Zero Retries 0201
2025-05-09 — Amateur Radio Isn’t Having All The (Radio) Fun, New Types of New Amateur Radio Operators… and Their Expectations, Langstone (V2) VHF / UHF Software Defined Radio Project, and more!
Zero Retries is an independent newsletter promoting technological innovation in and adjacent to Amateur Radio, and Amateur Radio as (literally) a license to experiment with and learn about radio technology. Radios are computers - with antennas! Now in its fourth year of publication, with 2700+ subscribers.
About Zero Retries
Steve Stroh N8GNJ, Editor
Email - steve@zeroretries.net
On the web: https://www.zeroretries.org/p/zero-retries-0201
In this issue:
New Types of New Amateur Radio Operators… and Their Expectations
Comments for This Issue (redirect to Comments page)
Request To Send
Commentary by Editor Steve Stroh N8GNJ
Paid Subscribers Update
My thanks to Craig Dale W9PAX for becoming an Annual Paid Subscriber to Zero Retries this past week!
Financial support from Zero Retries readers is a significant vote of support for the continued publication of Zero Retries.
# # #
Zero Retries Digital Conference 2025 Update 2025-05-09
ZRDC Conference Manager Tina Stroh KD7WSF chided me (“Honey, you forgot to mention…”). In my previous ZRDC update, I neglected to mention that we now have an Individual Amateur Radio Operator Sponsorship Letter available on the ZRDC page:
Tina has also developed a Corporate Sponsorship Letter:
For those that are interested in individually helping to sponsor ZRDC 2025, Tina and I would be grateful for financial help. We are in the process of composing similar letters for local Amateur Radio clubs and relevant companies and organizations.
The latest information on Zero Retries Digital Conference is at https://www.zeroretries.org/p/conference
or click the Conference link at that the top of the Zero Retries page.
# # #
Hamvention 2025!
Preparation and packing are approaching fever pitch for my trek via planes and automobiles to Hamvention 2025 next weekend. My wonderful wife Tina has graced me with sane airline reservations of a direct flight from Seattle, Washington to Columbus, Ohio with reasonable car trips on both ends. Our airline of choice is Alaska Airlines, which in my experience is the last sane US airline and I have yet to have a bad Alaska flight (though obviously, Alaska has had its issues).
Which radio to bring is simplified down to bringing my venerable, reliable, easy to use Kenwood TH-F6A portable (analog FM only)… and nothing else. I don’t have plans to be in communication with anyone via radio (absurd, I know, given the venue). Though given the use of Meshtastic at Hamvention (see ZR > BEACON article in this issue), a handheld (Blackberry style) Meshtastic unit might have been fun given the concentration of Meshtastic users at Hamvention. When I eventually purchase a CS7000-M17, I’ll certainly include that for big Amateur Radio events. With M17 being a primary topic at Zero Retries Digital Conference in September, I’ll certainly have made that purchase this summer.
My tentative schedule for Hamvention follows. All seminars listed are interesting, but I may well not be able to attend all of them.
Thursday 2025-05-15
Attend Hamvention most of the day to meet and potentially interview Zero Retries Interesting vendors prior to general admission.
After Hamvention closing, see the VOA Museum (extended hours through 21:00).
Available in the evening for meetups in the Dayton area.
Get my last good sleep for two days.
Friday 2025-05-16
Attend Hamvention all day.
Seminars:
09:15 - 10:15 - TAPR - Topics in Digital Radio - Forum Room 4
12:50 - 14:00 - Strategy, Grantmaking, and 44Net: ARDC’s Roadmap for the Future - Forum Room 3
15:10 - 16:00 - APRS - State of the Union - Forum Room 3
Most other times I will be at the MMDVM booth 2805, in the Tesla building discussing and demonstrating IP400.
18:30 - 21:00 - TAPR / AMSAT Banquet at Kohler Presidential Banquet Center. Mostly I’m attending to hear Phil Karn KA9Q talk about ka9q-radio.
Saturday 2025-05-17
Attend Hamvention all day.
Seminars:
09:15 - 10:10 - HF Digital Modes - Forum Room 4
12:40 - 13:40 - ARISS: Celebrating 25 Years of Continuous Operations on ISS… - Forum Room 2
13:35 - 15:10 - AMSAT - Forum Room 2
Available for dinner meetups for fun Zero Retries Interesting discussions.
Sunday 2025-05-18
Attend Hamvention all day (ends at 13:00).
09:15 - 10:20 - Seminar - ARRL FCC Update - Forum Room 2
Depart Hamvention mid-afternoon.
Of course, the most memorable parts of attending any conference are the unexpected meetings.
# # #
Nice IP400 Mention in Amateur Radio Weekly
Zero Retries 0200’s article - IP400 Ichiban - The Big Reveal got a nice mention in Amateur Radio Weekly Issue 380:
An initial production run of 25 IP400 Ichiban units, paired with Raspberry Pi Zero 2 Ws, with the latest software on a MicroSD card, are in production.
My thanks to ARW Editor Cale Mooth K4HCK for his ongoing editorial support of Zero Retries and the IP400 Network Project. With over 8,000+ email readers, such mentions in Amateur Radio Weekly greatly improve the exposure of Zero Retries and the IP400 Network Project.
