Category Archives: QRP

Antennas, Guest Posts, How To, Portable, QRP, SOTA

A Portable Oblong Antenna for 2 Meters

5 Comments


Many thanks to Andrew (VK2ZRK) who writes:

Hello Thomas,

The area I live near Canberra in Australia has many SOTA summits that are easily activated on 2m with a HT. That said a good antenna always helps. The 2m oblong antenna is very popular in these parts. It is easy to make, light to carry and packs small. It is horizontally polarised.

This is the second oblong I have built. I gave my dad VK4FASR my first one and have finally built another. I mostly use the bottom of the band for SSB/morse, the middle for APRS on 145.175 and 145.500 for SOTA. The antenna is cut accordingly.

References:

Andrew VK1AD
https://vk1nam.wordpress.com/2019/09/29/antenna-project-2m-145-mhz-rectangular-loop/

Peter VK3YE
https://youtu.be/Nyttl277ehs?si=9M5mP-KlxTGln0Tm

PARTS LIST
(Sorry about the lack of Freedom units)

    • 8mm fibreglass tube.
    • 8mm ID kite nocks (both from a kite supply).
    • Double walled glue lined heat shrink.
    • 2200mm Antenna wire – DX Commander in this case.
    • 2mm ‘ZingIt’ dyneema.
    • A BNC to banana adapter.

Assembly

I cut the tube so the centre to centre distance between the holes in the kite nocks was 360mm as per Andrew VK1AD’s instructions.

With the wire I started with 2200mm and trimmed until I had the best SWR at 145.000 when I lost my nerve and stopped cutting. [See photos below.]

Everything is held together with the glue lined heat shrink.
The top tube includes a little loop made from the ZingIt to suspend the antenna. Total weight is 102g.

The 2mm ZingIt can hold about 200Kg. I hope the pics make sense

73
Andrew VK2ZRK

Photos with detail

Field Radio Kits, News, Portable, QRP

Field Kit Gallery: KM4CFT’s Elecraft KX2 Go Kit

Leave a comment

Many thanks to Jonathan (KM4CFT) who shares the following article about his portable field radio kit which will be featured on our Field Kit Gallery page. If you would like to share your field kit with the QRPer community, check out this post. Jonathan writes:

Hi Tom,

I thought I would share the two go kits I have [check out the QMX kit here]. I tend to customize my equipment and supplies before I go on a POTA or SOTA outing but I keep these for the rare occasion when I want to grab a radio real quick.

The Elecraft KX2 Go Kit

A bit more standard fare for elecraft KX2 owners. I use this kit the most often since the KX2 is rugged and incredibly well suited for field activations.

The kit contains 2 antennas: a Tufteln 28.5′ speaker wire antenna on a custom designed winder, and the Elecraft AX2 with all the fixings (mini tripod, adapter, bipod).

I keep 2 CW paddles on me: the KXPD2 and a retractable paddle designed by K6ARK.

I have 2 microphones: the Elecraft microphone and a mini microphone designed by K6ARK.

Having multiple options lets me operate in just about any situation/position.

For accessories, I have a cheap pair of earbuds, a power cable, and BNC to SO-239 adapter, 6 feet of coax and a BNC binding post.

Hopefully this information is useful to you and your readers!
-Jonathan KM4CFT

New Products, News, Pedestrian Mobile, Portable, QRP, QRP Radios

Elecraft KH1 Super Power? Anytime/Anywhere POTA/SOTA Hunting!

13 Comments
Photo from morning SOTA activation on Richland Balsam.

Yesterday morning, I took my Elecraft KH1 to the summit of Richland Balsam and performed a SOTA activation using only the KH1’s whip antenna on 20 meters (I ran out of time to hit 17 and 15M).

It was insane fun. Without really intending to, I actually filmed the entire hike to the summit, entire activation, and the hike back to the car. I’m not sure I’ve ever done that before.  I plan to post the video by Monday (Nov 6) if at all possible (again, trying to push my KH1 videos to the front of the line for a little while).

