All posts by Thomas Witherspoon

How To, Morse Code

André’s “Let’s Learn Morse Code” online practice tool

3 Comments

Many thanks to André (PY2KGB / VE2ZDX) who shares a link to his web-browser-based CW practice tool. André notes:

I’m writing to share a tool I wrote to help myself with learning CW. I recently found out that people have been enjoying this tool so I’m sharing it with you and if you think it’s something worth sharing feel free to do so.

It was made mobile first and if you can’t hear the sound, disable the silent mode. It outputs the sound the same way WebSDRs do so it has that little issue with the sound that SDRs do, but it is browser related.

Click here to check out André’s online CW practice tool.

Thank you, André! I love how simple this tool is to use and the fact that no app is needed. Again, thank you for sharing this with the community at large!

Antenna Tuners, Antennas, News, Portable, QRP, QRP Radios, QRPer Notes, Reviews

QRPer Notes: Mike’s POTA Bag Load Out, CHA F-Loop Remote Tuning Mod, and KB6NU’s review of the Ailunce HS2

Leave a comment

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/videos to interesting stories and tips making waves in the world of radio!

511 Deployment 24 POTA radio bag (KE8PTX)

CHA Loop Remote Tuner | K7SW ham radio

The Ailunce HS2 has lots of potential (KB6NU)

Just before Thanksgiving, I received an email from Cara Chen at Retevis. She wrote,

I am responsible for the radio review cooperation. We have a SDR radio HS2 for review cooperation. Are you willing to test and write a blog about it?

When I asked her what that meant, she said that she would send me an Ailunce HS2 SDR Radio, if I would review it here on my blog. When I told her that I would be brutally honest in my review, she seemed OK with that and sent me the radio.

What follows is an honest review. It’s not a QST-style review. I don’t have the test equipment that they do, nor did I have the time to put the radio through all its paces. Even so, I did operate the radio on HF and VHF, phone and CW, enough to make the review worth reading, I think.

If you don’t want to read the rest of this review, I can sum it up as follows: The Ailunce HS2 is a fun, little radio, with lots of potential. It’s not perfect, though. The buttons are too small, the display is too small, and the manual needs work. More about all those below.

What’s in the box?

As you can see below, the radio came with a handheld microphone, a DC power cord, and a USB cable.

First impressions:

  • It’s really small. It’s 45 mm H x 120 mm W x 190 mm D (1.77 in H x 4.72 in W x 7.5 in D)
  • The carrying case is kind of nifty. If you’re going to operate portable, it’s nice to have.
  • The extruded metal case include a nice heat sink.
  • There are a lot of connectors on the rear panel, including the power connector, an SO-239 for HF and VHF antennas, an SMA for a GPS antenna, two USB connectors, an Ethernet connector, and four 3 mm phone jacks.

Continue reading on KB6NU’s website…

Field Reports, Morse Code, News, Portable, POTA, QRP, QRPp, Videos

QRPp: Activate a park with ⅒ of a watt–? I had to at least try!

33 Comments

In my last published field report, you might recall that I successfully activated a park using 500 milliwatts or ½ of a watt. I was so surprised by the results of using this QRPp power level I immediately made plans to push the power level even lower during my next activation.

Let’s face it, I was drunk with a lack of power!

QRPp

After my last field report, there were quite a few questions about the term QRPp and what it means. To be honest, I’m not sure if there’s an “official” definition, but here’s what is widely accepted as QRP power categories:

  • QRP: 5 watts to 1 watt (for some contest 10 watts = SSB QRP)
  • QRPp: Less than 1 watt to 100 mw
  • QRPpp: Less than 100mw

I don’t own a field radio that allows me to lower the output power to QRPpp levels. In fact, few of my radios actually allow me to lower power below one watt.

 

My Elecraft radios, however, do allow me to lower power output to as low as 0.1 watts or 100 milliwatts.

The plan

On Wednesday, December 7, 2022, my travel schedule shifted and it opened up the entire afternoon to play radio.

A rarity indeed!

It was very rainy and foggy that day and I didn’t have my ENO rain fly with me, so I decided to visit a park with a good picnic shelter to keep me, an my gear, nice and dry.

Fort Dobbs State Historic Site (K-6839)

I had four park options with covered picnic shelters within a 45 minute drive. I decided that I would try to activate Fort Dobbs State Historic (since it had been a couple months since I’d visited) and Lake Norman State Park would be my back-up plan.

Fort Dobbs is a small park, so I called in advanced and asked for permission to do the activation and also asked if their picnic shelter was reserved.

The rangers there know me, so the phone call was pretty quick–no need to explain POTA nor my motivations. They told me that on rainy/foggy December days they have so few guests that I was welcome to use the picnic shelter or even the entire park if I wished (perhaps an ideal time to erect a Rhombic antenna–okay, just kidding!).