# # #
Another Zero Retries Interesting and “M17 Interesting” Issue of Random Wire Review Newsletter
Editor Tom Salzer KJ7T has filled Issue 130 full-to-bursting of Zero Retries Interesting information on M17, including this wonderful news:
Standing up a new M17 reflector
I have set up a new M17 reflector for M17 users in the Pacific Northwest, USA. (With M17, users/clients generally connect through a reflector.) Reflector M17-PNW is built on a Vultr.com server in Seattle. DVREF has summary details at https://dvref.com/mrefd/m17-pnw.
KJ7T offered me a preview of this issue (he’s more organized than I am, especially this week) and I innocently asked if Droidstar required an Android phone or tablet. He replied with the section:
KJ7T is good!
# # #
Have a great weekend, all of you co-conspirators in Zero Retries Interesting Amateur Radio activities!
I hope to see some of you Zero Retries readers at Hamvention 2025! Travel safe!
Steve N8GNJ
Amateur Radio Isn’t Having All The (Radio) Fun
By Steve Stroh N8GNJ
Zero Retries Readers - This subject is new… ish to me, and I don’t know where to look for relevant information. For example, I’ve heard references to other bands where a license isn’t required (for certain power levels), but I’ve never recorded such information.
I think this subject is useful information for “radio clubs” or “wireless clubs” such as those at High Schools, STE(A)M programs, Makerspaces, etc. that aren’t necessarily involved with Amateur Radio.
There are many, many other ways to have “radio fun” without requiring an Amateur Radio or GMRS license. Please let me know about those also.
So I’d like to eventually publish an update to this article after receiving more input. Please use the comments link at the end of the story to provide additional input on this topic.
In Zero Retries 0200, I made a subtle change in the “prelude” statement that I put in each issue of Zero Retries. Previously:
Zero Retries is an independent newsletter promoting technological innovation that is occurring in Amateur Radio, and Amateur Radio as (literally) a license to experiment with and learn about radio technology.
Now:
Zero Retries is an independent newsletter promoting technological innovation in and adjacent to Amateur Radio, and Amateur Radio as (literally) a license to experiment with and learn about radio technology.
“… in and adjacent to…”.
In my (entirely self defined) mission for Zero Retries - trying to document, share, and encourage experimentation and self-education in radio technology by non-professionals, there is a lot of interesting and meaningful activity adjacent to Amateur Radio…
but isn’t Amateur Radio.
Such activity is significant. “Just get your Ham license” is too simplistic a perspective to say . There are reasons that’s not a realistic, or reasonable approach. Some examples:
You need a low barrier to entry. Example: getting younger kids excited about radio technology at a week long summer camp.
Use of encryption.
It’s too much hassle to try to get a group licensed as Amateur Radio Operators. Example: A STE(A)M club or Makerspace members to participate in a radio-related activity.
You live in a rural area where the Amateur Radio club is… I’ll just say “not receptive” to new Amateur Radio Operators, especially kids. This is a true story that was told to me.
Some minor commercial entanglement that might get “flagged” as “pecuniary interest”. Example: Radio experimentation being sponsored by the local electronics store which sells the hardware being used.
Recently this is most notable in the use of LoRa and Meshtastic in the US 902-928 MHz band to build decentralized, off-grid mesh networks for peer-to-peer messaging.
Why does this matter? Because Amateur Radio isn’t growing (as much as it could) from the addition of a lot of curious young (and not so young) techies. They develop some curiosity about radio technology, and they start looking around for interesting stuff they can experiment with. As an example, Hackaday regularly presents radio technology projects, hacks, and general informational articles. Fortunately, Hackaday does feature stories about Amateur Radio… but it discusses Amateur Radio as one option, of many, for experimentation with radio technology.
Thus I think that Amateur Radio is somewhat in denial that they’re in the “prime position” to attract the radio experimenters… unless Amateur Radio really knows what “the competition” is. That competition is interesting activities relating to personal experimentation with radio technology that aren’t occurring in Amateur Radio or don’t require an Amateur Radio license. What follows is not a complete list, and the links provided aren’t meant (or verified) to be authoritative (or up to date)… just to illustrate the suggestion.
Note to non-US readers - in the US, it’s (almost entirely) legal to receive any signal in the electromagnetic spectrum. The best statement I’ve ever heard about this was from the late Bob “Coop” Cooper, one of the pioneers of receiving satellite television (that wasn’t intended for use by individuals). Coop said something to the effect is “whatever I do with signals that fall into my own backyard is my business”.
In the US, it’s a legal gray area to (attempt to) decrypt transmissions that are encrypted… though that doesn’t stop a lot of people from attempting to do so.
It’s also a legal gray area to divulge / publish what you’ve received, especially for some government transmissions. The existence of Broadcastify and other such “receiver sharing” services would argue that “divulgence” isn’t a real issue.
Other national governments have different regulations about what is legal to receive, etc.
But the goal of everything listed below is to have fun with, and learn about radio technology.
Receive Only - Space:
SatNOGS is a distributed network of ground station receivers for downloading data from experimental research satellites (typically built by a university) in low earth orbit.
