I’m not much into awards and certificates, but I’ll freely admit that this letter absolutely made my day:
This month, we’ll take a deeper dive into the types of radio kit you might choose to assemble based upon your activity goals. And finally, we’ll look at my “golden rules” of field kits, which I hope you’ll find useful.
I configure and outfit my radio kits based on the environment in which I plan to deploy and operate, and which determines in no small way just what I need to pack besides the basics.
I roughly divide my field kit types as follows…
This is probably the most popular type of field kit in the world of amateur radio. Picnic table kits are designed with portability in mind, but not designed with distance hiking in mind. This is a very popular type of kit for Field Day or park activations through POTA or WWFF.
These kits are typically packed in a backpack, a Pelican-type utility case, or a self-contained and field-ready box.
My picnic table kit is packed in a large Red Oxx C-Ruck rucksack. If I haven’t already made it clear, I’m a self-professed pack geek and I love this Red Oxx Pack because it has large zippered pockets on the outside, a rain flap with storage on top, and one large compartment on the inside.
The following review was first published in the June 2021 issue of The Spectrum Monitor magazine:
by Thomas (K4SWL)
Whether it’s the ARRL Field Day, Winter Field Day, a QRP contest, or, more likely, a Summits On The Air or Parks On The Air activation, I look for any and every excuse to hit the field with my radios.
Most of my on-air time is in the field. While I enjoy operating from the shack, I’ve discovered I especially enjoy operating in the great outdoors.
Besides being a fan of hiking, camping, and the great outdoors generally, I also am particularly fond of radio field gear. I like portable transceivers, portable antennas, battery packs, and all of the accessories that make field operation efficient and enjoyable.
I appreciate the emergency communications skills I’ve developed in the field, too. Should the need (or opportunity) arise, I now keep a complete field kit packed and ready to go at all times, and can even deploy all of it within just ten minutes. In my early days of ham radio operation, I might have easily spent thirty minutes setting the antenna, alone…especially on Field Day, with folks watching me struggle to untangle wires and cables, followed by the undoubtedly entertaining attempts I made to put a line into a tree to deploy the antenna. But after deploying a variety of antennas hundreds of times now, I find that––while I’m still not perfect––I finally have a bit of skill and the process of tossing up a line is becoming much swifter and smoother.
If I’m being honest with myself, I admit: I also simply get a thrill out of kitting out my field packs, as well as organizing and tweaking them over time. Yes, (don’t judge me!) I actually like packing up my field gear.
I think my passion for organizing and packing gear goes back to a former career when I lived in the UK, Germany, and France, and was required to travel throughout Europe frequently. Originally inspired by travel guru Rick Steves, I’ve always appreciated the footloose feeling of having all of my travel gear in one lightweight pack. I don’t like checking in luggage, but love the freedom of grabbing my backpack and skipping the baggage claim carousels. And I also like knowing that, even though my gear is compact, it contains everything I need.
I’ve become something of a “less-is-more” traveller. Two years ago, for example, I traveled for one week using what Frontier Airlines classifies as a “personal carry-on.” My Tom Bihn Stowaway pack, which only measures 14.0″ (w) x 9.4″ (h) x 8.1″ (d), carried everything I needed for a conference, including my own presentation gear.
Packing for that trip was great fun as it really challenged me to decide what was essential and what was not. My iPad doubled a computing and presentation device, for example, but I also packed a small flashlight and a mini first aid kit, which I felt were important. Of course, I also carried a small portable Shortwave/AM/FM radio and my Yaesu VX-3R handheld…also vital, as I can’t leave home without radios!
Putting together a field radio kit is so similar to packing for travel: you must first do an assessment of what you need, starting with the basics––then organize it, pack it, and test it.
In my world, this is a very deep topic. We’re going to break down this topic into two parts.
This article, Part 1, we’ll dive in:
In Part 2, we will:
First, let’s go over the basics of your field kit, considering that that these primary components will dictate your bag, pack, or case size.
Since I’m a bit radio obsessed, I have a number of QRP transceivers I like to take to the field. But if you have selected one transceiver you plan to dedicate to field work, or simply have only one transceiver, period, you can build a kit around it (and see my note below about “modular” kits). If budget allows, you might consider buying a radio specifically for field use, so it can always be packed and ready to go.
