Why Modern Makers Are Bringing Back Ham Radio
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How long has it been since you could solder your own transceiver for a practical purpose? I'm talking DIY "wifi" with a range of tens of kilometers (of course ham radio restrictions apply).
AX.25 is ancient and slow, I want to watch youtube over packet radio internet with my ham radio license. Because... why not?
The only guy working in this field I am aware of is this one http://lea.hamradio.si/~s53mv/
Insecure, but that's exactly the point.
(Also: ham radio in general, not just the FCC. Over here, it's the BNetzA.)
Now I know what the immediate response to that is, because it's mine too, but your problem with drive-by, opportunistic eavesdropping is semi-solved if the location of your keys is only known to your logbook and any inspectors who come knocking.
Besides, there may be wiggle-room for allowing encryption on new bands in the future, given that all mobile and most home internet use is over radio now anyway. Exciting times. I'm just about to take my test for the Intermediate license in the UK and this is the direction I want to research. 5G area-wide networks, micropayments, etc.
As a side-note, I hope I live to see a true zero infrastructure meshnet internet, where every house or device has an omnidirectional HF/VHF/UHF antenna to connect to the completely decentralised web, at speed, for all comms. That'd be neat.
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EDIT: Some resources I've dug up:
- http://www.qsl.net/kb9mwr/projects/wireless/Data%20Encryptio...
- https://rietta.com/blog/2009/08/17/authentication-without-en...
- http://rsaxvc.net/blog/2014/2/1/Encryption%20and%20Amateur%2...
Clearly much room for discussion and interpretation still. And these rules vary per country, so you can imagine picking up broadcasts from more lax countries that were encrypted...
As to YT over ham radio: there's ATV (amateur television) and you can/could? (check your regional regulations for audio broadcasts) send radio streams on some bands. As long as it stays true to the ham-spirit, you should be ok.
(I can't speak for what the ARRL allows on what bands and so on, i have an old yearbook stashed away somewhere, but i'm not american, so...)
vy 73
It seems that most (or at least very many) hams just do contesting, where there is no innovation or even just learning something new at all and doing well is just a matter of good antenna placement, high power (except for QRP), training and perseverance in repeating the same letters for hours on end. For decades!
Antenna and transmitter characteristics (the equipment is off-the-shelve anyway) and propagation conditions (in contests, all signals are 59 anyway) are really well-researched by now, so why are we wasting time and bands on contests?
Unfortunately most hams don't take the suggestion to stop contesting too well.
Contests don't serve any of these well. Stations are being used outside of contests too, and DX QSOs are being done outside of contests too (besides, DX capability isn't that important in case of disaster. also the DX bands 'need' unwieldy antennas and the skywave unreliability and the ground/skywave gap doesn't help. the local 2m/70cm repeater would be much more useful -- portable 2m/70cm HTs are cheap+common.).
There are hams that do care about disaster communication and prepare for it. These are good to have. It involves more than contesting though (e.g. actually transmitting information instead of skipping even trivial things like proper signal reports just to be faster, advance coordination with civil services, independence of power grid...).
Emergency communication is important, but ham radios other purposes are at least equally important. Society profits just as much from people getting into and experimenting with RF, or from communication between peoples. Also, it is generally understood that amateur radios role in disaster scenarios is to support official emergency responders, not itself be "societies backup". It's not about being independent of the state (I'm not implying you said that); quite the opposite.
Contest rules are made by whoever organized the contest - typically the International Amateur Radio Union or a national or regional group. These are democratic and composed of hams.
Besides, it isn't just a matter of rules, it's a matter of physics too. Contests are mostly about long-range (DX) communication. Disaster recovery needs reliable short- and mid-range communication. Different bands and/or different antennas.
Most of the contesters I know are deeply interested in station building and in leveraging the technology as much as possible. Many have innovated lots of the computer systems, switching systems, and antennas that they are using.
It's really sad to see someone (on HN no less) so negative about one of the more exhilarating aspects of the hobby. There is plenty of spectrum for everyone, and surely you can find areas that are interesting to you without casting a negative shadow on things that are interesting to other.
I'd like to retract the "lack of interest in exploring new things" part. Firstly, because I was really wrong: plenty of new things are being worked on. Secondly, because not everyone can have a strong EE/CS background and push the state of the art. And ham radio is quite a technical hobby even at a basic level.
Also, sorry for sounding so negative. I do recognize that ham radio is a hobby and people find contesting fun. I don't find contesting useful, but I know that's not the entire point and I see yours.
However: engineering is also about solving problems right, whereas much of ham radio is about doing what seems to work. And contests let you use your station, not test it well.
There are different dimensions to station testing. Contesters usually attempt to maximize the communications path with a wide geographical area.