TinyGS is a distributed network of receivers similar to SatNOGS but for use with satellites that are transmitting LoRa modulation on unlicensed spectrum.
Receive Amateur Radio data and voice transmissions from the International Space Station - Amateur Radio on the International Space Station - ARISS.
Receive weather images from US government weather monitoring satellites.
Receive Othernet free data transmissions.
Receive free satellite television broadcasts. There are some satellite television channels that are not encrypted.
Receive “interesting” transmissions (video) from the US military’s FLTSATCOM / UFO satellites. With a tuned, directional antenna, signals can sometimes be heard with a reasonably priced software defined receiver because these satellites operate in the UHF rather than microwave bands.
“Precision time enthusiasts” maintain their own high precision timebases, usually with inputs from Global Navigation Satellite Systems (GNSS) such as the US Global Positioning System (GPS).
Try to receive Amateur Radio Earth Moon Earth transmissions. I did a thought experiment for this idea in a series articles I called Neil’s Night (Zero Retries 0097 - Part 1, Zero Retries 0098 - Part 2, and Zero Retries 0099 - Part 3) to attempt this each July 20th evening, the anniversary of humanity setting foot on Earth’s moon, Luna.
Receive Only - Terrestrial:
Short Wave Listening (HF bands). This is still an absorbing hobby for many.
Listen to HF via online Software Defined Receivers including WebSDR and KiwiSDR, or put your own Software Defined Receiver online.
Receive WSPR signals and optionally gate data into WSPRNet and similar systems.
Receive marine weather charts (Weather Fax) HF transmissions.
Scanning (VHF / UHF bands) and optionally gating those signals into Broadcastify and other such aggregators.
Experiment with ka9q-radio, which is a novel “receive an entire band simultaneously” technology (not tuning or scanning). ka9q-radio can be used to receive multiple HF bands, or entire VHF / UHF bands, including all Amateur Radio repeaters in the 10m, 6m, 2m, 1.25m, 70cm, and 23cm bands.
Receiving APRS transmissions and optionally gating those into the APRS-IS infrastructure, including aprs.fi. Monitoring very small research balloons is a particularly interesting use case of receiving APRS transmissions.
Receiving AIS (marine) and ADS-B (aviation) location beacon transmissions and optionally gating those into network monitoring
Receive NOAA Weather Radio All Hazards radio. These are transmitter stations that broadcast continuously about weather conditions and have special provisions for alerting during emergency events.
Receiving digital video (PDF) from an Amateur Radio Digital Television repeater.
Receiving Amateur Multicast Protocol (flamp) file transmissions. These can be all manner of files - images, bulletins, documents, etc. and can be received by anyone with an appropriate (simple) receiver and the flamp software.
General radio receiving experimentation using inexpensive “RTL-SDR dongles” and other Software Defined Receive units.
Participation in Ham Radio Science Citizen Investigation (HamSCI) which despite “Ham” in the name, is not limited only to Amateur Radio Operators. There are many projects such as radio receivers and magnetometers where individuals with no Amateur Radio license can contribute to HamSCI’s mission.
Radio Direction Finding (RDF), better known as “bunny hunting” or fox hunting”. This can either be done as a radiosport (very low power transmitter deliberately placed as an RDF exercise) or locating sources of malicious or accidental interference. The concepts are the same from hobbyist, through commercial, and become deadly serious in military conflicts. My favorite RDF device is the KrakenSDR.
It actually seems novel now, but receiving Over The Air (OTA) television broadcast signals can be interesting. Each television transmission can include as many as six individual video streams, and it’s sometimes interesting to see what is included.
Transmitting:
Microbroadcasting using the AM and FM (voice) broadcast bands. You can experiment (carefully…) with transmitting very low power FM with a Raspberry Pi using PiFM or Pi-FM-RDS.
Transmit and receive:
Use of unlicensed bands such as 902-928 MHz, 2.4 GHz, 5.x / 6.x GHz.
Use of unlicensed radio services such as Multiple Use Radio Service (MURS), Citizens Band (CB), Family Radio Service (FRS), Unlicensed Personal Communication Service (PCS). Note that Ribbit / Rattlegram implements data over any Push to Talk two way radio system with no physical connection to a radio device, and this model presages all kinds of experimentation possibilities.
Use of “Licensed lite” radio services such as General Mobile Radio Service (GMRS).
Open source development of OpenWRT replacement firmware for Wi-Fi Access Point units.
Bluetooth is not limited to short range usage.
Use of LoRa and 802.11ah / Wi-Fi HaLow in unlicensed spectrum.
Use of Automatic Packet Reporting System (APRS) (typically using LoRa) in unlicensed spectrum,
Construction of wide area microwave networks using unlicensed 2.4, 5.x, and 6.x GHz. Such networks are not limited to use by commercial users including Wireless Internet Service Providers (WISPs).
Experimentation with Software Defined Receiver / Transmitter units such as ADALM-PLUTO operating at very low power levels into inefficient antennas or dummy loads for “communications across a lab bench”
General experimentation with radio technology:
Build a radio receiver kit (assemble components, practice soldering). One example on Amazon.
GNU Radio open source software development toolkit. GNU Radio Companion is a visual model (kind of a Graphical User Interface) for GNU Radio.