There are a number of transceivers on the market that are designed with field use in mind. Some are compact, power-stingy CW-only QRP transceivers that might only operate on three ham radio bands, while others are 100-watt general coverage transceivers that even have built-in antenna tuners––there’s a wide range of options.
Look for field-friendly, built-in options like:
And the more such options are already built into your field rig, obviously, the less separate accessories you’ll need to pack and keep track of in the field, which is a good thing.
Some of my favorite field-ready general-coverage transceivers currently in production are:
An important side note for field contests: if you plan to use a field transceiver in an event like the ARRL Field Day and/or another popular radio contest, make sure you choose a transceiver that can handle tightly spaced signals in an RF-dense environment. This is not the time to pull out a lower-end radio with poor receiver specifications. Use Rob Sherwood’s receiver test data table as a guide.
This particular topic, alone, might warrant a three-part series of articles. So, to keep the scope of this article realistic, let’s just say that you should build or buy an antenna that can comfortably handle the wattage you’re pushing into it in all the modes that you operate, considering that some 100-watt SSB-rated antennas might melt or arc if you run 100 watts CW or FT8.
I would suggest you consider having at least one resonant antenna, like an end-fed half-wave (EFHW) that might cover 40 and 20 meters without the need of an antenna tuner to match the antenna impedance to your rig.
Some of my favorite portable antenna systems?
I’m a big fan of Chameleon Antenna for their ease of deployment and benchmark build quality. Their prices range from $145 for the Emcomm III random wire, to $550 for their MPAS 2.0 vertical antenna system. These prices are near the top of the market, but Chameleon antennas are all machined and produced in the US and the quality is second to none. These are antennas you might well pass along to the next generation, meaning, really heirloom-worthy kit!
PackTennas, likewise, are pricey for such a compact product, but they are also beautifully engineered, lightweight, and designed for heavy field use. PackTenna produces an EFHW, 9:1 UNUN random wire, and linked dipole models. They’re some of the most compact field antennas on the market that can still handle as much as 100 watts of power output.
Wolf River Coils verticals are affordable, compact, and resonant––thus an ATU isn’t needed. It will take some time to learn how to adjust the coil during frequency changes, but they work amazingly well. I have the WRC Take It Along (TIA). Their antennas are designed to handle 100 watts SSB, 50 watts CW, or 20 watts digital.
Vibroplex sells a number of compact field portable antennas and is the manufacturer of Par End Fedz offerings. I’m very fond of the EFT Trail-Friendly and the EFT-MTR.
MFJ Enterprises also has a few portable antennas in their catalog, and it’s very difficult to beat the price and performance of their antenna gear. I have their $50 EFHW antenna (the MFJ-1982LP) and love it.
I’ve also had tremendous fun with the uber-compact Elecraft AX1 antenna. Unquestionably, it’s the most compact and quickest-to-deploy antenna I own. It’s designed to pair with the Elecraft KX2 and KX3 using the optional internal antenna tuner.
There are a number of other antenna manufacturers who cater to portable operators. For example––although I’ve not yet had the opportunity of testing their antennas––SOTAbeams is highly regarded among SOTA enthusiasts.
Short on cash? No worries; you can build your own! In fact, until 2016, I had never purchased a field antenna; I built all my own. EFHW antennas and random-wire antennas are no more than a carefully-wound coil, a female antenna connector, an enclosure or mounting plate, and some wire. Some of the most active field operators I know homebrew all of their antennas. It’s easy, affordable, and fun!
In fact, some antennas are no more than a bit of speaker wire matched with a good ATU.
I’ll keep this point brief because we recently covered the topic of batteries in detail in our previous feature.
Make sure you choose a battery that is sized appropriately for your transceiver power output. I will say that I’m a huge fan of LiFePo4 rechargeable batteries for their voltage range, lightweight design, and longevity. Being primarily a QRPer, I typically use 3 to 4.5 amp hour batteries as they’ll carry me through as many as three or four activations without needing to be recharged. For longer field deployments, or when I’m powering my 100W KXPA100 amplifier, I’ll use my 15 aH Bioenno LiFePo4 pack.