Since other stations are often using fairly poor antennas and low power, a contest station usually has high gain antennas and legal limit amplifiers... Asymmetric communications channels are just part of the game. A contest station that is S9 to you might be barely copyable somewhere else in the world.
So there is antenna strategy (gain, rotatability, radiation angle, polarization). Not to mention tower placement, tower loading, inter-station interference, etc.
There is also operator strategy... things like rate maximization, multiplier maximization (moving multipliers, being aware of band openings and propagation conditions, etc.). Not to mention fatigue, sleep strategy, when to eat, use the restroom, etc.
The ergonomics of radio and computer interfaces (screens, knobs, CW paddles, antenna switches, headphones, etc.) are all areas for optimization.
When you look at the composition of the team who wrote N1MM logger, it's a bunch of people who have had all sorts of high caliber software careers, including NASA.
There are so many brilliant people who for the sake of fun and competitive spirit advance the state of the art.
So yes, contesting serves no purpose (though it's conceivable that if something happened the mainstream communications grid we'd be glad such stations existed).
But no sport serves a purpose, nor does any art. Contesting is both.
802.11b has a bandwidth of 22 MHz. The entire 2m VHF allocation for amateur radio is 4 MHz. The entire 70cm UHF allocation is 30 MHz, and there's another 26 MHz at 33cm.
Now, with a license you can use much higher output power (up to 1.5 KW depending on the band), including on 2.4 GHz. A high-gain antenna and some power can go quite far. And there's also fast-scan Amateur Television (ATV) and slow-scan television modes that can be used as well.
But if you're using it to watch YouTube you're kind of missing the point of amateur radio - it's about communication, not watching Youtube videos. Things like embedded meshes and other experimental work are fine, but YouTube is really more of a cellphone thing.
For building electronics, there's the strong ham radio tradition of homebrew and kit assembly of various transmitting/receiving equipment.
Also, there are a number of widely used digital modes, such as PSK31, JT9, WSPR, etc.[e.g., 0, 1], several of which are relatively new. They have low data rates but work quite well with narrow bandwidths and low power. And as @PaulHoule mentioned[2], there is also APRS.
[0] https://en.wikipedia.org/wiki/Psk31
There is so much exciting stuff going on. My current "maker" interest in ham radio is designing a distributed SDR system using FPGAs. I'm still a ways out from a prototype, but the chips keep getting better.
I do a fair bit of HF contesting and CW as well. When I was first licensed I had to take three separate CW proficiency exams, but these days it's no longer a requirement. The beauty of CW is the simplicity of it and the way it's a highly effective weak-signal mode.
I strongly encourage anyone with an interest to dig deeper. It is a very broad hobby and so you might find an entire club doing things that you have no interest in, but keep trying, as there are so many highly active niche areas to choose from.
There is also (thanks to the maker movement) a tremendous amount of great learning material about electronics. W2AEW has a superb youtube channel, and 4Z1UG has a great podcast for anyone getting into it (though he's currently interviewing the older people to capture their stories while they are still around).
Open Source Two Way Radio: https://www.youtube.com/watch?v=xDeMT7eUf4c
BTW, anyone likely to be reading this in the US can earn an FCC Technician license granting full privileges to the VHF/UHF bands David discusses here in maybe 5-6 hours of study.
There has not been any movement in this area and I hope that there never is.
I'm a privacy zealot, but the spirit and discoverability of amateur radio would be diminished if all the traffic was just static.
PERHAPS a small band could be allocated for secure comms experiments... but I don't know. Besides, wouldn't encrypted noise over the air be confusing to others? Wouldn't people just broadcast over each other?
People trying to do what, exactly? And how would existing ham users benefit by having the bands taken over by those commercial activities that the FCC regulates under other parts?
There are multiple roadblocks:
FCC part 97.113(A) prohibited transmissions contains:
"(5) Communications, on a regular basis, which could reasonably be furnished alternatively through other radio services."
So... if all you're trying to do is replicate a wirelessISP or satellite internet service, but do it for free on the ham bands, well, that's illegal in and of itself aside from encryption. This part of the law has occasionally caused controversy for the RC airplane people on the 6M band, the "text email service for sailboats" people on HF, couple others.
And if you live near the border of a country or have impressive range there's part 97.117.
And there are interesting regulations for 3rd party traffic across international boundaries.
And there are pecuniary interest regulations, so no doing work or getting paid for it or having money change hands except under relatively weird and limited forms.
Its not as simple as crossing out a couple words in 97.113(A)(4) that prevent "messages encoded for the purpose of obscuring their meaning". That alone will not magically let wireless ISPs offer service pretending to be ham radio.
In that sense, encryption might be viewed at the very least as being selfish by some; and at the worst, some jurisdictions would start having to think differently about threats on ham radio bands.
As such, privacy is not a goal of amateur radio at all. If you desire private communications, the FCC offers different (more costly) licenses for that. There's also the internet.