Reticulum is a unique entity, essentially an “anything to anything” network router, capable of connecting to nearly any radio system or any wired network.
If you want to link geographically separated networks (example - mesh networks using 802.11ah / Wi-Fi HaLow) that aren’t in radio range of each other, you can experiment with connecting them via Internet. While there are no options for blocks of the older IPv4 addresses for free, experimental use1 (that I was able to find2), but free experimental use can be done with the newer IPv6 protocol. For example, Hurricane Electric's Tunnel Broker is a popular and free option that provides a /48 IPv6 block.
Participation with a public safety entity, such as working with a Sheriff or Police department as an “auxiliary communicator” using their radios under their license. Not exactly experimentation, but at least familiarization with radio communications without requiring an Amateur Radio license.
Involvement with recreational boating, thus you can use some Marine VHF frequencies and equipment for casual use (boat to boat, or boat to shore).
Experimentation with commercial radio technology systems such as Push To Talk apps over IP / mobile carrier such Zello, and experimentation with Starlink, especially Starlink Mini. Note that Starlink units receive a reasonable number of (apparently, from brief research) static IPv6 addresses.
If you have something really novel in mind, and have a plan for development or testing of a novel system, an FCC Special Temporary Authority (STA) or Part 5 Experimental License is a possibility.
Get involved in your local Community Radio Station. A community radio station typically broadcasts in the FM band at low power, designed to serve the local community. Such stations are typically operated as a not-for-profit entity and usually staffed and managed by volunteers.
IP900
Lastly, while the IP400 Network Project is currently focused on Amateur Radio use in the Amateur Radio 420-450 MHz band, one element of the long term development plan is to consider developing a variant of IP400 using the same concept, protocols, etc. with different radio hardware, and power levels compatible with Part 15 (unlicensed) regulations for use in the 902-928 MHz band - IP900?
…
In conclusion, the point of listing all of the above options for experimenting with radio technology, and especially having fun experimenting with radio technology, that doesn't require an Amateur Radio license is to be easy (well, easier) ways to experiment with and learn about radio technology.
If you’re content to experiment with the above… such as many do with Citizens Band, experimenting with data communications in the 902-928 MHz band, or building and operating not-for-profit microwave networks, great! You’re learning about radio technology and having fun with radio technology!
Pro tip… once you start doing substantive3 experimentation with radio technology, talk about it on your LinkedIn page. Radio technology experience is a comparatively rare skill and you never know when a company needs more radio technology expertise.
I’ll break my usual policy of not mentioning publications behind a paywall for mention in Zero Retries because this topic wouldn’t be complete without a mention of a (electronic) magazine - The Spectrum Monitor (TSM). TSM’s subscription and back issue fee are reasonable, and each issue is distributed as PDF rather than onerous Digital Rights Management (DRM).
If you want to take the next step in experimenting with radio technology - getting your Amateur Radio license, you’ll then be able to transmit on many other radio bands, from Very Low Frequency (VLF) to Microwave (and beyond) at power levels up to 1,000 watts (yes, really)…
Amateur Radio is (literally) a license to experiment with and learn about radio technology.
New Types of New Amateur Radio Operators… and Their Expectations
By Steve Stroh N8GNJ
This article has been in the draft queue for some time and it seems appropriate to complete it as a companion to the previous article.
On the eve of Hamvention 2025, the largest (?) Amateur Radio conference in the world, I think it’s an opportune moment to recognize that Amateur Radio, like all other organized activities, needs to constantly renew itself with new entrants. My perception from my research for Zero Retries is that this trend - more technical entrants, is not widely recognized, or perhaps is only just now beginning to be recognized. And, perhaps more importantly, what these new Amateur Radio Operators are expecting from, and contributing to Amateur Radio.
I’ve been noting for some time in Zero Retries that there is a new type of new Amateur Radio Operator coming into Amateur Radio that is generally more technical than “casually interested” or “focused on emergency communications” potential Amateur Radio Operators.
Backgrounds of these new, more technical entrants into Amateur Radio include software developers, involvement in the IT industry (and especially networking / Internet), involvement in the radio technology industry (including those working for mobile carriers), involvement in the space industry, scientists, open source advocates, technical and university engineering students (and teachers / professors), makers, and hackers. Three examples of what I’ll call “NewTechHams” with prominent public profiles include:
Limor “Lady Ada” Fried AC2SN, Founder of Adafruit Industries
Dale Dougherty KN6WKW, cofounder of O’Reilly Media and publisher of Make Magazine
Jeff Geerling KF0MYB popular YouTube creator, open source advocate, and advocate of Raspberry Pi computers (and its ecosystem)
I first wrote substantively about this trend in Zero Retries 0162 in New Meme - Hackers Are The Future of Ham Radio. The primary example of this trend is that Amateur Radio is a regular feature of the DEFCON conference, including Amateur Radio examinations. From the article:
It's instructive that the largest Volunteer Examiner (VE) Amateur Radio license testing session was at DEFCON 22 in August 2014 (see pages 8 and 9). 205 hackers took their Amateur Radio test at DEFCON 22; the number that passed wasn't noted in the article.
