As promised, here’s Part 2 of my extended HRWBOTA activation report from March 16, 2025!
(US-6856)
As I mentioned in Part 1 of this activation, I’d planned to operate for the full four-hour window of the March 16th Ham Radio Workbenches On The Air (HRWBOTA) event—a rare luxury for me. Most of my field activations typically last anywhere from 30 to maybe 90 minutes at most. So, sitting in one spot and operating for four full hours definitely stretched me a bit—but in a good way!
After two hours of non-stop CW with the Elecraft KX3, I took a brief break, swapped radios, and continued the activation with my Penntek TR-45L.
This portable rig is one of my favorite minimalist CW transceivers, and I thought it was a perfect fit for the second half of the HRWBOTA event. I used it to work 20, 30, and 40 meters in CW (in that order).
One nice bonus of using the TR-45L is that mine has a built-in Z-match ATU, which allowed me to easily find a match on 30 meters, even though the Spooltenna EFHW isn’t resonant on that band. The antenna was the same excellent 40-meter EFHW prototype from Rob (KO4HUI) that I featured in Part 1.
The only other minor change during this segment of the activation was behind the camera. Since I was filming in real-time for four straight hours, I had to pause at one point to connect my action camera to a portable battery pack which then limited my ability to use wireless microphones with wind screens. The gusty wind will be more noticeable in this portion of the activation video as a result—but, hey, it’s all part of the field experience!
Now, let’s dive into Part 2 of the gear and activation details…
Gear
Note: All Amazon, CW Morse, ABR, Chelegance, Spooltenna, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.
Radio
Penntek TR-45L with built-in rechargeable battery and Z-Match antenna tuner (discontinued)
As I mentioned in Part 1, this was a longer activation, and since I needed to submit electronic logs to HRWBOTA admin Mark (N6MTS), I skipped paper logging—a true rarity for me.
Instead, I logged directly into AC Log on my Microsoft Surface Go, just as I would during Field Day.
Unfortunately, I had one scheduling conflict I couldn’t change, which meant starting the event with my KH1 in a downtown Asheville parking lot before heading to Lake James State Park for a couple of hours of solid pileups with my Icom IC-705. I posted a field report and video of the event—it was a blast! Click here to check it out.
On March 16, 2025, we held our second HRWBOTA event, and this time, I was better prepared with a clear schedule and a plan to operate for the full four hours!
Zebulon Vance Birthplace (US-6856)
Of course, even the best-laid plans can run into hiccups, and mine did. I was delayed due to some chainsaw work I wanted to complete before leaving home. As a result, I arrived at US-6856 just as the event was starting (14:00 local).
No worries, though! I turned on the camera and wasted no time deploying my antenna and setting up my radio gear.
The Spooltenna!
For this activation, I used a prototype of the Spooltenna, designed by Rob (KO4HUI).
Rob, a fellow North Carolinian, had been in touch with me about his antenna idea for months. Back in February, when my daughter interviewed for a scholarship at NC State University (which she was later awarded!), I met up with Rob on campus, and he handed me an early prototype of the Spooltenna. He had just completed the build that very morning.
It’s a unique design based on his own needs for a field antenna. From his website:
SPOOLTENNA is a compact, lightweight antenna designed for portable amateur radio operations like Parks on the Air® (POTA) and Summits on the Air™ (SOTA). Its innovative spool form factor is intended to ensure efficient deployment, teardown, and storage, providing a frustration-free operating experience that doesn’t compromise performance.
The design is also Open Source under a Creative Commons Attribution-ShareAlike 4.0 International License.
The Spooltenna he gave me is a 40-meter end-fed half-wave (EFHW). Before this activation, I had only set it up at home to check resonance on 40, 20, 15, and 10 meters. I deployed it as a sloper, with the transformer at the highest point.
The Spooltenna is quick to deploy–by placing a pencil, tent stake, or screwdriver in the center hole–and the spool design ensures a tangle-free wind-up. The components feel very high-quality. Rob is also producing high-quality cable assemblies, which were included in the package he gave me.
Rob has rapidly turned this idea into a side business involving his whole family. In just two months, his wife Christi has launched a website, ordered inventory, and—just a week ago—even set up an affiliate program and coupon code offering free shipping to QRPer.com readers.