The Dobbs park rangers an volunteers are the best!

Setting up

On the way to the site, I decided that I would deploy my MM0OPX end-fed half-wave I’d cut for 40 meters.

I needed to make the most of my 100 milliwatts, so I figured the MM0OPX EFHW would be the best antenna for the job. Continue reading QRPp: Activate a park with ⅒ of a watt–? I had to at least try! →

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

Guest Post: Recipe for a Failed Activation in Allegheny National Forest?

13 Comments

Many thanks to Brian (K3ES) who shares the following field report:

Recipe for a Failed Activation at K-0619?

by Brian (K3ES)

A couple of days before Christmas, high winds came, temperatures dropped, and 3 inches of snow made a real nuisance of itself by blowing around and re-covering anything that was swept or shoveled. With daily high temperatures below zero (Fahrenheit) and wind gusts over 40 miles per hour, the weather just didn’t make for much fun outdoors. In fact, we hunkered down and didn’t get beyond the end of the driveway for four days. So when the winds calmed and temperatures rose, I really needed to get out of the house for a bit. What better way than to walk up the road and activate K-0619? Even with temperatures in the low 20s, I should be able to finish a quick activation. And so it was planned…

Of course just before walking out the door, it is always prudent to check on band conditions…

What did the sun just do to me, and how will I ever make 10 contacts on 5 watts before my fingers freeze???

Alright, I really need my outdoor time. Even if it means that I fail to activate the park this time, I’m going for it!!!

I walked down the driveway…

Off to the woods we go…

…up the road…

Fortunately the hike is less than ½ mile…
K-0619, Allegheny National Forest…

… and into the woods.

Snowy, peaceful, and lots of trees to support my antenna.

After getting to my spot, I set up my chair, laid out a trash bag to keep radio gear out of the snow, threw a line over a tree branch (it took two tries), and rigged the antenna. Continue reading Guest Post: Recipe for a Failed Activation in Allegheny National Forest? →

Field Reports, Morse Code, News, Portable, POTA, QRP, QRP Radios, QRPp, Videos

POTA with 500 milliwatts CW and 10 watts SSB using the Elecraft KX2 and PackTenna Random Wire combo

17 Comments

I’d like to start this field report with a side story. I’ll keep this reader anonymous since I haven’t asked for permission to post his story (although I’m certain he wouldn’t mind!):

A QRP Christmas Gift

Yesterday, I was contacted by a reader who had just received an amazing gift.

On Christmas morning, his wife presented him with a tiny wrapped box and inside there was a small note:

“Get yourself a great field radio. You have Carte Blanche!” 

What an amazing gift…right–?! She literally said Carte Blanche!

Evidently, she is familiar with my YouTube channel  (poor thing) because he often watches my activation videos on their living room TV. [Between us, I’m a bit surprised she still loves him after subjecting her to my videos.]

She told him, “Run your choice by Thomas before ordering.”

The funny bit? He approached me with this very question in November as he plotted a 2023 radio purchase. He couldn’t decide between the Icom IC-705 and the Elecraft KX2.

He wrote yesterday to tell me that he placed an order for a new Elecraft KX2 with all the trimmings; Elecraft’s KX2 “Shack-In-A-Box” package plus a set of KXPD2 paddles.

The KX2 is back-ordered due to parts availability, so he won’t receive his unit for several months, most likely.

Based on his operating style, I think he chose wisely. The IC-705 is a benchmark field radio, but he was looking for something that he could pair with a random wire antenna (the ‘705 lacks an internal ATU) and that would be easy to use on SOTA activations. He’s new to CW as well and loved the fact that the KXPD2 paddles attach to the front of the KX2.

Why do I mention this story? Because it’s not only fresh on my mind, but it’s the same radio and antenna I used during an activation on Thursday, December 1, 2022.

Tuttle Educational State Forest (K-4861)

As I pulled into Tuttle’s parking area that day I had a tried-and-true field radio kit pairing in my pack: my Elecraft KX2 and PackTenna 9:1 Random Wire antenna.

As I mention at the start of my activation video (see below), with the Elecraft KX2 and a random wire, I could easily activate all of the summits, parks, and islands I desire. It’s such an effective, flexible, and portable combo.

QRPp

To shake things up, I decided to knock the output power of the KX2 down to one half of one watt–500 milliwatts–at least for the CW portion of my activation.

Why not?

Plus, I don’t think I’ve ever validated a POTA activation with 1/2 of a watt, so it might make for a fun challenge! Continue reading POTA with 500 milliwatts CW and 10 watts SSB using the Elecraft KX2 and PackTenna Random Wire combo →

Field Radio Kits, QRP, QRP Radios

Allen’s 22.5 ounce, super affordable, QCX field kit

6 Comments

Many thanks to Allen (N4NN) who writes:

Hello Thomas,

Enjoyed your last video with the QCX-mini as it reminded me of my first portable setup.

