)
Of course, you don’t have to use Elecraft’s bipod to support the AX1 when directly connected to a radio–you can build or 3D print your own support–but the bipod is really convenient when it does work.
Objective: Lunch Box Radio
One radio I’ve been eager to pair with the AX1 is the Penntek TR-45L.
Many thanks to Thomas (DM1TBE / M0KEU) who shares the following SOTA field report he also shared on the excellent SOTA reflector.
How two Scottish SOTA activations encouraged me to upgrade my German license
by Thomas (DM1TBE / M0KEU)
I just wanted to tell someone this story. Not sure if you want to hear it, but I will tell you anyway
During June last year, my boss asked me if I could step in for an ill colleague and visit a business partner in Frankfurt and Edinburgh. As a SOTA activator, I first checked the map and have happily spotted a summit within walking distance of the hotel in Edinburgh.
Unfortunately, there were three issues to solve:
The UK does not accept my German “Klasse E” (CEPT novice/intermediate) license;
operating a radio on the summit requires written permission and
as the duration of the trip was planned with just 2 overnight stays, only hand luggage was possible.
At the Ham Radio in Friedrichshafen, I asked an RSGB representative if it is possible to get a British license as a German. Mark, M1MPA, explained to me how the process worked, so I started the online course provided by GM6DX. It was not too difficult, and I soon passed every mock exam. Roughly, two weeks before the trip, I passed the RSGB operated online exam and got my UK foundation license, so I could operate in Scotland as MM7TBE.
Regarding the issue with the permission to operate on the summit, I first chose to ignore and pretend being a stupid foreign tourist until I was told that it is really enforced, and my activation could be deleted. So, I asked the Ranger Service at Historic Environment Scotland for permission less than two weeks before my activation and received it just one day later with a comment that it is usually expected to ask one month in advance. Many thanks to the Ranger Service, next time I will come earlier – I promise!
The last issue was the size of the equipment.
There is no tree on top of the summit Arthur’s Seat GM/SS-272, and I had very little space left. So I went with a KX3 with an AX1 antenna and a FT2D for 2m FM.
Now the journey could begin.
On the first day, I was at a very high place in Frankfurt but unfortunately, it did not qualify for SOTA. That evening I arrived in Edinburgh.
The next day, late afternoon, the fun could start.
If you recall from my last field report, I’ve been pairing the Elecraft AX1 antenna with a number of radios. For me, it’s been a fun exercise because I always enjoy seeing what sort of results the AX1 might produce. So far, it has never disappointed.
On Thursday, February 2, 2023, I packed two radios in my car with the idea of fitting in two consecutive park activations.
At my first activation of the day–Lake James State Park–I paired the AX1 with my Mission RGO One transceiver. The activation was a blast! Not only did I stay busy working stations, but I also managed a little QRP DX thanks to a hunter from Italy.
K2 and AX1 Under Shelter
Little Guatemala Café
After grabbing a curried chicken salad wrap at Food Matters and a coffee at Little Guatemala roasters in Morganton, I hit my second and final park of the day: Tuttle Educational State Forest (K-4861). It was rainy, so the park was empty which allowed me to take over the very large picnic shelter at Tuttle.
Even though this particular shelter is in a bit of a dip in the land and has a large metal roof, I’ve had successful activations there in the past employing the AX1 antenna.
Many thanks to Conrad (N2YCH) who shares the following field report:
AX1 Test using American Radio Supply AM-801 Window Mount: POTA Activation at Stuart B. McKinney Wildlife Refuge, K-0228
February 19, 2023
By: Conrad Trautmann (N2YCH)
If you’ve been reading the posts here on QRPer.com lately, you probably already know that the Elecraft AX1 has proven to be an excellent antenna for POTA activations for CW, SSB and Digital modes.
Personally, I used it for a New York City POTA rove I did at the end of 2022 and was able to activate four parks in one day all over Manhattan.
Recently, Alan, W2AEW contributed a story to QRPer.com detailing how he used a window bracket he constructed with an AX1 to do a CW park activation from his car. I’ve actually done a few digital activations from the car using the AX1, however, I used the tripod with the Elecraft tripod adapter and ran coax to it out the window and draped the counterpoise down the hood or trunk. This has worked well except for windy days where it would blow over. I was intrigued by the possibility of using the window mount and a number of the commenters to Alan’s post suggested sources for these types of mounts. I ended up ordering an AM-801 from American Radio Supply.
Since the AX1 depends on a counterpoise wire to operate properly, the first thing I did after receiving the AM-801 mount was to drill a hole in the base for a screw and a wing nut. The base is painted black, so I got my continuity meter out to double check that the screw was making a good ground, which it was. I had to bend the mount up slightly for the antenna to be vertical, since my Jeep windows don’t have much of an angle to them. I’m sure it would be just right for most cars.