Again, check out our Portable Power Primer for a deep-dive into the world of portable power.
Keys are fairly universal, but keep in mind legacy transceivers often want a ¼” plug while newer rigs typically accept an ⅛” plug. Microphones, however, vary in port type and pin configuration based on the manufacturer and model. You could damage your mic or rig if you plug in a multi-pin mic that was designed for a different transceiver. Most mics that use a ⅛” plug are universal. Still, check before you plug it in if using an after-market or non-OEM mic.
Of course, choose a key, microphone, or boom headset that’s compact and rugged so that’ll be easy to pack and will stand the test of time.
I also always pack a set of inexpensive in-ear earphones. These can dramatically help with weak-signal interpretation.
Also, if you plan to operate a digital mode, you’ll likely need some sort of computing device. Even though I rarely operate digital modes in the field, I often pack my Microsoft Surface Go tablet in case I change my mind.
In addition, I like logging directly to N3FJP’s Amateur Contact Log application directly in the field to save time submitting my logs later. Soon, I’ll be using the new HAMRS field log on my iPhone.
Speaking of logging…
As simple as it is, it’s very important to take at least some paper and a pencil for logging your contacts. I like using small, pocket-sized Muji notebooks (affiliate link) for logging, and if the weather is even a little questionable, I’m a huge fan of getting my contacts down in Rite In The Rain mini notebooks (affiliate link) or notepads using a good old-fashioned pencil.
I like logging to paper and sometimes simultaneously logging to my Microsoft Surface Go. I have completed phone-only field activations where I only logged to my Surface Go tablet: in those cases, I snap a photo of my N3FJP call log, just in case something happens to my tablet between the field and the shack! Having endured enough technology failures, it gives me peace of mind to have at least one other backup.
Keep in mind that when you’re activating a park or summit, the folks calling you are relying on you to submit your logs to the appropriate programs so that they can get credit for working you. Many times, this might also help their awards for a state, county, or grid square. Always submit your logs after an activation even if you didn’t make enough contacts to validate the activation (POTA requires 10 contacts, SOTA requires 4 logged). It helps other folks out.
If you have a field radio kit, you’re going to need a means to organize and contain it for transport. There are at least three types of systems used for field kits.
A backpack or soft-sided case
Since I enjoy the option of hiking with my radio gear, I love using backpacks. Although I’ll speak to this more next month in “Part 2,”, I choose quality packs that have at least one waterproof compartment and are comfortable to carry on long hikes. I also try to look for packs with Molle or some sort of external strapping so that I can attach portable antenna masts or even my hiking poles to the exterior of the pack.
A waterproof case or flight case
Many field operators who want extra protection for their gear––especially when they don’t plan to hike or carry their gear long distances to the operating site––like hard-sided cases. I have built field radio kits in waterproof Pelican cases and appreciate knowing that I could drop my kit in a whitewater river, and it would likely survive the adventure unscathed. If you are one of these operators, look for quality watertight cases from brands like Pelican and Nanuk with interiors lined in pick foam padding that allows you to perfectly accommodate and safely protect your radio and accessories.
Portable ready-to-deploy cases
Although this option is almost outside the scope of this article, many emergency communications enthusiasts love having their gear loaded in rugged, portable––often rack-mounted and hard-sided––cases that they can simply open, hook to an antenna, and get right on the air. These systems are often the heaviest, least “portable,” and less suited for long distance hikes, but they’re often completely self-contained, with all of the components, including the power, hooked up and ready to go on a moment’s notice. While a system like this would be impractical for many Summits On The Air sites, it could be ideal for a park or island activation where you’re never that far from your vehicle.
This doesn’t sound like an option, but it’s true. I’ve often operated my Elecraft KX3, KX2, and KX1 without a feedline at all: I simply attached two wires to a BNC binding post, and connected that to the radio. It makes for a super-compact setup.
Even an 8-12 foot feedline can make it easier to configure your operating position in the field. If you want to keep the feedline as low-profile as possible, especially if you’re operating QRP, consider investing in a quality RG-316 feedline terminated with the connector that fits your radio and antenna.
