Hamcation Treasure: Mike discovers and restores a mystery key!

Many thanks to Mike (VE3MKX) who writes:

Hi Everyone,

While at Hamcation (a great event) this year, I picked up this little Gem. It was found at one of the club tables located inside the Swaps building. When I saw it, I said, ‘wow…way cool!’

It didn’t have any markings on it and the seller said he thinks it was home made.

The hamfest bartering fun then began. He wanted $40 for it and me, being the cheaper than usual Ham, I said
‘How much do you want for this $30 dirty old key ‘ ?? He laughed but did not budge on the price.

Being from the North I calculated the price with the 35% currency exchange rate.

So I started to hem and haw….it was one of those…. Do I buy it or not. I’d kick myself after if I didn’t !!

I bought it and I’m glad I did !

After my southern vacation, I placed it on the bench for the restoration that was about to begin.

 

I took apart the key taking various pictures along the way so I wouldn’t have anything placed in the wrong spot or left over. Even something as simple as fastener lengths could make a difference placed in different spots.

I got out the Brasso cleaner, fibre cloth, Q tips, and rubber gloves. In hindsight, it might have worked better cleaning with a toothbrush. I’ll save that idea for next time!

Once the key was totally dismantled, I inspected all the parts. The black base was too far gone with scratches and chips to restore to my liking.

So I then took some 220 grit sandpaper and gave the base the once over. I went over to the local Walmart and picked up some flat black Rustoleum spray paint.

I was expecting a true flat dull black finish. What I finished with was like a flat egg shell black which to my surprise I like a lot better!

After each coat of paint (letting it dry for 24 hrs ) I then did a quick sanding with 220 grit water paper. So after three coats of paint it was done !

The key came with very small wooden finger paddles. I wasn’t a fan of those because of the size and shape. So I went into my junk drawer–sorry, my ‘ham radio treasure collection’–and found a pair of spare Begali finger paddles.

These finger paddles were acquired a few years back at Dayton, another fantastic don’t miss event ! With a little cutting I made these fit onto the cleaned brass arms of the new key.

The key was then reassembled. One thing that I did do while reassembling was to wear gloves, so I wouldn’t leave fingerprints all over the freshly restored key.

I also gave the swivel arms a few drops of WD40 which would prevent any sticking.

The reassembly went fine. The overall project took a few days to complete. I did place a small piece of cupboard lining rubber under the base of the key to prevent the key from moving on the desk when in use.

The key weighs about 5lbs, so it didn’t move much to begin with, but ya never know–!

Overall, the key has a very nice feel to it,

I still have some tweaking to do to get the paddle to my liking.
A was a fun little project.

If by chance you know anything about this key, please let me know !

Have a great day and see you at FDIM at Dayton !

72 Mike VE3MKX

Conf’ QRP: A new QRP gathering in France, May 18, 2024!

Many thanks to Yannig (F4IUJ), organizer of a new QRP conference in Rennes, France, who shares the following announcement and poster:

[Conf’ QRP] is going to take place in Rennes on the 18th of May of this year, there is more information on this page : https://ara35.fr/conf-qrp/

SSB Style: Mark pairs the Elecraft KX3 and AX1 for some challenging activations

Many thanks to by Mark (W2ITG) who shares the following field report:


Elecraft KX3/AX1 Field Report

by Mark (W2ITG)

I’m an avid POTA activator and wanted to try an experiment to see if I could complete an activation using just the Elecraft KX3 & AX1 on 40 & 20m SSB. I’ve seen others do it on CW but not on SSB. My CW learning is not going well by the way.

This was at K-1635 Washington Rock State Park 02-07-2024, with a beautiful view of the NYC skyline approximately 20 miles away.

My 1st attempt was a failure because I ran into SWR issues on 20m when I picked up the microphone & RF was getting into the audio as well. This was with the antenna mounted directly on the side of the radio using a 90 degree elbow connector, the AX1B bipod & an elevated radial connected to one of the case screws of the radio, unfortunately it didn’t work.