Once I became aware of this trend, I began to see it in many other places. I talked to one newly licensed Amateur Radio Operator who said that they were an IT professional that deployed and managed Wi-Fi infrastructure for a major company. When they heard about AREDN networks, they obtained their Amateur Radio license so they could help deploy and manage AREDN networks.
Thus here are some general observations about NewTechHams.
Transactional
NewTechHams approach Amateur Radio as a transactional activity rather than a hobby (pastime) activity. They have specific expectations of what they want to do, what they want from Amateur Radio. Example: Many want to get hands-on experience with more advanced radio technology than using only unlicensed radio devices such as Bluetooth, Wi-Fi, and LoRa.
Thus… if Amateur Radio wants to retain (and grow) NewTechHams in Amateur Radio, there has to be widespread support for the kinds of technologies and activities that relevant to NewTechHams. Examples: Zero Retries and Random Wire newsletters, Tech Minds YouTube channel, Zero Retries Digital Conference, M17 Project, AREDN, IP400 Network Project, and supporting organizations.
Software and Open Source is Primary
With the rise, and now dominance of Linux in the Information Technology and Internet industries, software has become the primary technology to create new systems. Adequately powerful processors that enable the use of high level programming languages is now assumed. There’s a lot less use of “write to the metal” programming, even when using microcontrollers because it’s simply more productive to do so.
This trend is no different in Amateur Radio. For example, the new < $200 zBitx HF radio uses a Raspberry Pi Zero 2 W computer for most of its functionality, running Linux. The zBitx is (claimed to be) open source, thus experimentation by the end user is possible, and an active group of experimenters is doing so.
Linux has now been in use for more than three decades. Thus NewTechHams have grown up with Linux and open source, and many NewTechHams really, actively despise proprietary systems in Amateur Radio such as the use of the proprietary DVSI codec technology used in DMR, D-Star, System Fusion, and P25. When considering involvement in a project, their first and highest priority question is “where’s the GitHub repository”?
Conversely, a number of NewTechHams have embraced the M17 Project because it’s completely open source. On the m17-users list, I was told that prior to becoming aware that M17 was open source, a number of technically proficient Amateur Radio Operators completely ignored digital voice technology because it required the use of proprietary technology.
Thus… if Amateur Radio wants to retain (and grow) NewTechHams in Amateur Radio, there has to be support for participation in Amateur Radio projects and systems and activities via software and the open source model of community software development.
Internet Native; Internet is Just Another Utility
Similarly to Linux, NewTechHams have grown up with ubiquitous Internet access. NewTechHams under 30 have never known a world without Internet Access. We’ve had mobile broadband Internet access for nearly two decades now.
Thus NewTechHams tend to treat Internet as just another utility. Why wouldn’t their Amateur Radio activities not incorporate Internet when doing so adds to the interest and utility and learning about radio technology and Amateur Radio. For example, the Random Wire newsletter does a stellar job of covering the various (and varied!) aspects of Amateur Radio over Internet. Another example is the rapidly rising popularity of remotely accessible HF radio systems, especially when offered as a membership amenity of Amateur Radio clubs. Such an option is very attractive for exploring HF by those that can’t afford or build their own HF station (students, those in apartments, etc.)
One interesting aspect of NewTechHams expecting always-available Broadband Internet Access (both “landline” and mobile) is that they are acutely sensitive to Internet failure. Thus they seek Internet backup options such as Starlink and alternatives to Internet access, such as Meshtastic, General Mobile Radio Service (GMRS), and Ribbit for critical communications when Internet isn’t available.
Thus… if Amateur Radio wants to retain (and grow) NewTechHams in Amateur Radio, Amateur Radio over Internet activities need to be much more widely known and evangelized within Amateur Radio to attract and interest the Internet native NewTechHams. Specifically, it needs to be widely understood that the pervasive “that… isn’t Ham Radio” attitude be retired.
Currently, emergency communications in Amateur Radio is primarily promoted for involvement with “served agencies”. While some NewTechHams might be interested in such activity, as explained above, it’s likely of much more interest to NewTechHams that Amateur Radio can be used as a backup for personal communications. Example - promote AREDN, use of VHF / UHF repeaters, and easy to use HF radios.
Data Primary, Voice if Necessary
NewTechHams generally prefer text communications because it’s simply more efficient than communicating via voice. There’s a record, typing is second nature to them, and they use text messaging systems in their jobs (example - Slack), in their personal communications (example - Signal), and in their recreation (example - Discord). Thus they have a similar perspective in their consideration of Amateur Radio… “I don’t want to talk, I want to text”.
Thus… if Amateur Radio wants to retain (and grow) NewTechHams in Amateur Radio, text messaging and data communication modes need to be promoted and be widely available. Examples - DigiPi (multiple data modes), IP400 Network Project, and Winlink (especially using apps such as RadioMail).
More Interested in VHF / UHF than HF
This is the most subjective aspect of this article, but my observation is that NewTechHams are generally more interested in experimenting and operating on VHF / UHF, mostly because the equipment is less expensive (such as portable VHF / UHF radios versus HF radios) and especially because the overall requirement for larger, outdoor antennas for HF is problematic (living in apartments, rental homes, and homeowner’s association restrictions). But this is rapidly changing due to:
More powerful, reliable data modes in use on HF such as JS8Call,
More inexpensive options of Software Defined HF radios such as zBitx, and
New types of low profile (stealthy) HF antennas such as Magnetic Loop Antennas.