UPDATE: Rob tells me that he will have some inventory at RARSfest this weekend and will even temporarily open up his website for Spooltenna orders tomorrow (Saturday, April 4, 2025) during the RARSfest.
Again, I’m most impressed with all that he and his wife have accomplished in a few months.
Deploying the Spooltenna was easy, though I had to adjust my setup. I originally planned to support the transformer with a tree next to the picnic shelter, but that tree had been blown down during Hurricane Helene.
No worries! I set it up as a sloper with the transformer close to the ground—similar to many of my EFHW deployments.
My HRWBOTA Activation Plan
I planned to use two radios during this activation—first my Elecraft KX3, then my Penntek TR-45L on the lower bands.
To maximize the chance for HRWB listeners to work me:
I did not spot myself on POTA.app, even though I was giving all contacts POTA credit. I knew that if I spotted myself, the normal weekend POTA pileups might make it harder for HRWBOTA participants to contact me.
I started on 10 meters and slowly worked my way down.
If time allowed, I planned to work SSB on at least one band (spoiler alert: CW kept me too busy!).
First up was the Elecraft KX3! I set up the radio and wasted no time getting on the air.
Gear:
Note: All Amazon, CW Morse, ABR, Chelegance, Spooltenna, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.
Since this was a long activation and I needed to submit electronic logs to HRWBOTA admin (Mark, N6MTS), I skipped paper logging. Instead, I logged directly to AC Log on my Microsoft Surface Go, just as I would during Field Day. Continue reading Ham Radio Workbenches On The Air Field Report: Part 1→
On Thursday, January 30, 2025, I did something I hadn’t done in months—I activated the Zebulon B. Vance Birthplace State Historic Site (US-6856).
Regular readers know that western North Carolina was hit hard by Hurricane Helene on September 27, 2024. The Vance Birthplace–nestled in the Reems Creek valley which experienced severe flooding–had been closed for months.
I hadn’t driven out that way post-Helene, assuming the worst. In general, I avoided traveling into affected areas unnecessarily to keep traffic light for those working on recovery efforts.
Recently, another local activator mentioned that the site had reopened. A quick call to the park confirmed that I was welcome to activate, so I packed up my gear and headed out.
Assessing the Site
Upon arrival, I was relieved to see that the site itself hadn’t sustained significant flood damage. There were several downed trees, including a few that hadn’t yet been cleared, but the picnic shelter—the spot I usually operate from—was in great shape. Two large trees had fallen near it, but thankfully, the structure remained unscathed.
For this activation, I opted to use my Chelegance MC-750 self-supporting vertical antenna rather than relying on one of the remaining trees.
Setup
I was so eager to get on the air that I nearly set up the antenna before starting my activation video. Fortunately, I caught myself just in time, grabbed the camera, and recorded the process.
Setting up the MC-750 was simple. I extended the stainless whip to a quarter-wave length on 20 meters, deployed the four counterpoise wires, and connected the feedline to my radio.
I brought my Penntek TR-45L (full-size version) for this activation, and setup was minimal. With its large internal battery, I only needed to ensure the Z-Match tuner was in bypass mode, plug in the antenna and key, and I was ready to go.
Originally, I planned to test a new prototype paddle that had recently arrived. However, the left paddle wasn’t functioning consistently. (After the activation, I discovered a bonding issue between two contact points—mystery solved!) I quickly swapped in my CW Morse double paddle, which I always keep as a backup.
With my logs in place, it was time to hit the air!
Gear:
Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.
Radio
Penntek TR-45L with optional Z-Match tuner and internal battery (note: this item has been discontinued)
Please note that this POTA (Parks On The Air) activation took place on September 19, 2024—eight days before Hurricane Helene devastated western North Carolina. This is one of a few field reports and activation videos I’ll be sharing that took place before Helene’s arrival.
As I mentioned in my last field report, I haven’t been back to the Vance State Historic Site since the storm, as it’s been closed. Located in the Reems Creek valley, the site likely experienced extensive flooding. I hope this park can recover and reopen soon.
I hope you enjoy this field report and activation video. I’ve thoroughly enjoyed reliving it while preparing this for you.
Thank you! Thomas (K4SWL)
On Thursday, September 19, 2024, I made time for a POTA activation at the Zebulon Vance Birthplace (US-6856) and brought along a few new items to make it even more interesting.