Parking Lot Pedestrian Mobile

After the SOTA activation, I drove back to town to pick my daughters up at their acting class. I arrived about 20 minutes before the class ended and thought, “why not pull out the KH1 and see if I can hunt some POTA activators–?”

I opened the trunk of the car, grabbed the KH1 from my SOTA pack and then decided to even film this short, impromptu hunting session.

As you’ll see in the video below, it took no time at all to deploy the KH1, hop on the air and work a couple of stations.

Short Video:

Click here to view on YouTube.

I could have also chased some SOTA activators, some DX, or just looked for a random ragchew with someone calling CQ.

I like hunting/chasing POTA and SOTA activators, though, because the time commitment is manageable. For example, by the time I ended this video, my daughters and one of their friends were already hopping in the car to hit the road. I didn’t have to apologize to anyone for ending a QSO early. 🙂

November is KH1 month

I decided that I’m only going to use the KH1 both in the field and in the shack during the month of November. The only exceptions will be other radios I need to test or if I need to make contacts outside of the 40-15 meter KH1 window.

One of the big reasons for this level of commitment is that I am in the testing group of the KH1. This is how we flesh-out any minor issues that may have gone unnoticed.

Another reason is I do plan to post a comprehensive review of the KH1 eventually and I only feel comfortable doing this after I’ve spent dozens of hours with a radio.

If I’m being honest, another reason is that I absolutely love this anytime, anywhere radio. It’s so insanely portable, I take it with me everywhere. The KH1 and I have been inseparable since last Monday when I took delivery. And, yes, I’m still contemplating what her name will be.

Note that I will post some of my other activations videos this month (I’ve quite a few out there!) and I will also post the occasional bonus video exclusively on Patreon. Indeed, I posted a video on Patreon yesterday where I paired the CHA F-Loop 2.0 with my Icom IC-705.

Stay tuned for more radio goodness and I hope everyone has an amazing weekend!

72,

Thomas (K4SWL)

Field Reports, Guest Posts, News, Portable, POTA, QRP, Travel

POTA Field Report: Andrea Activates Two Iconic Cold War Sites

9 Comments

Many thanks to Andrea (IW0HK) who shares the following field report:

Cold War POTA in Berlin

by Andrea (IW0HK)

In the last week of October, I found myself in Berlin for a work commitment.

Taking advantage of two half-days off, I wanted to combine two of my great passions: radio and the history of the Cold War. I chose to visit two historical sites that also serve as a reference point for the POTA (Parks on the Air) ham radio program, allowing me to transmit with my radio in these unique locations.

The first location is a park located about a kilometer away from where I worked for a week, the headquarters of RBB, the public radio and television of Berlin and Brandenburg. This park is Teufelsberg, which literally means the Devil’s Mountain. It is an artificial hill in Berlin, created using the rubble from World War II, located within the Grunewald forest (POTA reference DA-0218).

On this hill, the Teufelsberg listening station of the American NSA in Berlin was situated, which was used to intercept radio signals from East Germany during the Cold War.

Today, you can still see the remains of the antenna covers of the listening base. I activated the Pota park that has been established around the abandoned base, and I was delighted to transmit my signals in Morse code (CW) in QRP mode in this historically significant place.


I used the small QMX transceiver from QRP Labs, a gem for operating in FT8/CW modes on the 80/60/40/30/20 meter bands.

For an antenna, I used a 20-meter wire connected to an EFHW 49:1 balun, hung above a tree. Amid families flying kites, I made 15 CW QSOs, which allowed me to validate the park activation. The program requires a minimum of 10 QSOs for activation to be valid.

The second activation took place in another symbol of the Cold War: the runway of the former Tempelhof airport. I activated this as a POTA site and transmitted CW QRP with the small QMX transceiver from QRP Labs in the fog and cold.

The Berlin-Tempelhof Airport was an airport located in the southern part of the central Tempelhof-Schöneberg district and was operational from 1923 to 2008.