Thus… if Amateur Radio wants to retain (and grow) NewTechHams in Amateur Radio, these factors have to be considered in recruiting NewTechHams such as offering good VHF / UHF options such as powerful, sensitive VHF / UHF repeaters, or careful recommendations of starter HF modes, radios, and antennas rather than “just buy a used HF rig at a hamfest”.
Mistaken and Managed Expectations
For the past two decades, NewTechHams have been using mobile devices over cellular networks that provide voice and Broadband Internet Access. That these mobile devices over cellular work so well is a function of uncountable billions of dollars in collective infrastructure development (multiple generations of technology) and incredible advances in computational and resulting computational-based radio technology.
Thus NewTechHams sometimes don’t understand why, when attempting to use a VHF / UHF repeater via a small portable FM radio, it doesn’t work as well as a mobile device. It looks like a (simplified) mobile device. Adding to that confusion are Push To Talk over Cellular devices that look very similar to small portable FM radios.
Thus the experience of a NewTechHam attempting to use a small, portable FM radio via a VHF / UHF repeater is far less than impressive than their experiences using a mobile device over cellular.
Using Amateur Radio data communications systems is similarly “less than impressive”, especially legacy 1200 bps AFSK. Even VARA FM which can achieve up to 25 kbps using modems with “voice” radios isn’t very impressive to NewTechHams.
One of the reasons that I feel that 2025 is an opportune moment to develop and promote the IP400 Network Project is that expectations for independent mesh networked data / messaging systems is that Meshtastic has set (low) expectations, and IP400 can easily exceed those expectations. Thus IP400 can provide an incentive to become involved in Amateur Radio, because IP400 (will, eventually) work better than Meshtastic.
Thus… if Amateur Radio wants to retain (and grow) NewTechHams in Amateur Radio, Amateur Radio needs to be able to offer relevant voice and data systems, and where necessary, offer information and manage expectations.
Example messaging:
This (photo) is a handheld device using cellular networks. It works well because there’s billions of dollars invested in development of the technology and deployment of the networks.
This (photo) is a handheld device using Amateur Radio. It uses a radically simpler technology - VHF / UHF repeaters, with a few thousand dollars invested in maintaining each repeater.
That’s why when the cellular device (rarely) fails, the handheld device using Amateur Radio still works, because it’s simpler, decentralized, and independent of cellular networks.
IP400 - Everything you love about Meshtastic4 such as off-grid mesh networking, but much faster and much more reliable using Amateur Radio.
Walled Gardens and Paywalls Versus Open Access
Given their experience with open source and being Internet natives, NewTechHams generally prefer to self-educate when learning about something new like Amateur Radio. Thus, they look for what they can find on the Internet, especially video and other short, easily readable text such as Wikipedia.
What NewTechHams generally do when trying to learn about something new is see what they can find on their own (independent learning) on the Internet, such as YouTube or TikTok, publications such as The Communicator and Amateur Radio Weekly, Wikipedia articles, the Digital Library of Amateur Radio & Communications (DLARC) project of the Internet Archive, and most recently using Artificial Intelligence (AI) systems to ask questions such as “What is Ham Radio?”
What’s common to all of those independent learning sources is that they are all open media. That is, not hidden behind a paywall, accessible only to “paying customers”. Many, perhaps most current Amateur Radio Operators consider it “normal” to join an organization such as a local club, technical club, or national organization to access paywalled material such as the club newsletter, AMSAT Journal, or QST. But that’s just not the typical perspective of NewTechHams. Thus such content isn’t an “incentive” to join and financially support those organizations. That content is effectively invisible from independent learning, thus nearly irrelevant to NewTechHams.
Thus… if Amateur Radio wants to retain (and grow) NewTechHams in Amateur Radio, good instructional material must be made available at no cost, and publicly available via Internet. While the examples cited above are good references for individual subjects, there needs to be a more comprehensive treatment of Amateur Radio as a whole such as an open source equivalent to the ARRL Amateur Radio Handbook, perhaps titled “Amateur Radio Open Source Omnibus” with elements from open source material such as 73 Magazine in DLARC.
Software First, Hardware Second, and Cheaper Is Better
As explained earlier, NewTechHams generally prefer software based systems that can be experimented with and changed versus “fixed” hardware. For example, the TIDRADIO H3 portable radio has an active community developing alternative firmware versions for it. The Yaesu FT-4XR portable radio is a capable unit from a major Amateur Radio manufacturer, but its functionality is fixed. Thus, to NewTechHans, the H3 is generally preferably to the FT-4XR.
Another factor to take into consideration with NewTechHams is that they didn’t grow up with as much hands-on experience with electronics such as assembling Heathkit units with soldering irons. NewTechHams generally experimented with electronics units such as breadboards and Arduino and assembling their own custom personal computer from modules such as motherboards and disk drives. Thus the usual advice for Amateur Radio experimentation of “Just solder together…” or “Make a cable…” can be a “showstopper” for less experienced NewTechHams.