New Pack
I packed my new gear along with extra equipment to fill out my new Nemo Resolve 25L backpack (check it out in gear links below). I wanted to see how well it could handle a full load and how comfortable it would be to carry.
Turns out, it’s very comfortable, and I could easily fit more in this pack than I’d likely ever need. It’s a keeper.
New QMX
First, I brought along a new QRP Labs QMX transceiver. If you’ve been a long-time reader, you’ll know I’ve had a QMX for about a year and think it’s a brilliant little radio. This one, however, is the “high band” version, meaning it covers 20-10 meters. My other QMX is the “low band” version, covering 80-20 meters.
As soon as the high band QMX was announced by QRP Labs, I grabbed one. I purchased an assembled version, knowing it could be a year (or much longer) before I’d have time to actually build one.
When I received this new QMX—I’m not sure, months ago?—I tucked it away in a drawer while reorganizing my shack, then promptly forgot about it (in my defense, I had a crazy year). I eventually rediscovered it, and here we are!
I’d been looking forward to taking it to the field.
New Carbon Fiber Mast
At Hamvention this year (2024), I ran into my good friend Mike Roberge (KE8PTX). He told me he was super excited about a new product that had been showcased—not a flagship radio or similar, but the Explorer POTA20Carbon Fiber Mast.
Mike was one of the very few people who actually purchased one at Hamvention to take home. I believe Gigaparts only had two or three on hand—mainly for demo—so everyone else had to place an order and wait 6-8 weeks for the first shipment.
Meanwhile, Mike, being the clever fellow he is, designed a 3D-printed ground spike holder that fits a tent stake. This allows the user to unscrew the base cap of the Explorer mast, insert Mike’s ground spike, and support the mast without needing guy wires, etc.
I purchased my Explorer pole via Gigapart’s online store during or right after Hamvention. I didn’t receive my mast until sometime in August. This activation was the first time I tried it out in the field.
I deployed my 20M EFHW (built on a TennTennas transformer) by attaching one end to the tip of the Explorer pole, then sloping it down so the feedpoint was close to the edge of the picnic shelter at Vance.
K3ES’s Grippy Pressure Paddle
Another item I rediscovered in September was a VK3IL pressure paddle my good friend Brian (K3ES) gave me at Four Days in May during Hamvention. His version is a standard VK3IL pressure paddle, but with some padded material under the heat shrink, making it easier for big hands to grip.
Brian’s paddle paired nicely with the QMX!
With everything set up, it was time to hit the air.
Gear:
Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.
The QMX, of course, performed well during this activation.
I did encounter some difficulties at the beginning when the QMX produced significant audio pops in the CW sidetone audio whenever I keyed the radio. I spent a few minutes troubleshooting and even changed speakers, thinking it might have been an issue with the Soundcore Mini.
It turned out to be related to toggling the AGC function. I eventually managed to resolve the audio pops and used the Soundcore Mini. I’m not sure I could replicate the process exactly, but I got it working. (If you’ve had a similar experience, I’d love your input.)
Otherwise, the activation went very smoothly.
I worked my first ten stations in eight minutes—woot!
Activity slowed down a bit after the first ten, but I still managed to work 17 stations in under half an hour.
Many thanks to everyone who hunted me!
QSO Map
Here’s what this five-watt activation looked like when plotted out on a QSO Map:
Screenshot
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.
I love that the Explorer mast fits easily in my Nemo backpack. I see myself using it a lot for SOTA and POTA activations where suspending an antenna in a tree isn’t possible.
It’s super lightweight and compact, and Mike’s ingenious tent stake spike mod makes this mast so easy to deploy.
I also enjoyed using Brian’s pressure paddle during this activation—thank you, OM! It’s comfortable to grip and use.
This high-band QMX will make a brilliant SOTA transceiver. I need to take advantage of these high bands while the ionosphere supports them this solar cycle!
Thank you
Thank you for joining me during this activation!
I hope you enjoyed the field report and my activation video as much as I enjoyed creating them!
Also, thank you for all of your recent support and kind messages following Hurricane Helene.
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 not a requirement, as my content will always be free, I really appreciate the support.
If you listened to the latest Ham Radio Workbench Podcast episode–our Field Day Debrief–you will have heard that my Field Day was a pretty low-key event.