After posting my latest field reports using the Elecraft AX1 antenna, I’ve received a number of messages from new AX1 owners. All of the following have kindly allowed me to share them here with you.
AX1 Patio DXing
From Michael (K1ETA):
Thomas,
I am a subscriber and an avid follower. [L]ike you, I do a lot of portable ops with various antenna setups and radios. I was recently offered an AX1 and I was told it was basically a dummy load. Having seen your videos and proof of success I accepted it and I can’t say how much fun I have with it. Yesterday, I made 22 DX contacts throughout Europe in the ARRL World Wide CW contest from my patio in my back yard with 5 watts, the AX1 and my KX2.
I would never have tried that with the AX1 had I not seen your videos. You see it is even good enough for contests if you don’t try to compete with the big guns. Listen, search and call back the stations without pileups!
Many thank for all you do and for making me an AX1 believer.
72
Michael Kenney (K1ETA)
Pairing the AX2 and Emtech ZM-2
From Michael (N7CCD):
Hi Thomas,
I just finished your video comparing the AX1 and AX2 and thought you might appreciate a solution I came up with for making my travel more compact.
I purchased the AX2 during the February sale and found it pairs well with the ZM-2 ATU for my IC-705 (wow what a mouthful of acronyms. No wonder my wife and daughter call me a nerd…). I didn’t get the tripod adapter in the sale, but found the AX2 sits perfectly on the ZM-2 which acts as a very stable stand. There is some body capacitance when tuning, but not too much. I was even able to easily tune it on 17M. I need to try other higher bands sometime.
I set it up in our breakfast nook just for kicks and sent a few JS8 and FT8 transmissions to see where I was being heard (I’ll include a screenshot). Was able to successfully send an APRS text message, and I even made an SSB contact into a special event station in Nevada!
I found a hard sided case I can store the tuner and AX2 in, which also had enough room to put in a “speaker wire” antenna as an option. Why not?
I think this may replace the AlexLoop for air travel since it’s so compact and versatile.
Hope all is well on your side of the country!
Michael – N7CCD
P.S. +16 into Michigan!
AX1 DXing
From Kevin (KD8IE):
Hi Tom,
After video about the AX1 recently, I decided to order one and it came last week.
The weather’s been kind of chilly up here. As a matter of fact, it was 41 when I decided to go out and do an activation then at Cuyahoga Valley National Park.
Well, suffice to say I made contacts with the antenna a lot farther than I expected it would be. The bands were really long. First station I worked was in New Brunswick. The last two stations were Italy and Slovenia.
73,
KD8IE
Many thanks to all of you for sharing your experience and tips using the AX series antennas!
I look forward to all your videos and am enjoying how you use the Elecraft AX-1 in the field.
I have built the “WD-PT-PB” attachment for my AX-1 antenna.
That is, it is for Windy Day-Picnic Table-Park Bench use. It can be set up horizontally or vertically on the edge of a picnic table or at any angle on the back of a park bench and is a secure attachment for the AX-1 off the radio.
[I] bought the bolts straight and put them thru a random C clamp secured with a nut or wing nut and then bent one in my vise. Loosen the wing nut and angle the bolt any way I want and tighten the wing nut.
The pictures show it better than paragraphs of a description.
73,
Jim Long
Madison, WI
N9EET
That’s brilliant, Jim! I love how versatile the clamp is and that it even fits in your Maxpedition pouch! No doubt, it’ll help the AX1 (or AX2, or any similar antenna) survive the windiest of deployments.
If you’ve been following QRPer.com and my YouTube channel for long, you’ll notice that I typically post two field reports with videos per week when my free time allows. Each report takes about four hours to produce along with a video. I’ve currently got a small backlog of videos I need to post, so in order to squeeze them into my schedule, I’m going to use a slightly more abbreviated field report format: a “postcard” format!
My Postcard Field Reports will still be information-packed, just slightly more concise and distilled than my average field report. I’ll primarily post these for sites I visit frequently.
Speaking of which….
Lake James State Park (K-2739)
Thursday, February 2, 2023, was a rainy, dreary day so the perfect time to play a little POTA, right? I made time in my morning to visit Lake James State Park (K-2739).
When I arrived at the Catawba River Access, the parking lot was empty. Not too surprising considering it was a Thursday morning on a chilly, rainy day.
During the months of January and February 2023, I’ve given my Elecraft AX1 a thorough workout. As I mentioned in a previous post, I thought it might be fun to take the AX1 out on a good 30 days worth of activations.