It’s a good thing I had brought along my Tuftln EFHW and telescopic carbon fiber fishing pole as well because it saved the day which allowed me to complete the activation. When activating make sure to have a backup plan, so far I have no incomplete activations.

Fast forward to 02-27-2024 I’m making another attempt but using a clamp mount, clamped on to the side of the picnic table, 25’ of ABR Industries RG-316 with built in CMC choke, the Elecraft AXT1 tripod adapter, and an elevated counterpoise.

I was much more successful, but barely. I did get my 10 contacts, 7 on 40m and 3 on 20m. This really took me by surprise as the AX1 is more of a compromise on 40 than it is on 20m.

Radio set up at a different picnic table.
This clamp mount was taken from one of my BuddiStick setups.
Notice the electric fence post in the background to elevate the counterpoise.
The QSO map, it took me an hour and a half to get these 10 contacts.

Using the AX1 was quite the challenge to say the least. It does prove that even with a very limited antenna you can make contacts. My guess as to why it didn’t work as well on 20m, is poor band conditions. Living in the very populated northeast is what I believe allowed me to make more contacts on 40m.

Would I recommend buying this antenna? Most definitely, just as long as you know what it’s limitations are. I will try another attempt, but by trying 2 elevated counterpoise wires instead of 1. This antenna can use all the help it can get.

KM4CFT’s Iambic Paddle Kit for the Elecraft KH1

Many thanks to Jonathan (KM4CFT) who notified me that his new KH1 iambic paddle kit is now available to order.

I know Jonathan has been working on this little key for a while and I’m pleased to see it come to fruition.

Click here to check it out on eBay via Dan (W7RF).

Note that this is an eBay partner link that also supports QRPer.com at no cost to you!

Elecraft KH1 Tabletop Mode: The new KHRA1 Right-Angle Adapter makes for a super-portable POTA machine!

It’s funny how sometimes one small accessory can have a huge impact on a field radio kit.

When I first learned about the Elecraft KH1 (basically, the day I was invited to join the volunteer testing group), I felt like Elecraft had designed my ideal QRP radio. The KH1 is super compact, weighs 13 oz completely loaded, covers my favorite bands, and has features I would expect in much pricier radios. It reminded me of my beloved KX1, but even more portable with more features.

The KH1 caters to handheld or pedestrian mobile operating–at least, that was the overarching design objective. It accomplishes this amazingly well. It’s so easy to operate handheld, and there’s nothing else quite like it on the market. I suspect that when others copy the design (I’m sure they’re already doing so–!) it won’t be as versatile, functional, and lightweight.

At the end of the day, though, I feel like I’m only using the KH1 pedestrian mobile about 30% of the time I have it on the air. Of that 30%, I’d say that only 10% of the time I’m pedestrian mobile while activating, and 20% of the time I’m doing little impromptu radio sessions in parking lots, ballparks, while visiting family, and even on my own mountain property.

While handheld operating is simply a game-changer, I knew I wouldn’t do this 100% of the time with the KH1. It’s for this reason that my very first bit of proper KH1 feedback to Elecraft, well before I had my hands on a prototype, was that a right-angle adapter for the whip antenna would truly round out the KH1’s field prowess.

This would basically give my KH1 the same functionality of my beloved KX2 and AX1 antenna combo, but in an even more portable package.

Turned out, Elecraft already had a right-angle adapter on the design board!

Fast-forward to present day…

Last week, Elecraft sent me a prototype of the right-angle adapter to test and evaluate. They’ve given it the model number KHRA1.

Full disclosure: Elecraft also gave me permission to post a video and article about this new accessory even though (at time of publishing) it’s not even showing up on their website. I will, however, link to it here as soon as Elecraft makes it available. This is an item I would otherwise have tested in private–thanks, Elecraft!

The KHRA1: Small accessory, big impact!

Illustration Source: Elecraft KHRA1 Instruction Manual

The KHRA1 is a simple adapter. Other than metal attachment hardware, most of it is lightweight and 3D-printed from a durable material (I assume the same material they use in the KH1).

Attaching it to the KH1 is very easy.