Frugality… is the one area where there is almost total overlap between NewTechHams and traditional Amateur Radio. Both groups are cheap. NewTechHams grew up with powerful digital technology being available for low prices, especially considering mail order from China… prior 2025, anyway. Older Amateur Radio Operators learned how to economize in their Amateur Radio stations such as modifications published in a magazine, making their own cables instead of buying prefabricated cables, etc.
Thus… if Amateur Radio wants to retain (and grow) NewTechHams in Amateur Radio, there needs to be emphasis on “software hackable” technology, minimal hardware tinkering required (especially minimizing soldering), land there needs to be many inexpensive alternatives available at the entry level. For example, the DigiPi project addresses all three of these areas:
DigiPi is open source and thus software hackable.
DigiPi can be assembled easily from widely available hardware such as N7EBB’s Radio Interface Board or the Masters Communications DRA-Pi-Zero REV2, both of which are available in either as a kit to be assembled, or fully assembled.
DigiPi can be assembled inexpensively depending on options you choose.
DigiPi is also very well supported by the developer with videos and responsiveness on a email list.
In conclusion, I think NewTechHams offer a needed “shot in the arm” to Amateur Radio just at the right time as the opportunities for innovation and experimentation in Amateur Radio have never been more widely available due to new, more widely available, and inexpensive radio technology.
But to attract NewTechHams into deeper involvement with Amateur Radio, their unique characteristics need to be recognized, accommodated, and most importantly utilized. Just one final example - if a radio club wants to find and promote new younger members, they need look no further than the local Makerspace or high school STE(A)M program. But the club needs to be prepared for those potential new Amateur Radio Operators and club members to “think different” than “traditional” Amateur Radio, as in meeting them where they are (digital, text, software) rather than “we need to get you licensed and then you’ll be able to have fun on HF”.
ZR > BEACON
By Steve Stroh N8GNJ
Short mentions of Zero Retries Interesting items.
SDR++ with Digital Speech Decoder (Florida Man Edition!)
Craig Lamparter KM6LYW via Patreon:
Let's use a cheap Software Defined Radio (SDR) to listen in on Digital voice signals. Yaesu Fusion, DMR, DSTAR and P25 are easy to listen to with SDR++ and the Digital Speech Decoder "Florida Man Edition"! A ham radio license is NOT required to listen to digital voice. Listen in on emergency services, local businesses, and ham radio. You get reasonable high quality audio with no hiss or static. The business band conversations are particularly interesting since they assume nobody can hear them :).
This video is, in my opinion, a fantastic example of having fun with radio technology. If you aren’t familiar with digital voice modes, this is a good primer and example fun project. Kudos to KM6LYW for this one!
# # #
Are Multi-Carrier Data Modes Illegal in Amateur Radio?
Michelle Thompson W5NYV on the Open Research Institute website and blog:
Mike McGinty raises a legitimate question about the interpretation of Part 97 rules regarding emission types and digital codes, particularly for multi-carrier data modes like LTE. The core of the issue appears to be in two parts of 47 CFR Part 97…
The entire article is worth a thorough… but not too thorough read (don’t twist yourself in mental knots trying to follow every nuance). I speak from experience trying to fully parse particular Part 97 sections, following the footnotes, etc. For me, doing so is headache-inducing.
One’s answer to the question in the title largely depends on whether one prefers, in Amateur Radio, to “Ask for forgiveness?” or “Ask for permission?”
For the former perspective, the answer is no. There’s reasonable latitude in Part 97 for experimentation, most notably:
The provision in §97.309(a)(4) indicates that “An amateur station transmitting a RTTY or data emission using a digital code specified in this paragraph may use any technique whose technical characteristics have been documented publicly”
Assuming, of course, in their experimentation, one does actually “document publicly”.
In my, and Zero Retries’ advocacy of experimentation in Amateur Radio, I very much advocate the “ask for forgiveness” perspective. And of course, documenting publicly. One excellent example of “documented publicly” is Interleaved Improved Layer 2 Protocol (IL2P) Forward Error Correction (FEC) protocol now available as an option in the NinoTNC, Dire Wolf Software TNC, and MMDVM-TNC.
One Zero Retries commenter described Part 97 as “a maze of twisty passages” which I think nicely captures the absurdity of Amateur Radio regulations that, over nearly a century have accreted, been revised, adapted, and in some cases “transmogrified” into the current version of Part 97. In the era of “writing a new radio” using Software Defined Radio technology, Part 97 is nearly incomprehensible and borderline absurd. Fixing it… ay, there’s the rub.
# # #
Langstone (V2) VHF / UHF Software Defined Radio Project
Zero Retries reader David Gleason NR9V via email:
Thought I'd share a video on a cool SDR project - Langstone -
which seems to have great potential and that could be a good starting
point for a Superpeater SDR platform. They have already integrated my
UCI120. Once a few more details are worked out I'll likely look into
doing a product that integrates all needed RF filters, switches, a small
PA, and maybe some of the UI buttons & knobs.
NR9V builds amazing gadgets in his company Allscan.