Originally, I had hoped to fly out to Oregon and hang with my friend George (KJ6VU) and his radio club, but there were just too many family activities happening this year for me to travel for a week.
Instead, my wife, daughters, and I met up with my buddy Vlado (N3CZ) and his sister, who was visiting from North Macedonia.
We met at the Zebulon Vance Birthplace (US-6856) and, luckily, had the picnic shelter to ourselves. The weather was gorgeous, and we put together a proper potluck picnic.
Field Day POTA
Vlado and I decided to do some casual Field Day operating, and I brought the radio gear.
Since I’m currently testing the Xiegu X6200, I brought it along to see how it might handle the RF-dense environment of Field Day.
We made a few contacts with the X6200, but the audio and receiver struggled in that RF-congested environment. This isn’t a surprise, in truth. Most portable field radios aren’t designed to have contest-grade performance—they’re designed for portability and functionality in normal field conditions.
The other radio I brought along was the Penntek TR-45L. I can’t remember if I’ve used it during Field Day in the past, but all Vlado and I could say was…
Wow!
The TR-45L sounded phenomenal!
I’ve always believed that the TR-45L (both the original and skinny version) has some of the best audio in the world of field radio. That is a major plus when it comes to Field Day.
The thing is, it also has a stable front end—the TR-45L receiver handled those packed RF conditions with ease. In fact, we were both amazed at how easily we could hear all of those competing signals. There was absolutely no listening fatigue at all, and both of us could hear weak and strong signals all occupying the same space..
It sounded distinctly analog and “pure.”
Vlado and I both tend to operate with filters wide open—using the filter between our ears—so the audio produced had excellent fidelity.
Vlado and I also made short work of Vesna’s Feta cheese bread!
A couple of times, we did narrow the TR-45L’s audio filter when there was a strong competing station, but by and large, the audio was so clear, we really didn’t need to.
Top-Shelf
The takeaway for me is that the TR-45L series radios have proper contest-grade performance even if they lack contest-grade filtering.
I shouldn’t be surprised because even its predecessor, the TR-35, can handle crowded conditions with ease.
I should add here that the supply of new Penntek radios may already be dried up. As I mentioned in a previous announcement, John (WA3RNC), is retiring and selling off all of his existing radio inventory.
According to his website, he might still have some TR-45L Skinny models, but that’s it. In fact, that notice was dated May 28, 2024, so I’m not sure if it’s still correct.
The TR-45L Skinny
I love the Skinny as much as the original TR-45L—they sport the same receiver and audio; the Skinny simply lacks the ability to add an internal battery and Z-Match ATU. What you get, though, is a radio that’s even more portable and provides an excellent operating angle with the bail folded out.
Have you ever operated a Penntek radio during a contest or Field Day? What are your other favorite field radios for this type of environment? Please comment!
That Thursday morning, we organized a shelf-building party to assemble a shipment of new shelves we’re going to use to house our collection in a new space A-B Tech has given us on the third floor of the Elm building.
We’re super excited about the new space not only because it’s much larger, but there’s even a dedicated workbench where we can invite students and guests to learn some soldering and repair skills.
If you’re ever in the Asheville, North Carolina area, I’d strongly encourage you to check out the Asheville Radio Museum. Check our website for directions and hours.
We ended up working on the shelves for a couple of hours, and once assembled, I decided to grab lunch at Bridge & Tunnel Coffee in the Coman Student Activity Center next door. The food and coffee were absolutely amazing. A-B Tech students are so lucky to have a café of this caliber on campus!
I spent more time hanging with my friends at lunch than I had planned. No regrets there.
I knew there was still plenty of time to make my way to the Vance Historic Birthplace and fit in a POTA activation! Twenty minutes of driving later, and I was pulling into the Vance parking lot.
Zebulon B. Vance Birthplace (US-6856)
As I made my way around the visitor’s center, I was very pleased to see that the picnic shelter was unoccupied. School was still in session for many districts in the area and field trips tend to take place near the end of the term. Had there been a school group at this small historic site, I would have gone elsewhere to activate so as not to disturb them.
The weather was pretty amazing – the perfect day to be outdoors playing radio.
Speaking of radio, I brought a special one with me that day.
The Mission RGO One
As I mention in my activation video below, I receive more questions about this radio than any others I take to the field. Some have seen it in previous activation videos, and many see it in my QRPer.com banner rotation.