First, you unthread the large metal thumb nut from the KHRA1. You will need to hold together the remaining KHRA1 components (legs and attachment bracket) so that they don’t come apart before you attach them to the KH1. This is actually pretty easy to do, but users should know to follow the KHRA1 instruction sheet. If these parts fall apart in the field, it might require a bit of searching the ground for the pieces.

You simply thread the large thumb nut onto the KH1’s whip antenna antenna port, then thread the rest of the KHRA1 bracket/legs onto the large thumb nut.

Check out Elecraft’s illustration:

I then position the KHRA1 legs as shown above, then tighten the KHRA1 adapter so that everything is secure.

It’s super simple to do, and you can see this process in my activation video below.

Speaking of an activation…

On Saturday, March 2, 2024, (yes, only two days ago) I had my first small window of opportunity to squeeze in a POTA activation and test the KHRA1.

That day, my daughters and I had a number of errands to run, then a three-hour round-trip drive to pick up my wife. We were on a very tight schedule, but I had a 30-ish minute window of opportunity to fit in some POTA radio therapy.

I set my sights on the easiest-for-me-to-hit POTA site on the Blue Ridge Parkway: the Folk Art Center.

Amazingly, I discovered that morning, that the KHRA1 fits in my Pelican M40 Micro case along with my KH1, whip, counterpoise, key, spare N6ARA key, and earphones.

With the KHRA1, this means my M40 field kit can do both pedestrian mobile and tabletop operating. Woo hoo!

The weather that morning was simply glorious. A very wet front swept through the previous day leaving behind clear skies and warm temps. Frankly, it was a bit odd activating without wearing a jacket or hoodie.

Gear:

Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.

On The Air

Setting up was quick and easy, even though this was my first time using the KHRA1 in the field.

I hopped on the air and started calling CQ. Once spotted (for some reason the RBN auto-spotting feature wasn’t working again), the contacts started flowing in.

I worked a total of 18 contacts in 16 minutes. It hardly gets better than that for a CW activation!

I had to call QRT after my 18th contact. Even though I had a 30-minute window to POTA, nearly 14 minutes of that was taken up with my intro and summary for the activation video.

I called QRT with a small pileup still in place. I really hate doing that, but I had a schedule to keep!

QSO Map

Here’s what this five-watt activation with a 4′ telescoping whip antenna looked like when plotted out on a QSO Map:

Activation Video

Here’s my real-time, real-life video of the entire activation.  As with all of my videos, I don’t edit out any parts of the on-air activation time. In addition, I have monetization turned off on YouTube, although that doesn’t stop them from inserting ads before and after my videos.

Note that Patreon supporters can watch and even download this video 100% ad-free through Vimeo on my Patreon page:

Click here to view on YouTube.

A super-portable, low-impact POTA machine!

The KH1 works amazingly well as a tabletop radio when combined with the KHRA1 adapter.

At the end of the day, the KHRA1 is a very simple piece of hardware, but it effectively transforms the KH1 from a handheld radio to a tabletop.

Of course, I’ve used the KH1 numerous times with wire antennas in a tabletop configuration (I’m a massive fan of wire antennas) but the ability to use the 4′ whip antenna and internal KH1 loading coils means that I can operate anywhere I have a surface.

As I mentioned in a previous post, in some cases, low-impact, and low-profile are key to positive park relations.

Herein lies the thing I love about my KX2/AX1 pairing as well. It’s just with the KHRA1, the KH1 makes for an even smaller, lighter-weight field kit.

Any negatives? The only one I’ve come up with is that the KH1 is so lightweight that I realize I need to carry a small piece of shelf liner (something like this) to provide the KH1 with a bit more grip on a slick park table, especially those composite ones.

Again, I will update this post when Elecraft announces KHRA1 pricing and availability.

Thank you

I still can’t believe the entire kit fits in this small case. Even when I put the KHRA1 thumb screw on backwards!

Thank you for joining me on this quick little tabletop activation!

I hope you enjoyed the field report and my activation video as much as I enjoyed creating them!

Of course, 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.