NR9V is correct that this project is very Zero Retries Interesting - a great combination of Software Defined Radio plus VHF and UHF power amplifiers so the SDR modes can be actually used on VHF / UHF to communicate with others. Different from the unit used in the video, Langstone V2 incorporates additional options for the SDR including Lime SDR Mini and Lime SDR Mini V2, which have wider frequency coverage than the ADALM PLUTO used in the video.
So… many Zero Retries Interesting projects, so little time of late. But that’s a fun problem to have too many wonderful options, rather than too few.
# # #
Meshtastic Publishes Special Firmware for Hamvention 2025
Amateur Radio Daily:
The Meshtastic project has released a special firmware build for users that are attending Hamvention. The dedicated firmware is designed to reduce confusion and instability experienced by users attending Hamvention in 2024.
The event firmware includes hardcoded sensible defaults to help ensure mesh stability in the dense environments we see at events like Hamvention. These include: 🚫 Blocks non-standard port numbers 🚫 Disables public MQTT 🚫 Caps hop limit at 3 📉 Forces conservative telemetry/nodeinfo intervals
Additionally, Dayton Hamvention firmware is configured with: Preset: Short_Turbo (20× bandwidth of LongFast) Channel 31 — 917.25 MHz 3 default channels: • Hamvention • NodeChat • YardSale
The special Hamvention Meshtastic firmware can be downloaded and installed from the Meshtastic website.
Now that… is Zero Retries Interesting. Good thinking on Meshtastic’s part and I’m going to have to find a friend that has a Meshtastic device at Hamvention and see how much fun there is to be had with Meshtastic in a dense user environment. Most of what I read is “my node is up… where is everybody?”
# # #
AREDN Production Release 3.25.5.0
AREDN website / blog:
Major Enhancements:
Babel Routing
Deprecating Tiny Firmware Nodes
Migrate Legacy Tunnels
PtP and PtMP RF modes
Full details are in the link. Babel routing is now AREDN’s primary mesh routing protocol, and (by my reading) the next Production Release will make Babel the only mesh routing protocol… and the migration is going great.
Kudos to the AREDN team for all this amazing work!
Comments Summary From Previous Issue
Administrivia: I have recently begun closing comments after commenting wanes. Comment early, comment often! 😊
…
Comments from Zero Retries 0200:
Mention of Lynovation tuning knobs for use with Software Defined Radios.
Congrats on 200+ issues of Zero Retries
Discussion of GMRS repeater linking (disallowed by current FCC regulations).
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Footnotes for this Issue
To see the relevant sentence for the footnote, just click the footnote number.
Use of ARDC’s 44Net IPv4 addresses require an Amateur Radio license, thus out scope for this article.
Sometimes arrangements can be made with, for example, educational institutions for use of publicly routable IPv4 addresses or blocks.
LinkedIn: “I got my RTL-SDR dongle working”… probably best not to list that. But “Helped put up a new node in a wide area microwave network!” - definitely mention that!
Assumes that there will be a handheld device app similar to the Meshtastic app such as a version of RadioMail for use with IP400.
NewTechHam here. (The suffix of my callsign, K4HCK, is short for "hack"). This all rings true and I wanted to throw out a few more points to help bolster the argument.
This trend started 15 years ago (maybe longer) and was the primary driver for me and many others getting licensed. I wanted to push data around something other than the internet (been doing that a long time) and RF seemed very interesting in terms of what might be possible. My first exposure was a coworker launching balloons into sub-space to capture photos. Amazing!
Going beyond "software first," I'd like to get the term "API first" circulating as a more specific concept. Thinking about something like IP400, my ideal use case would be to write a Python script that hits a simple API endpoint to transfer whatever data payload I'm interested in moving (text, image, etc.) across RF. The hardware side of it is interesting, but I don't want to spend my time tinkering on hardware. I want to get creative with software.
https://swagger.io/resources/articles/adopting-an-api-first-approach/
It's very true that 1200 bps AFSK and adjacent modes are viewed as archaic. There's some fun to be had there, especially from a nostalgia perspective, but it's very limiting. Outside of amateur radio we've moved past all that.
Sadly, Othernet is dead. I loved this concept back when it first started and bought initial hardware. Unfortunately, the initial hardware quickly became obsoleted with the repeated ground-up redesigns and lack of roadmap.
I had not thought of myself as a "NewTechHam" but clearly I am. I like computers. I like amateur radio. I like mashing the two domains together in ways that might work.
We've moved from wired communications to wireless communications, but those eras were dependent upon hardware. More recently, we've seen software defined radio become a good tool for radio amateurs. Some of us are involved in the newer layer where we focus on software and systems. Instead of hardware being the driver for how we communicate, software is the engine and hardware becomes either secondary or used for the specific purpose of working with software (and as Cale points out, APIs).
I'm reading a great book (in my ample free time!) titled Range, by David Epstein. David makes a strong case for creativity arising when people sample many careers and activities. His book is about how generalists often become the most successful people. What strikes me is he is describing people who are able to integrate ideas from seemingly disconnected domains when working on a problem.
I think NewTechHams are integrators, pulling together bits from this and that to create and use solutions that address needs they have identified. I never thought web coding would be useful in amateur radio, but it is. Many of my life experiences have intersected with my interest in radio.
This is an exciting evolution in our amateur radio hobby and I'm very curious what new branches will spring from this tree!