Turns out, I’ve had such brief windows of opportunity to play radio recently, the AX1 and now AX2 have been valuable tools in my field kit. They are, no doubt, the quickest-to-deploy and most portable antennas in my collection.
The Elecraft AX2 paired with the KX2.
If I only have a 20 minute window to squeeze in a quick park activation, the AX1 and AX2 make a valid POTA activation–with 10 logged contacts– a reality.
I originally purchased my Elecraft AX1 in the spring of 2020 and have used it extensively since then. In January 2023, I finally caved in and purchased the most recent addition to the AX family, the mono-band AX2.
Elecraft AX1 vs. AX2
Since I’ve been publishing numerous field reports recently using the AX1 (with more to come) and since Elecraft has included both the AX1 and AX2 in their February 2023 Specials, I’ve received questions from readers asking:
“Should I buy an AX1 or AX2–?”
and“If so, which one should I buy? What are the differences?”
At first, I simply pointed readers to the concise comparison guide that Elecraft publishes on their website (linked below).
I realize, though, that there are characteristics of each antenna that you might only discover after actually using them in the field.
I decided to make am unedited video–based on a few notes–not only describing the differences and similarities of the AX1 and AX2, but also if either would potentially benefit you as a field operator or traveler.
One quick note about resonance…
One point I touch on in the video is that both the AX1 and AX2 antennas are designed to be mostly resonant on 20 meters.
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.
If you are pairing the AX1 or AX2 with a radio that doesn’t have an ATU (or you can’t use an external one), then you might consider making a simple capacity hat. Check out this field report and video where I paired the AX1 with the IC-705 and used a capacity hat to sort out the SWR.
Video
As with all of my videos, this one is unedited and commercial-free. If you’d like to skip through the video to the parts you might find most relevant, simply hover your mouse over the YouTube time line and click on the chapter indicated:
Another note here: I have no affiliation with Elecraft, but pushed this article and video to the front of the line to help those who are consider taking advantage of Elecraft’s AX1/AX2 February 2023 Package Deals.
I hope you find the video helpful. I’ll try to answer any other questions you might have in the comments of this post.
I’d also like to send a special thanks to those of you who have been supporting the site and channel through Patreon and the Coffee Fund. While certainly not a requirement as my content will always be free, I really appreciate the support.
On Friday, January 27, 2023, I dropped off one of my daughters at the library for a creative writing session.
Hazel was along for the ride, so we decided to hike on the nearby Mountains To Sea Trail (MST) while my daughter was in the meeting.
During the hike, I realized that I should have taken my field radio pack along because it would have been so easy to activate both the MST and Blue Ridge Parkway as a two-fer.
Instead, Hazel and I enjoyed our hike and got back to the car with about 35 minutes or so to do an activation–including set-up, on-air time, and pack-up. That would leave me just enough time to pick up my daughter at the library before they closed for the day.
Challenge accepted!
Because I had been using the Elecraft KX2 and AX1 recently, I had both packed in my Spec-Ops EDC backpack. In theory–even filming a video at the same time–I knew I could probably fit in a whole activation with 25 minutes on the air. I only needed 10 contacts, and I’ve never been in a situation where the AX1 couldn’t achieve that goal.
As I mentioned in my previous field report, on Saturday, January 21, 2023, I had just enough time to activate two parks in short order on the way back to my QTH
I thought it might be fun to perform both of these activations with the Elecraft KX2 and AX1 combo because they’re so speedy to deploy.
Once again, I wanted to show the whole KX2/AX1 set-up and pack-up process in my activation video.
Lake James State Park (K-2739)
As I pulled into the Lake James Catawba River access, I discovered that there were few other guests there that day. I was expecting more people on a Saturday especially since the weather was so pleasant and South Mountains had been so busy earlier that morning.
Then again, the Catawba River access always has less visitors than the Paddy’s Creek area (which is really the main public access point for Lake James).
I pulled into a parking space, found one of the closest picnic tables, and set up the station in short order.
At South Mountains State Park, an hour earlier, I performed the entire activation on 20 meters. To shake things up a bit, I decided to perform the one at Lake James on 17 meters (note here that the AX1 only works on 20 and 17 meters unless you have the coil which adds 40 meters). Continue reading KX2/AX1: Second quick activation of the day at Lake James State Park!→
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As I mentioned in previous posts, I’ve been using the Elecraft AX1 in heavy rotation this year. I made a commitment to myself to do a string of activations with it in January and February and also pair it with a wide variety of radios beyond the Elecraft KX2 and KX3. So far, I’ve paired the AX1 with the:
One radio I’ve been eager to pair with the AX1 is the Penntek TR-45L.