It is famous for hosting the Berlin Airlift base (1948-1949), which was an incredible operation undertaken during the Cold War by the United States and their Western European allies to transport food and other essential supplies to West Berlin, surrounded by the Soviets.

Today, the airport is closed, and its runway has become a massive park (POTA reference DA-0169) used by Berliners for various outdoor activities. I activated it early in the morning on a gray and cold day, setting up my EFHW antenna practically on the runway.

Again, I used only CW, and in no time, I reached the number of 11 QSOs. The cold made me stop the activity earlier than planned, but the activation is still valid. After concluding the transmissions, I walked through the enormous park, imagining its past use and appreciating how often my amateur radio passion leads me to incredible places.

This was the first test of this “minimal” POTA kit with the QMX transceiver, the 20-meter EfHw antenna, and the XTPower XT-16000QC3 12v power bank.

I must say that the test was successful. This is an excellent little radio that I want to use and take with me on every work trip. The POTA program continually takes me to incredible places, both in terms of nature and history, as it did in this case in Berlin

Field Reports, News, Portable, QRP, QRP Radios, Reviews, Videos

My First POTA Activation with the New Elecraft KH1 Handheld QRP Transceiver!

30 Comments

Yesterday, I posted some initial notes about the Elecraft KH1 and mentioned that I hoped to perform a POTA activation later in the day.

I’m pleased to report that I was able to fit in that activation!

I’m pushing this report and video to the front of the line because so many readers are eager to see how the KH1 performs during a field activation. Instead of focusing on the park, in this field report we’ll be taking a closer look at the KH1 and my initial impressions after performing a pedestrian mobile POTA activation with it.

Packing the KH1

I had a very hectic schedule yesterday and was on the road in/around Asheville from 8:00AM to 2:00PM before an opportunity opened to fit in an activation.

After a quick trip back to the QTH for lunch, I packed the Elecraft KH1 field kit in my EDC pack (a travel laptop bag).

Herein lies my first impression of the KH1: even though I knew I had packed the entire kit, I felt like I must have been leaving something behind.

Sounds funny, but even though I pride myself on making fully self-contained field radio kits, I felt like there must have be something else I needed. The KH1 field kit just seemed too small, too lightweight, and too compact to have included everything I needed for an activation.

Intellectually, I knew that it included everything needed, but I still did a mental inventory:

  1. Radio? Check.
  2. Antenna? Check.
  3. ATU? Check.
  4. Paddles? Check.
  5. Battery? Check.
  6. Counterpoise? Check.
  7. Log book and pencil? Check.

Hard to believe, but it was all there.

Trust me: the first time you take your KH1 to the field, I bet you’ll feel the same way I did.

Blue Ridge Parkway (K-3378)

Because I was so short on time, I decided to activate the Blue Ridge Parkway which is the most convenient POTA entity when I travel into Asheville from Swannanoa.

It was cold and blustery afternoon the afternoon of November 1, 2023. At my QTH, I checked the temperature and it was about 34F. I knew it would be a bit warmer in town which is a good 1,000 feet lower in elevation, but I still grabbed my gloves on the way out the door. Glad I did!

As I mention in the activation video below, I wasn’t exactly on my “A Game.” I had received a couple of vaccines the previous day and my body was a bit achy as if I was starting to get the flu. But, of course, I wasn’t. Still… I didn’t feel 100%.

I arrived on site and set up couldn’t have been easier:

  1. Open the KH1 pack
  2. Remove the KH1
  3. Attach the counterpoise and string out on ground
  4. Remove whip from clips and attach to top of KH1
  5. Extend whip
  6. Turn on radio
  7. Find a clear frequency
  8. Hit the ATU button for a 1:1 match!

We’re talking a 30 second process even for someone who moves slowly.

Important notes about my KH1

Keep in mind the following notes that are relevant at time of posting this field report (November 2, 2023):

  • I am waiting on a firmware update to add:
    • CW Message Memories
    • CW Decoding
    • Internal Logging
  • I purchased the full “Edgewood” package but I don’t yet have my logging tray/cover yet. Elecraft plans to ship this within the next few days.
  • My KH1 is a very early serial number because I’m in the volunteer testing group.