Typically, I’ll get a message with the following question, “Thomas, what is that cool radio with the white faceplate I see in the banner on QRPer?”
It’s no wonder I get a lot of questions about it. The Mission RGO One is a very low-production run modular transceiver – the creation of Boris Sapundzhiev (LZ2JR).
Boris produces the Mission RGO One in small batches at his facility in Bulgaria. This is very much a cottage industry radio – one you won’t find in many shacks or on Field Day because there just aren’t a lot out there (compared with Yaesu, Elecraft, Icom, etc.).
I’m a massive fan of the RGO One. So much so, that if I had to pare down my radio collection to only two HF transceivers, the RGO One would be one of those two.
I love the RGO One’s legacy design and the fact it’s a down-conversion superhet receiver with 9MHz IF. The receiver is absolutely amazing.
You don’t see the RGO One in many of my POTA videos mainly because I tend to use my smaller, portable radios in the field. That said, the RGO One was designed with field operating in mind – it’s a very capable radio and lightweight compared to other tabletop radios.
The RGO One is my main HF radio in the shack, so it actually gets heavy use. If I’ve ever hunted you at the QTH while you were activating a park or summit, it was likely with the Mission RGO One.
As I mention in the video, I will plan to make a “Getting To Know You” video with the RGO One in the near future, so I’ll speak a bit more about it then.
I decided to deploy my KM4CFT EFHW kit that I trimmed for 30 meters with a 40-meter extension. This antenna is brilliant because it resonates on 30 and 17 meters as a 30-meter EFHW, then if you link the 40-meter extension, it’ll give you 40, 20, 15, and 10 meters. That’s six bands on one antenna without the need for an ATU.
Next, I paired my Begali Traveler paddles with the RGO One.
Although the RGO One has a maximum output power of 50 or 55 watts, I had it set to my standard 5 watts QRP.
Gear
Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.
Being in the early afternoon, I decided to hop on 20 meters first, as I assumed it might be one of the more productive bands. Conditions – as we all know – have been quite rough as of late, so I tend to start my activation on the band where I think I’ll accumulate the most contacts. Continue reading On a POTA Mission with the RGO One!→
Sometimes, we do things for the pure nostalgia of it all!
I mentioned in a previous post that I recently acquired a circa 1995 Index Labs QRP Plus transceiver. Being transparent here, this was an impulse purchase fueled by pure, unadulterated nostalgia.
The QRP Plus was the first QRP transceiver that I’d ever laid my eyes on only a month or so before obtaining my ham radio ticket in 1997. I’ll write about this in more detail in the future–and I speak to this in my video below–but let’s just say that this little cube of a radio made a big impression on me at the very beginning of my ham radio journey.
I thought it might be fun to take it to the field and compare this 1995 state-of-the-art radio with so many of my other field radios. The QRP Plus wasn’t a perfect radio, but it was a marvel at the time it was produced. I can’t think of a smaller, more battery-efficient general coverage 160-10M QRP transceiver at the time.
I was eager to introduce this little radio to the world of POTA so on the morning of Thursday March 21, 2024, I grabbed it and hit the field!
Zebulon B. Vance Birthplace (US-6856)
I called the Vance site that morning and learned that a large school group would be arriving around noon. Since I was planning to leave around that time anyway, it was perfect timing for me.
Since I hadn’t created a field kit specifically for the QRP Plus yet, I brought my watertight stackable Husky brand box that basically contains everything I need to set up a field radio station, save the radio.
I unpacked everything I needed: a key, key cable, battery, power cord, cable assembly, antenna, logbook and pencil.
Since the QRP Plus has no internal tuner, I paired it with my MM0OPX 40M EFHW antenna which would give me 40, 20, 15, and 10 meters. Note that Index Labs used to make an external manual ATU for this radio called the QRP Companion–I’ve never seen one in person, though.
Even though the Vance staff told me that the school group would not be using the picnic shelter, thus I could have free reign, I still deployed my antenna in a way that it would not become a trip hazard–keeping it close to the shelter and as conspicuous as I could (I do wish I would have brought along my flagging tape, but I left it at home).
Setting up the QRP Plus station was quick and easy. Time to hit the air!
Gear:
Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.
Those of you who purchased a fully-assembled and tested version of the QRP Labs QMX are, no doubt, patient people.