As I mentioned before, the Patreon platform connected to Vimeo make it possible for me to share videos that are not only 100% ad-free, but also downloadable for offline viewing. The Vimeo account also serves as a third backup for my video files.

Thanks for spending part of your day with me!

Have an amazing week ahead and play some radio!

Cheers & 72,

Thomas (K4SWL)

Activating Silver Sands State Park by pairing the QRP Labs QDX and the FT8CN Android App!

FT8CN Field Report

By: Conrad Trautmann (N2YCH)

February 24, 2024

I successfully activated Silver Sands State Park, K-1716, for Parks on the Air using the FT8CN Android app and a QRP Labs QDX transceiver.  Here’s my field report.

Thinking about ways to further shrink down my mobile kit, I wondered if WSJT-X would run on a mobile phone. After some internet searching and reading various groups.io messages, I discovered that FT8CN is a digital modes app that runs on an Android device. It is also single wire compatible with the QRP Labs QDX transceiver carrying both the CAT control and audio. My goal was to see just how light and compact I could make my digital mode kit. Here’s a look…

Lenovo Android Tablet, QRP Labs QDX transceiver and a Bioenno BLF-1203AB 12V Battery

The Android device is a Lenovo Tab M8 (4th Gen), which can be found on Amazon [affiliate link]for about $80. It has an 8” screen, which is slightly larger than my mobile phone. I was happy to have the extra screen real estate since there’s a lot going on in the app and the size made it easy to see it all.

The FT8CN software can be found at N0BOY’s github site, https://github.com/N0BOY/FT8CN/releases. The most recent revision as of this writing is version 0.92. It’s an .apk file, which to install, you need to give your Android device permission to download via the browser. This is a direct download to the device and not going through the Google Play store, so it hasn’t gone through any security checks or validations. As with any of the software we use in ham radio, caveat emptor, or buyer beware. I would carefully consider this before downloading it to your primary mobile phone.

With that said, if you Google FT8CN, you’ll find plenty of videos and online resources to guide you on how to install it and set it up, so I won’t go into those details here. It’s fairly intuitive and each configurable field has an information button you can click for in-app instructions or explanations of what each does.

The Lenovo tablet has a single USB C port used for charging and connecting external devices, so I used a USB C to USB Type A adapter to connect to the QDX cable. Since this setup only requires a single wire, I plan to use a USB C to USB Type B cable so no adapter will be needed. For the first outing, it worked just fine this way.

The QDX’s on-board audio card and the transceiver control are all integrated into the application. It supports a number of popular transceivers including the QDX. When I connected the USB cable to the tablet, it automatically launched the application and presented a screen to click with the USB port. Once selected, the app displays a message saying the connection was successful.

I brought my Bioenno BLF-1203AB 12 volt battery to power the radio, which is actually larger than the QDX. That’s another opportunity for me to downsize the kit, finding a smaller LiFePo battery. I know some QDX owners use a standard  9 volt battery, that would certainly lighten the load. My QDX is built for 12 volts but it is possible to build it configured for 9 volts and still get full power out.

As pictured above, the entire setup was the 8” tablet, a USB cable connection to the QDX, a power cable from the battery to the QDX and an antenna cable. For the test, I used my Buddipole with a 17’ whip and counterpoise, which I knew would be resonant on 20 meters. I wanted to avoid needing to use a tuner. There is a compact tuner available which is about the same size as the QDX called the ATU-10, which works well if you need one and is about the same size as the QDX. I think it would be great to pair this kit with a Packtenna EFHW 20 meter wire antenna, which is also resonant and tiny enough to pack in a small bag with the rest of the kit.

Equipment List

Extra Items I brought for the test

I did a quick test of my antenna using the RigExpert antenna analyzer and at 14.074 MHz, I had 1.5:1 SWR, so I didn’t need to worry about damaging the final power amplifier on the QDX.

A windy day bending my vertical to one side at K-1716, Silver Sands State Park, Connecticut
AntScope shows a decent match at FT8 frequency.

Once everything was connected, I immediately started receiving stations. Here’s a screen shot of the decodes screen (below). The waterfall is on the left and decode list is on the right.  Odd and even cycles are easy to see with light and dark shading behind them. They are also labeled “0” and “1”.