Last August, I celebrated my fifth year as a ham and at 74 I’m still able to do some backpacking. This was my first attempt at taking a radio along. The QCX-original was the only model at the time and sold for $49 + shipping. The case is a dollar store pencil box with the radio mounted on stand-offs.

I changed the antenna you see to K6ARK EFHW setup with counterpoise. No coax. I used the on-board key. The throw line was arbor line much like yours and my weight was the tent peg pouch filled with rocks from the camp site. This was my food bag hanging setup. Under $100 for everything.

Before I used it much I discovered POTA from you and purchased a KX2. Haven’t camped much lately but I have activated 70 of Georgia’s 203 parks and having a ball!

[I should note that a] few years back when I made the kit, prices were lower so it may be more difficult to hit that $100 mark. For example, a QCX-mini (no case) runs $57.79 and the QRPGuys EFHW kit is now $30. Adam’s (K6ARK) EFHW kit I changed to is only $20. The “water resistant “ pencil case is still $1! I was more interested in weight rather than cost and as shown the weight is 22.5 ounces.

Thanks Thomas and wish you and yours a Merry Christmas and peace and good health in the coming year.

Allen

72
Allen
N4NN

I love it, Allen! Pure QRP fun on a shoestring budget. Not bad at all! You make a good point here that many kits can be built into a waterproof (or in your case a water resistant) case. I’ve often wanted to do this myself and may very well one day! 

Thank you for sharing!

Announcements, News, QRP, QRP Radios

End of an Era: The Yaesu FT-818ND is being discontinued…

43 Comments

Many thanks to Gavin (GM0WDD), followed by a number of other readers, who shared breaking news that both the Yaesu FT-818ND and the Yaesu FTM-400XDR are being discontinued due to parts availability.

The following announcement originally appeared on the Difona Communications Gmbh page on Facebook:

I suspect there will be a rush on remaining Yaesu FT-818ND stock. The 817 and 818 have been in production for well over two decades!  It’s one of my favorite QRP radios and certainly one I recommend.

Indeed, if you haven’t read it already, check out this article I posted only two months ago detailing why I think the 818 is such an enduring radio.

UPDATE: Many thanks to K4FBI who shares this announcement from Yaesu USA:

https://youtu.be/8p_HNsAYZxY

Field Reports, News, Portable, POTA, QRP, SSB

A QRP SSB POTA activation using only the Elecraft KX2’s internal microphone!

3 Comments

Once I started doing CW POTA activations in 2020, there really was no going back.

It’s hard to explain, but CW makes POTA and SOTA activations so much easier, in my opinion.

I’m sure many who’ve ventured down the path of CW understand.  I know devoted SSB operators who started doing CW in the field and pretty much permanently switched to CW. Indeed, that was me.

That said, I do like SSB as well and it has some positives over CW in terms of POTA.

For one thing, there are so many more SSB hunters out there (compared with CW); even on a slow POTA today, you can still amass large pileups. The cadence of SSB exchanges is also faster than that of POTA CW exchanges (which rarely exceed 20 WPM) so it’s easy to log two or even three times the number of contacts in the same amount of time.

In addition–let’s face it–it’s also fun hearing another operator’s voice on the other end.

Many readers have been asking me to do more SSB activations and I’ve been meaning to. Truth is, though, the majority of my field radios are CW-only, so when I have them in tow, SSB simply isn’t an option.

Tuttle Educational State Forest (K-4861)

On Thursday, November 17, 2022, I stopped by Tuttle Educational State Forest for a short hike and, of course, an activation.

It was during my hike that I came up with the idea to do a five watt SSB activation. I quickly realized, though, that the only radio in my car with SSB capabilities was the Elecraft KX2, but I didn’t have a hand mic or headset packed!

Fortunately, the KX2 has a built-in microphone for SSB. It’s not as ideal as my Elecraft/Heil Pro Set, nor even the basic Elecraft hand mic, but it works, so I thought it might be fun to do an entire SSB activation only using the KX2 internal microphone!

Setting up

There’s not a lot to set up when using a KX2; the radio has an internal battery, internal ATU, and since I was using the internal mic, all I needed was an antenna and some feed line.

I chose the KM4ACK 40 meter end-fed half-wave that I built from a kit many moons ago. I hadn’t deployed this particular antenna in the field in ages–it’s a good one, though! Continue reading A QRP SSB POTA activation using only the Elecraft KX2’s internal microphone! →

Articles, Morse Code, NPOTA, People

BBC Radio 4 – Lights Out: Call Signs

8 Comments


My dear friend, Volodymyr Gurtovy (US7IGN), has been featured in another brilliant documentary on BBC Radio 4 called Call Signs.