The KH1 Speaker

The KH1 internal speaker is located on the bottom of the radio between the AF Gain and Encoder knobs.

I consider the Elecraft KH1 speaker to be a “bonus” feature. The speaker is small (1.1 x 0.65”) and limited in fidelity.

I had planned to connect my Zoom digital recorder to the KH1 and record audio directly from the headphone port during this activation. Continue reading My First POTA Activation with the New Elecraft KH1 Handheld QRP Transceiver! →

Field Radio Kits, News, Portable, QRP, SOTA

Field Radio Kit Gallery: VE6VID’s KX2 SOTA Kit

11 Comments

Many thanks to Malen (VE6VID) – Canada’s first SOTA Double Mountain Goat – who shares the following article about his portable field radio kit which will be featured on our Field Kit Gallery page. If you would like to share your field kit with the QRPer community, read this post.

Hello Thomas,

After being prompted by Vince (VE6LK) I am sending in my humble lightweight HF setup. The core of the setup is an Elecraft KX2 with a few goodies bolted onto it.

My station consists of KX2 with tuner, end plates with lexan cover, external 4s LiPo (1100mah) battery, power cable that is fused and has switched diodes (voltage reducer), an Amazon speaker and earbuds, a modified UV5R microphone (I’m an SSB guy for now), and a homebrew 65 ft EFHW. It’s all carried in a large water bottle case by Condor and weighs in at just under 3lbs. That case also fits an Icom IC-705 or the Elecraft KX3.

I have approximately 300 SOTA activations with this along with various masts. These activations range from easy 10 pointer strolls in Arizona and Manitoba to strenuous (over 1000 metres of gain) 4 pointers in the Alberta Rockies along with summits in VE5, VE7 lands tossed in as well.

By using old Altoids tins for storage for earbuds and the mic, everything fits into the case with the antenna laying on top. I ended up doing some trimming of the kite winder to fit with ease on top of the case.

Here is the basic setup laid out.

The battery will last me for two ten to fifteen minute activations without having to switch the diodes out of line.

When solo activating in VE6 land, I use the Amazon external speaker to make noise to let the local four legged critters know I am there.

After a few years of using a dipole on treed summits, which at times can be troublesome to setup, I built a 49:1 EFHW. When using the EFHW I typically set is up as an inverted V with a mast, invert L with trees. The antenna is a homebrew 49:1 using a non-standard size type 43 toroid, SOTAbeams antenna wire 65 ft long, bulkhead male BNC for connecting directly to the radio.

Trying to go compact, not necessarily light, I ditched the Elecraft mic for something with a small footprint, a mic that started life as an UV5R mic / earbud combo from Amazon . By replacing the cable with a Walmart 3.5mm TRS cable and adjusting the menu on the radio, it works great.

Take care,  Malen Vidler, VE6VID

Vince’s notes: Malen is Canada’s first SOTA Double Mountain Goat. You can check out his YouTube channel here. He is soft-spoken and deeply knowledgeable on SOTA and Amateur Radio. He is one of my go-to people when I don’t understand something in these areas.

Field Radio Kits, News, Portable, QRP

Field Radio Kit Gallery: KK4Z’s TR-35 SOTA/POTA Field Kit

3 Comments

Many thanks to Scott (KK4Z) who shares the following article about his portable field radio kit which will be featured on our Field Kit Gallery page. If you would like to share your field kit with the QRPer community, read this post.

Check out Scott’s field kit which he originally posted on his blog:

QRP at Home and SOTA Setup

I posted earlier that I was in a radio doldrum. Today I am slowly drifting back to fair skies and wind at my stern. My friend Thomas K4SWL recently posted on his blog a Field Kit Gallery showcasing operators’ various field kits: https://qrper.com/resources/field-radio-kits/ I thought I would post mine.