Again, this topic could easily warrant a multi-part series of articles, but I’ll sum this one up in a nutshell: while I love (and even prefer) using resonant antennas that require no antenna tuner, I almost always carry a radio with a built-in ATU or an external portable ATU like the Elecraft T1 or ZM-2.
Why? Because an ATU will give you a certain amount of frequency agility or freedom. If I’m using an antenna that’s resonant on 40, 20, and 10 meters, but there’s a contest that day and the bands are incredibly crowded, I might use the ATU to find a match on 30 meters or 17 meters, thus finding a little refuge and space to operate. Also, sometimes antenna deployments aren’t ideal––due, for example, to site limitations such as dense vegetation that may alter the antenna deployment and thus its resonance. An ATU can at least keep your transceiver happy with the SWR when your resonant antenna might not be perfectly resonant.
But the main reason I carry it? A portable ATU gives you operational flexibility.
Its good to keep in mind that many of the station accessories listed above need to be matched to the output power of your transceiver and modes you use.
Many ham radio friendships have been placed in jeopardy over the question of either using QRP (low power) or QRO (high power) for field operations. This is a shame. Some operators have very strong opinions, but the truth is, there is no right or wrong answer.
In the spirit of full disclosure, I operate 97% of the time at QRP power levels––in my world, this means five watts or less. Personally, I enjoy the challenge of low-power operating. But I also appreciate the portability QRP gear offers.
Speaking pragmatically––and this fact really isn’t open to debate––QRP and lower-power transceivers and accessories tend to be more efficient, more compact, and lighter than their higher-power siblings.
Most of my QRP transceivers weigh anywhere from two to five times less than their 100-watt equivalents. If you’re operating mobile (from a vehicle or camper/caravan, for example), an eight to twelve pound difference might not be a big deal. But the moment you’re hiking several miles to a mountain summit, weight becomes an important factor.
QRP transceivers have modest power requirements: everything from battery, to antenna, and even to tuners, are smaller, lighter, and more compact.
When operating QRP, you don’t have to worry as much about RF coming back to the radio from, say, an end-fed antenna. If I’m pushing over 20 watts into an end-fed half wave or end-fed random wire, I’ll likely want an in-line RF choke to keep some of that energy from affecting my transceiver or giving me an RF “tingle” when I touch the radio chassis or my key. Too much RF coming back to the transceiver can also affect things like electronic CW keying. But at five watts? I don’t worry. This is almost a non-issue, unless your transceiver happens to be very RF-sensitive indeed.
And even though I’m predominantly a QRPer, I definitely do pack radios like the 50-watt Mission RGO One and occasionally my Elecraft KX3 and KXPA100 100-watt amplifier, especially for an event like Field Day where my club is operating at higher power. I simply size up my gear appropriately. Again, this is especially important with your antenna, feed line, ATU, and battery selections.
If you primarily activate parks and are never far from your vehicle, it’s quite easy to accommodate a 100 watt transceiver like an FT-891, for example. Of course, if you wish to operate low-power and save your battery, simply turn down the output power. If you plan to hike a lot with your gear, then get your mind around QRP!
In Part 2 we’ll dig into some of the details, looking at different approaches to field radio kits and some guidance and suggestions based on my real-life experience (read: operating mistakes).
Your support makes articles like this one possible. Thank you!
[QRPers: Please note that the following is a re-post from my shortwave radio blog, the SWLing Post.]
Regular SWLing Post readers know that I’m a ham radio operator (call sign K4SWL). Being a shortwave radio enthusiast, of course, I spend most of my time on the air in the HF portion of the amateur radio spectrum. Contacting distant stations and connecting with other ham radio operators around our little planet gives me immense joy.
Thing is, my life has been so hectic lately, I’ve barely been home during the Heard Island DXpedition (March 29th – April 11th). And the days I have been home, VK0EK’s signals have been incredibly weak.
In short: timing and propagation were all working against me. And VK0EK was soon to pack up and come back home. I was becoming desperate…and beginning to lose hope that I’d make any contact with this unique and rare entity in the isolated stretch of ocean between Madagascar and Antartica.