What do you think about this?
The extent of my calibration of a cheap SDR dongle is just adjusting the PPM to correct any offset.
Something I've noticed about maker movement is to maintain the cultural pool cohesion or whatever they don't socialize with existing clubs, teams, groups in other hobbies, leading to, at best, reinventing the wheel, at worst, safety situations. Starting with zero person-years in a makerspace is probably unwise if the local ham radio club meets across the street on a different day and has person-millennias of combined RF experience. Not to mention online groups, podcasts like the soldersmoke guys...
Its hard to come up with something strictly ham radio that isn't more widely applicable to electronics in general. But possible...
Generally the hams are extremely talented at metalworking and trad carpentry for cabinets and RF component structures. I'm sure that could be 3-d printed and laser cut plywood and who knows what else. Imagine printing out a new custom plastic case for a field radio. Could you print out a power distribution panel, its just an array of rectangular holes, perhaps designed specifically for powerpoles to snap into. Could you print out low/medium power coil winding forms? For high power use you could remove the PLA if the copper wire is thick enough to self support. I've been fooling around with printed temporary antenna components. Fooling around with, as in "breaking" but eventually I'll print something that works. I (very briefly) talked to a guy who sewed a vest thing for his goat and his goat carries radio gear to the top of a mountain where he operates just for fun. I'm sure thinking outside the box someone could laser cut a wood backpack antenna support for backpack mobile people. Microwave waveguide work has been traditional metalworking and brazing, but maybe 3-d printing fixtures and things? There's some waveguide stuff on thingiverse but I'd be happy starting out with just WR-42 standard flange dust caps to snap on the unused end. (WR-42 size waveguide is for 24 GHz ham band, others are also useful). Alignment jigs and things? 3d Printed mounting brackets to attach standard microwave horn antennas to tripods? Basically anywhere you'd see a ham using 2x4 wood cutoffs and duct tape, a printer and lasercutter could do better.
Most of the above is "in my infinite spare time I plan to..." who knows how many ideas you'd get from a large club.
The ham radio construction / homebrew group is "probably" larger than the group of makers specifically into electronics. The hobby is big enough that it should be easy to find an existing spot to extend.
Its useful for non-hams to know this is a very old and unkillable meme.
There are other long lived memes in ham radio such as its impossible to build equipment at home anymore, its impossible to install/solder whatever connector everyone is using at this time (anderson powerpole for DC, PL-259 RF connectors, hardline connectors, etc), its impossible to do surface mount at home, my antenna system is great but anyone who spent less than me has a "compromise antenna" because they didn't spend as much as me, all frequency bands above which I operate are line of sight only (no matter if that's 80 meter phone band or 47 GHz the ops say it the same way). There's been trolling on the voice band segments of 80 and 20 meters since at least the 50s. Another popular meme is ham radio might be an infinitely large map to explore for a lifetime but my favorite activity is "real ham radio" with a side dish of the map may be infinitely large but how far I've gotten, no matter how small, is as large as the whole thing is. Hams do have amateur physicists who understand radio propagation vs the ionosphere as well as any professional, but there's probably two guys disseminating pure bro-science for every reality based amateur physicist, I donno if broscience counts as a meme, I guess so. There are a lot of weird memes about age and ham radio because to some extent money and time result in a longer ranged station, therefore most of the guys you'll talk to have the longest ranged most expensive stations therefore you'll get the peculiar idea that all hams are 70, whereas what it really means is if you spend a lifetime building up your station you tend to end up with a really impressive station just before you die.
I refer to the 50s alot above not because it started then, but as a third generation ham, my ancestors had a lot of old magazines and books to read when I was growing up. The hobby mostly being male and often transmitted from father to son is highly susceptible to the overall cultural trends WRT single parenthood and boys growing up without male role models.
I grew up without male role models. I turned to Doom and Linux. Needless to say, I didn't score until my teens were over.
They are able to, among other things, hack together Wi-Fi routers that can operate over longer distances and use more power than standard, commercial Wi-Fi.
http://www.broadband-hamnet.org/just-starting-read-this.html
"Mesh nodes can easily have a range of 10 miles or more using stock power and gain antennas if you have true line of sight"
"Mesh nodes on channels 1-6 use FCC part 97 rules instead of part 15. This allows big antennas, more power, other changes"
In lots of commercial WiFi appliances, power is software-defined. And norms have their own power index. Values can be tweaked using free software solutions/a bit of magic.
In addition with networking technologys, power amplification,...
It's totally legit, quite accurate, and underestimating the reality.
Up to 1500 watts in the US.
Various specific frequency ranges have lower limits either across the board or in specific geographical areas (e.g., there are some restrictions near the Canadian border, and near White Sands Missile Range), but I don't see any that apply to the amateur bands that overlap with wifi bands.