This documentary was produced by the talented Cicely Fell with Falling Tree productions for BBC Radio 4. Note that Cicely also produced a BBC Radio 4 Short Cuts earlier this year featuring Vlad as well. Enjoy:

BBC Radio 4 Lights Out: Call Signs

A man, a Mouse and a morse key: the story of a radio amateur in Kyiv as the Russian invasion unfolds.

When his wife and two children flee Kyiv to escape the war, Volodymyr Gurtovy (call sign US7IGN) stays behind in their apartment with only his radios and the family hamster, Mouse, for company.

Before the war, he used to go deep into the pine forests, spinning intricate webs of treetop antennas using a fishing rod, catching signals from radio amateurs in distant countries.

Prohibited by martial law from sending messages, he becomes a listener, intercepting conversations of Russian pilots and warning his neighbours to hide in shelters well before the sirens sound. After three months of silence, he begins transmitting again. Switching his lawyer’s suit for a soldering iron, he runs a radio surgery for his friends and neighbours, dusting off old shortwave receivers and bringing them back to life.

During air raids, he hides behind the thickest wall in his apartment, close to his radios, their flickering amber lights opening a window to another world. A story of sending and receiving signals from within the darkness of the Kyiv blackout.

Music: Ollie Chubb (8ctavius)
Producer: Cicely Fell
A Falling Tree production for BBC Radio 4

Listen to Call Signs on BBC Sounds by clicking here, or via the embedded player below:

 

Antennas, Guest Posts, News, Portable, Reviews

Guest Post: Reviewing the Chelegance MC-750 (Part 1)

10 Comments

Many thanks to Charles (KW6G) who shares the following guest post:

Product Review: Chelegance MC-750 Portable Ground Plane Antenna, Part 1

by Charles Ahlgren, KW6G

I recently purchased a Chelegance MC-750 portable ground plane antenna from DX Engineering.  Essentially, the antenna system provides a ¼ wave portable vertical antenna with 4 counterpoise wires that operates on 20 through 10 meters.  The antenna will also operate on 40 meters with the provided loading coil.  The manual states the antenna will support 6 meter operation, but no instructions are provided on how to do so.  30 meter operation is not supported.   It appears from our initial testing that no ATU is required.

Here are some of my thoughts on the antenna.

Product Description

The MC-750 comes with the following components:

  • GROUND ROD / ANT BASE
  • 50 CM ANT ARM
  • 5.2 M WHIP
  • 7 MHZ COIL
  • 4  COUNTERPOISE WIRES (radials)
  • COUNTERPOISE WIRE COLLECTOR BOARD
  • CARRY BAG

As provided, it is designed to operate on  the 40, 20, 17, 15, 12, and 10 meter bands without any modifications.  Six meters is also supported per the manufacturers manual, but no guidance on how to do that is offered in that document.   However, finding the proper length of radiator for 6 meters should be straightforward using a tape measure to set the proper whip length.

[Update: Chelegance notes that to operate 6 meters, simply extend the last segment only of the whip (see photo) and for 30 meters extend the last four segments of the whip and 15cm on the 5th segment (see photo).]

I checked the ground rod / antenna base with a magnet and confirmed it is made from stainless steel as both components are not magnetic; a characteristic of stainless.   Both the ground rod/ antenna base and the 50 cm antenna arm (which was also non-magnetic) had a hefty feel (together, they weigh about 2 pounds), therefore I think it safe to assume that these components are made of stainless steel.  Since most ops will undoubtedly use the antenna arm as an aid to inserting / extracting the ground rod into / from the ground, it seems a prudent decision by the manufacturer to have this piece fabricated from a strong, stiff  material such as steel.  The machine work used to fabricate these parts appears to be quite good – the fit and feel were excellent, with no sharp or ragged edges to cause problems in the field.

I measured the whip while set at the various position marks for 20 through 10 meters.  The band markings on the whip were accurate – giving a 1/4 wavelength radiator when combined with the 50 CM ant arm length…On 40 meters, the whip and rod measured about 1/8 wavelength.  The required the loading coil needs to be inserted between the whip and the rod (at approximately 1/10 the total 40 meter whip height above the base).  If you want to operate this antenna on 30 meters, it appears that you need to provide an extra 1.4  meter of additional rod as a quarter wavelength ground plane at 10.1 MHz  requires a 7.1  meter radiator.  Six meter operation would require a whip of around 4.7 feet.  With the whip fully collapsed, the length of the rod and antenna arm measures 40-1/4”.  Therefore, if 6 meter operation is contemplated, extending the whip about 16 inches from fully collapsed should suffice.  However, I don’t think that an antenna configuration such as that would be a very good performer unless it were elevated from ground level; or maybe it would be good for a SOTA activation? Continue reading Guest Post: Reviewing the Chelegance MC-750 (Part 1) →