While you can order a kit version of the QMX and receive it fairly quickly (still, I believe), the assembled versions take more time as the QRP Labs crew is small and they build and test these by hand.
I ordered mine on June 5, 2023, and it shipped on December 27, 2023.
Truth is, I’ve had a QMX kit since Hans Summers announced it at Four Days In May (FDIM) prior to the 2023 Hamvention. I’ve been meaning to build it but, as many of you know, my life has been a tad crazy these past months and I never got around to it.
I purchased an assembled version of the QMX because I will be reviewing this one and wanted a factory-tested unit. I would have never guessed I’d receive the assembled unit before building it!
Familiar Form-Factor
The QMX looks so much like my QCX-Minis, I’ve gotten them mixed up in the shack! The menu system is very similar to the QCX, but there are some changes to accommodate band changes, modes, etc., as the QCX-Minin series is mono-band CW only.
The QMX, on the other hand, is a five-band, five-watt, multi-mode (CW, Digital, and likely SSB in the future) transceiver. It’s hard to believe you can purchase the QMX for as little as $90 (bare-bones) kit or $165 (fully-assembled and tested).
I initially thought I had an issue with my QMX because it kept shutting down the transmit function. Turns out, that was all user-error. I mentioned the issue on an episode of the Ham Radio Workbench podcast, and a couple of listeners wrote to tell me what I was doing wrong: I was feeding it too much voltage. The QMX doesn’t want more than 12V or so. If the radio detects even a temporary mismatch, it shuts down the TX to protect the finals, etc.
I was unintentionally triggering the QMX’s self-protection functionality!
Once I figured that out, I decided to simply pair my QMX with my Bioenno 3Ah 9V LiFePO4 battery. That would yield about 3 watts of output power and be a comfortable voltage for the QMX.
Vance Historic Birthplace (US-6856)
On Thursday, March 7, 2024, I finally took the QMX outdoors where it belongs! I had a one-hour window of time to complete a full activation. I decided to pair the QMX with my Chelegance MC-750 vertical.
My QMX is a “low-band” version that covers 80, 60, 40, 30, and 20 meters. I thought the top end of its band coverage would serve me best mid-day, so I planned my activation around 20 meters.
Setup was easy and simple. You can see the full set-up process in my activation video below.
Gear:
Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.
You might recall a recent POTA activation where Jonathan (KM4CFT) joined me at the Vance Birthplace K-6856 US-6856–?
Jonathan used my Penntek TR-45L for his portion of the activation, and I was pleased he got to spend some time with this magnificent CW machine. You might also recall that it still had a buzz in the speaker audio–something inside the radio was vibrating.
KM4CFT working the TR-45L in late December 2023.
I tried to track down the buzz as Jonathan operated by tightening some of the screws holding on the speaker grill (yeah, I’m sure that was annoying, and he’ll think again before activating with me in the same space–!). I knew, though, it was something inside the chassis that was vibrating with audio.
As I also mentioned, my TR-45L was a prototype unit (I helped Beta test it)–it had a couple of mods and wasn’t exactly representative of the upgraded production model.
John (WA3RNC) at Penntek reached out to me after I published my recent field report and video; he offered to upgrade my TR-45L to the production chassis which would sort out the buzz. I was most grateful, of course!
He then asked if I would be interested in checking out the TR-45L “Skinny,” which is essentially a TR-45L in a much skinnier chassis. The Skinny model lacks the ATU and battery options but is lighter weight and more portable. I mentioned to John that I’d like to purchase one, actually. Since John was interested in sponsoring QRPer, we ended up working out a barter (at full market price) for ad space. I love this arrangement, actually, because I was going to approach him about sponsorship at some point anyway.
The Skinny!
Now keep in mind that the TR-45L is one of my favorite CW radios. I love the audio, the receiver characteristics, and the “Apollo era” aesthetic. I think it’s one of the best-looking and best-sounding radios on the market.
The Skinny is just like the bigger TR-45L, just roughly half the depth. I did have concerns that the audio wouldn’t be as good since the acoustic chamber would be smaller, but turns out, I had nothing to fear. The Skinny’s audio is on par with its bulkier sibling.
There was no learning curve with the Skinny because 1.) it’s identical in operation to my TR-45L and 2.) Penntek radios have super simple interfaces, and almost every function has a top-level direct control.