My hope was waning. Then, Tusday evening, I gave a presentation about shortwave radio at the Blue Ridge Amateur Radio Club. On the hour-long drive home, I stopped by my good friend Vlado’s (N3CZ) to confess my troubles to the radio doc.
Now it just happens that Vlado has a much better antenna set-up to work DX than I do, and what’s more, (close your ears, fellow QRPers) he has an amplifier.
Most importantly, though, Vlado is a keen DXer. He’s got 330 countries under his belt, and ever up for a challenge, routinely pushes himself to accomplish more with less. In January, with members of the local club, he entered a QRP challenge; he had 100 countries worked by the following month, all in his spare time. And a few years ago, Vlado actually built a radio of his own design and worked 100 countries within two months (you can read about that here).
So, of course, he was game to help me make a contact…even if it was a long shot. A very long shot.
Juan de Nova
When I arrived at Vlado’s QTH around 21:00 local, VK0EK was impossibly weak, so we focused our efforts on 30 meters and FT4JA: the Juan de Nova Island DXpedition (another all-time new one for me).
After more than an hour of calling, FT4JA finally heard my call and (woo hoo!) I was confirmed in their log.
But what about Heard Island?
After working FT4JA, we moved down to 40 meters where VK0EK was slightly louder than before. Well, maybe it’s not impossible, I thought hopefully. Just next to it.
Between QSB (fading) and tuner-uppers, my ears were bleeding trying to hear Heard’s minuscule CW signal–so faint, so distant were they.
After only about ten minutes of steady calling, Vlado made a sign to get my attention, and we strained to listen, very carefully.
VK0EK came back very faintly with just one letter incorrect in my call–it was enough that I didn’t catch it at first. But Vlado heard it, and after sending the call back a couple of times, then the report, VK0EK confirmed my call with a signal report, and I reciprocated.
Vlad and I leapt to our feet, yelling, “WOO HOO!” (and hopefully didn’t wake up any of Vlad’s neighbors).
Heard Island is actually running an online log that is updated live. We immediately looked there to confirm I was in their log, and was greeted with this great circle map and a line from Heard Island to my call sign in the States. Vlado made this screen capture as a momento:
Here’s to good friends and mentors
In one incredible evening, I snagged two all-time new ones–and I owe it all to my good buddy, Vlado. Most importantly, I’ve been learning so much from him as he patiently coaches me through some weak DX with serious pileups. Plus it’s just always fun hanging around Vlado, the best broken radio doctor I know, to whom “challenge” is…well, a piece of cake.
Thanks Vlado, for your enthusiasm and patience–I’m lucky to have a friend like you!
I’ve been invited to speak at the Pisgah Astronomical Research Institute (PARI), a non-profit educational radio astronomy observatory (and former NASA tracking station as well as one-time NSA installation), in the mountains of western North Carolina.
I’ll be speaking about shortwave radio, of course–both its technical and cultural aspects–on October 10, 2014, at 7:00 pm EDT. Afterwards, there will be a tour of the PARI campus, and an opportunity to stargaze with both amateur and professional astronomers.
Many thanks to my buddy, Ken Reitz, who shared this article about my presentation in the area’s local county newspaper; here’s my statement about the presentation:
“Shortwave radio is an international communications medium that has been in existence for nearly one hundred years,” said Witherspoon, “yet this vintage technology supports an ever-evolving multicultural landscape that, remarkably, remains relevant today. The Internet and mobile technologies have made the dissemination of information more readily accessible to many, yet shortwave radio remains viable and dynamic, and in many ways still outstrips the Internet.
“I plan to share some of shortwave radio’s diverse voices and investigate some of the technology used to receive them. So, if you are a shortwave enthusiast, or simply interested in learning more about shortwave, this program is for you and will be suitable for all ages.”
Read the full article here–and if you can make the journey, join us for shortwave and astrological fun. There is a small charge for the evening; all proceeds go towards PARI’s mission of providing public education in astronomy.
PARI is a stunning radio astronomy campus which will no doubt be accentuated by the mountains’ fall leaf colors on October 10. For PARI’s location, click here.