I think one of the coolest features of this application is the labeling of the stations in the waterfall.

Here’s the same screenshot rotated to see the waterfall more easily.

You can see that the text of the stations calling CQ are a different color than the others. You can also see KS4YT calling CQ POTA. I always try to call other POTA activators when I see them to get the park to park QSO. When a station is calling you, the text is pink. Continue reading Activating Silver Sands State Park by pairing the QRP Labs QDX and the FT8CN Android App!

POTA is changing park prefixes and, in some cases, park numbers

I’ve just learned that the Parks On The Air (POTA) admin is in the process of cleaning up and reorganizing the way Programs, Locations, DX Entities, and Parks are stored in its database.

Many thanks to Alan (W2AEW) who shared a link to this document which explains what they’re doing and even links to logs as they implement these changes.

In short, this will have an effect on activators, especially, because there’s a decent chance you will be using a new park prefix, and in some cases, possibly new park numbers.

A number of POTA prefixes have changed already.

In fact, if you’re activating in Canada, you might have already noticed that the park prefix is no longer VE, but is now CA.

As an example, in my activator logbook, what was once VE-1596 (Hog’s Back Conservation Reserve) is now CA-1596.

Here in the States, the prefix will soon change from K to US.

These prefix changes will happen for many other countries as well.

Of course there’s nothing, as an activator or hunter, you need to do other than start using the new prefix when it has been implemented. All of your old logs will automatically update in the POTA system with the new prefixes and/or numbers.

It might take time for logging applications like HAMRS to adjust to new prefixes. Activators might need to use the old prefix while live-logging during an activation, then use a find/replace string in a text editor later to fix the ADIF file.

Again, check out this document on the POTA website which goes into much more detail.

Thanks again, Alan, for the tip!

QMX – From Kit to Field!

by Matt (W6CSN)

The Radio

The QMX by QRP Labs is a five band, multi-mode radio introduced by Hans Summers G0UPL at FDIM in 2023. The QMX is the next logical step in the radio development journey at QRP Labs, bringing together the innovative approach to FSK modes like FT8 from the QDX and the CW performance of the QCX series. This is all done in same enclosure as the QCX-Mini which is not much larger than a deck of playing cards.

Size of the QMX compared to standard deck of playing cards.
The QMX is about the size of a deck of cards.

The keen observer will notice that the QMX also sports a built-in microphone which, along with associated circuitry, supports future introduction of voice modes by way of firmware update. Other notable features include SWR metering with protection as well as solid-state “PIN” diode T/R switching, plus the option for “high band” coverage of 20 through 10 meters in addition to the original 80m-20m version.

Most hams have, at one point or other, forgotten to throw the antenna switch, adjust the tuner, or even connect an antenna before transmitting. The SWR meter and protection really sets the QMX apart from earlier QRP Labs radios. There are plenty of sad tales on the QRP-Labs forums from QCX or QDX users that “smoked” the BS170 mosfet finals in a moment of operating into a badly mismatched load. It’s remarkably easy to do, ask me how I know!

The Build

Based on experience with the QCX-Mini and having put together several QDX’s, I admit to being hesitant to starting assembly of this radio. The level of integration in the QMX as a multi-band, multi-mode unit is probably the highest yet to come out of QRP Labs. The components that were merely small in earlier radios are absolutely tiny in the QMX, specifically the LPF toroidal cores. The main board, internal switching power supplies, display, and controls board are all sandwiched together in a tight fit for the custom enclosure.

photo showing a partially completed circuit board
Most of the electronic components installed on the main board.

The build started with a slow and methodical approach of doing a little bit each day and working in the morning when my mind was fresh and there was good light on my workbench, a.k.a. the dining room table.

The first “disaster” happened when performing the factory recommended modification to Revision 2 boards shipped in 2023. The mod calls for a protection diode to be installed across a SMD mosfet. Several leaded 1N4148 diodes were available in my “junque” box so I attempted to carefully fit one of these in the right position on the board. While soldering the diode in place I managed to lift C508, a microscopic .1uF SMD capacitor, clean off the board!

photo of circuit board with modifications
The suggested modification adding a protection diode.