This is what I typically bring for a SOTA activation. I also have some general outdoor essentials like an iFAK, bug repellent, a compass, water, and of course snacks. For POTA, I am usually in my camper and bring a full-sized radio like my Elecraft K3/10. I also have an IC-705 which I like for those one-day POTA activations. The kit is pretty simple and gets the job done. Here is a list of components.

Also, I decided to take a break from everything else I have been doing and get on the air. I recently got my K3/10 back from the shop and thought I would give it a good workout at home so I wouldn’t have another calamity like I did a few months ago https://kk4z.com/2023/08/06/calamity-on-black-rock-mountain/. I set the radio up in the shack and started to make contacts. I had forgotten how far 10-watts CW can get you with a good antenna. At the home QTH, I run a 270′ OCF dipole with the apex up about 35′. I was hunting POTA activators and found I could work almost everyone I heard. I got as far north as Ontario, Canada, and as far west as TX, MO, and IA. This was still the morning and there weren’t many activators out yet. The K3/10 worked like a champ and purred like a kitten. Not hearing relays click during QSK CW is sublime. With the K3/10 cleared for field use, I have a couple of outings planned for it.

It feels good to be back in the saddle again. Absence makes the heart grow fonder, and after being away from amateur radio, even for a short while, I appreciate it all the more. 72 de Scott

New Products, News, Portable, QRP

The Elecraft KH1 has arrived! (A few photos…)

43 Comments

I’ve gotten a lot of email and comments asking when my KH1 would arrive and I’m happy to report that I picked it up this morning at the post office!

I ordered the “Edgewood” package, thus the KH1 with all of the trimmings. I was shipped the full radio kit save the logging tray/cover.

The logging tray had a last minute hardware change. Elecraft kindly shipped the radio first and the logging tray will follow in a few days.

I must say: the KH1 is even smaller than I imagined.

Quick video

I made a very short video as I opened the box for the first time. To be clear, it doesn’t likely meet the requirements of an “unboxing” video, because, frankly, I really don’t understand those types of videos.  It’s just me opening the box and holding the radio for the first time.

Click here to view on YouTube.

Hunting POTA!

I popped the included battery on my Elecraft fast charger and gave it a good 90 minutes of charge while I did some yard work.

Of course, I couldn’t wait to hop on the air, so I attached the whip antenna and the counterpoise, then hit the ATU button for a 1.2:1 match on 20 meters.

I then opened POTA.app and tuned to a couple of POTA activators.

 

First up was KK4WDP who was activating K-0784 in Washington DC.

 

I was still sorting out a few of the adjustments on the KH1 (keyer speed, sidetone level, AF gain, etc.) so I can’t say my exchange was “graceful.” (If you’re reading this, Josh, that’s my excuse and I’m sticking with it.)

I moved slightly off frequency to delineate my tone, which I think helped punch thorough. On this end, I could hear a couple of strong stations calling at the same time. DC is almost too close for 20 meters this time of day, but I received a 22N report. Thanks, Josh!

Next, I tuned to 14059 MHz where NR1D was activating K-1706.

I called and got a reply on the first try. I can’t remember the report he sent, but he was a solid 5NN. Thanks so much for working me, Kent!

Photos:

I haven’t seen a lot of up-close product photos yet, so I thought I’d share some here. Again, note these don’t include the logging tray, but I will post more photos when it arrives soon.

Stay tuned!

As I mention in the short video above, I’m going to push my KH1 videos to the front of the line.

Also, if you’ve ordered a KH1, you’ll need to check with Elecraft about the predicted ship date. I suspect demand exceeded their projections!

I’ll have more photos and full field reports hopefully starting this week. Stay tuned!

72,

Thomas (K4SWL)

Field Reports, News, Portable, POTA, QRP, SOTA, Videos

Kneeboard SOTA: INSANE DX with my smallest, most compromised antenna!

15 Comments

I walked out of my front door on the morning of Friday, September 29, 2023, knowing I was going to do an activation, but I had no idea where that might be.