Zebulon Vance Birthplace (US-6856)
On Tuesday, February 27, 2024–the day after receiving the TR-45L Skinny–I packed it up and took it to the Vance Birthplace for its inaugural POTA activation!
That day, I had about 90 minutes to enjoy an activation, and I was looking forward to spending time with the new Skinny.
Vance was a great choice that day because the weather was moody; it was gusty, rainy, and I knew their picnic shelter would provide excellent cover.
The Skinny (in its padded bag), the MC-750 and my ABR cable assembly.
The TR-45L Skinny, unlike my original TR-45L, has no internal Z-Match ATU, nor does it have an internal battery. In fact, there’s no room for either in the Skinny, so it’s not even an option.
I paired the Skinny with my Chelegance MC-750, which is a resonant antenna when deployed correctly, so there was no need for a matching device. I supplied power via one of my 3Ah Bioenno LiFePO4 batteries.
Setup was simple and easy!
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 Thursday, December 28, 2023, I had the good fortune of meeting up with Jonathan (KM4CFT) at the Zebulon Vance Historic Birthplace (K-6856) to play a little POTA.
These days, Jonathan lives in Colorado, but he’s originally from western North Carolina. We met once before when he was in town visiting his folks. That previous time was very short, though; this time, we wanted to meetup and fit in a POTA activation together.
We arranged to meet around 2:00 in the afternoon at the Vance Birthplace.
We decided to deploy one of Jonathan’s End-Fed Half-Wave antennas. He cut this particular one for 20 meters.
We set up under the picnic shelter with the antenna essentially in a sloper configuration.
Gear:
Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate/partnerhip links that support QRPer.com at no cost to you.
I brought along a couple of radios that Jonathan had yet to operate. He chose to use the Penntek TR-45L (great choice!).
One wrinkle: Jonathan operates with his paddle in “reverse” with the left paddle sending dashes and the right sending dits.
Unfortunately, the TR-45L doesn’t have a software function to flip between “normal” and “reverse” settings. No problem, though: Jonathan simply turned his key (a BaMaKey TP-III) upside down! Problem solved!
The only annoying issue was the 45L speaker–something inside the chassis or speaker assembly was rattling/buzzing with louder signals and with the sidetone. After noticing the speaker vibration at an activation in South Carolina a few months ago, I opened up the TR-45L at the QTH and tried to tighten down anything that could resonate inside the chassis. My fix seemed to work until we powered it up for Jonathan to use. I may have to add some padding around the speaker assembly if I can’t locate the culprit inside the radio–it could be pretty much anything.
Jonathan plugged along and paid no attention to the buzz, nor my fiddling with the radio while he operated. (You’re a good sport, OM!).
After he completed his activation, Jonathan handed over the radio to me.
Since I couldn’t sort out the acoustic buzz/vibration without opening the radio on the picnic table, I opted to swap out the TR-45L with my Discovery TX-500.
I hopped on the air and logged quite a few stations on 20 meters. It was serious fun!
Here’s our 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.
Jonathan, it was great hanging with you and, again, I’m so impressed with your CW progress. It seems like only yesterday when you started your CW journey!
When folks are passing through western NC it can be difficult for our schedules to align for a POTA meetup, but I’m so happy when they do.
Thank you!
Thank you for joining us on this joint activation!
I hope you enjoyed the field report and ctivation 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 weekend!
Connecting an international community through low-power field radio adventures.
Please support QRPer by adding us to your whitelist in your ad blocker. Ads are what helps us stay online. All of our ads are ham radio related--no junk, we promise! Thank you!
After two hours of non-stop CW with the Elecraft KX3, I took a brief break, swapped radios, and continued the activation with my Penntek TR-45L.
One nice bonus of using the TR-45L is that mine has a built-in Z-match ATU, which allowed me to easily find a match on 30 meters, even though the Spooltenna EFHW isn’t resonant on that band. The antenna was the same excellent 40-meter EFHW prototype from Rob (KO4HUI) that I featured in Part 1.
As I mentioned in Part 1, this was a longer activation, and since I needed to submit electronic logs to HRWBOTA admin Mark (N6MTS), I skipped paper logging—a true rarity for me.
During this second part of the event, I started on 20 meters and spent a little over an hour working a steady stream of contacts. Continue reading Ham Radio Workbenches On The Air Field Report: Part 2 