Given the tools at my disposal, there was no way I was going to be able to get that capacitor back into place. Therefore, I grabbed a standard through hole .1uF cap and painstakingly got it connected in the right place, verified by lots of continuity testing.

Once finished with all the electronic components on the main board, I was feeling pretty cocky and also the completion of the project was more clearly in view. The cautious and methodical approach gave way to a faster build pace, which directly lead to the second “disaster.” While installing the headers that connect the main board to the display board, I failed to CAREFULLY READ THE ASSEMBLY MANUAL and soldered the male pin headers where I should have installed the female sockets!

This misstep might have ended the project right then and there if I had not at some point in the last year bought a proper desoldering tool. This is not an expensive automatic vacuum pump powered solder re-work stations, but rather a heating tip and manually actuated solder sucker built into one tool. Twenty-two unsoldered connections later, we were back on track. Continue reading QMX – From Kit to Field!

The POTA Babe Goes Fishing (Sort of)

Parks on the Air offers a diversity of properties. In addition to those that commonly come to mind like state parks, forests, and national wildlife refuges, there are wildlife management areas (WMA) about which I’ve written and fishing lakes. This past week the POTA Babe visited Evans County Fishing Lake (K-7464) here in Georgia.

Source: Google Maps

The drive to the property was pleasant and relatively quick. On the way, I drove through the town of Pembroke. According to Wikipedia, this small community was a railroad town and turpentine shipping center and named after an early resident, Pembroke Whitfield Williams.

I took to heart Thomas’ advice in his recent post “Building Positive Park Relations” and contacted the office managing the property before my visit. I spoke with an employee who confirmed they had no problem with me putting a temporary antenna in a tree at any of the properties that district office manages. I also made a point to introduce myself to the DNR employee on site when I arrived. As soon as I said the words “ham radio operator”, he responded that they love having ham radio folks on the property! (Kudos to all those who have activated there before and were good ambassadors for our hobby.)

park office

Fisherman enjoying the gorgeous day

As I did for the Hiltonia WMA activation, I checked the satellite view of the property on Google Maps beforehand. There are three lakes with Bidd Sands Lake being the largest. (Bidd Sands is named after a beloved member of the local community who gave his life in Vietnam  in support of the men he was leading.) At the east end of the lake is a dyke. That seemed a great place to set up, partially because of the openness but also I was likely to not be in anyone’s way.

Source: https://georgiawildlife.com/evans-county-pfa
Source: Google Maps
Close-up view of the dyke. Source: Google Maps

It was still rather chilly despite the sunny sky overhead so I chose to operate from the car rather than set up my Helinox chair and be out in the open. At the end of the dyke was a large oak tree just begging for the Tufteln EFRW antenna. I had the new Chelegance MC-750 with me but I’ve grown partial to putting antennas in trees. I love the flexibility of effortlessly changing from one band to the other without adjusting a whip and/or counterpoise as you have to do with a vertical. Continue reading The POTA Babe Goes Fishing (Sort of)

QRPer Notes: One CW Question, CW Haptic Device, and Easy Elecraft KX2 FT8 & FT4

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 another QRPer Notes, a collection of links to interesting stories and tips making waves in the world of radio!


VE6LK’s “One CW Question” YouTube Series

My good friend, Vince (VE6LK), came up with a great idea a few weeks ago: reach out to CW ops and ask one question that might help newcomers to Morse Code. Each video is 2-3 minutes long and features a number of ham radio operators who operate CW (I’m chuffed to be one of them).  I’ve learned something from each of these videos. Click here for the full playlist, or start watching via the embedded player below:


LICWC CW Haptic Device

Many thanks to Perry (N5PJ) who shares this video from Kyle (AA0Z):


Simple FT8/FT4 via a KX2 and iPhone

Many thanks to Jason (KD9ZHF) who shares the following video from Mark (KD7DTS):

QRP radios, product announcements, reviews, news and more. Low power amateur radio fun!