I certainly had no idea it would be one of my most memorable activations ever–!

I knew I had a five hour window to play radio somewhere not too far from my daughters’ classes near the Asheville Airport.

I really wanted to do a SOTA (Summits On The Air) activation, but I’d pulled a muscle in my back and was nursing it a bit.  I knew that an invigorating hike on a long, gnarly trail was not really in the books.

After dropping off my daughters, I sat in the parking lot running through the activation options in my head. There were 5 or so parks within an easy drive. I knew a POTA activation probably made the most sense since it wouldn’t require hiking or carrying a heavy pack.

Then again, I really wanted to do a SOTA activation–the weather was so amazing, I didn’t want to miss out on an opportunity to take in a summit.

I decided that if I took a minimal amount of gear and activated an “easy” summit, then maybe I could get away with a little SOTA without hurting my back. I thought this might be the perfect excuse to do a SOTA activation pairing my Elecraft KX2 and AX2 antenna. I had a lightweight chair and my kneeboard, so in theory, I could set up anywhere on the summit with my entire station on my knee.

Next, I only needed to find the right summit and one came to mind almost immediately…

Black Balsam Knob (W4C/CM-005)

The last time I activated Black Balsam was with my buddy, Monty, in 2021. I remembered that it was an easy hike with stunning vistas of Pisgah Forest (K-4510) and the Blue Ridge Parkway (K-3378).

This it the Mountain Ash (Sorbus Americana) with bright red fruit!

I drove 55 minutes to the trailhead and was happy that there weren’t too many cars in the parking area yet that morning. Black Balsam is one of the most popular summits on the Blue Ridge Parkway, so sometimes it can be a challenge to find a parking space…especially with stunning weather like this!

The hike was very pleasant and my GoRuck GR1 backpack was pretty light.

I knew I’d chosen the right summit hike.

The views from the Art Loeb Trail do not disappoint. (Click images to enlarge.)

In fact, if anything, I wish this hike were just a little longer because I enjoyed the scenery so much!

It’s only 3/4 of a mile one way, so it goes by quickly. Still… it’s why I chose this particular summit. I knew it would be gentle on my back (and it was).

Once I reached the summit, I started searching for a spot to set up. There were quite a lot of folks on the summit that morning, so I looked for a site just slightly off of the main trail.

I found an area on a side trail that provided just enough room to set up my folding chair without disturbing the flora.
Continue reading Kneeboard SOTA: INSANE DX with my smallest, most compromised antenna! →

Accessories, Digital Modes, FT8, News, QRP

BG6LH Designs a Board for Integrated Yaesu FT-817/818 FT8 Operation

10 Comments

Many thanks to Cao (BG6LH) who writes:

Hi, Thomas!

I would like to share my QRP FT8 kit for Field Operation.

A long time ago, I was seeking the most lightweight QRP kits for FT8 field operation. My goal was to have just one radio, one antenna, one phone, without too many cables, boxes, etc.

Finally, I designed a PCB. It is a Bluetooth DIGI Adapter and can be mounted on the rear panel of my FT-818.

Just plug it to the DATA and ACC jacks. It can be powered by ACC jack’s 13.8V Pin.

It works well with FT8CN, an android FT8 app.

Now, my dream has come true!

My Antenna was a so-called GAWANT, designed by JF1QHZ, I guess it’s a simple Vertical EFHW. I built it with a 1.2 meter rod.

It’s working on 7~28MHz bands, not very efficient, but so small and portable.

For FT8 QRP POTA, field operation, all of these components can be put in a small bag, and deployed in minutes.

I shared my PCB design on Github. If anyone wants to modify it, you are welcome to do so!

https://github.com/BG6LH/FT-81x-BT-DIGI-Adaptor

Thank you for sharing this, Cao. This is absolutely amazing and an incredibly clever design! I suspect a lot of FT-818/817 enthusiasts will make this same build via your design!

Thank you for reaching out and for sharing your work with the QRP community!