Shortwave Radio and The PC 116
An anonymous reader writes "Ars Technica has an indepth guide on the Ten Tec RX-320, a shortwave radio receiver that connects to the PC and is controlled by software (both Linux and Windows). The article goes into depth on different high frequency modes, broadcast shortwave, and even a bit on ham radio and new digital modes."
The Point? (Score:3, Interesting)
How about the internet over short wave? (Score:1, Interesting)
Just wondering.
Re:How about the internet over short wave? (Score:4, Informative)
Re:How about the internet over short wave? (Score:2)
But I am really not any kind of expert here.
Re:How about the internet over short wave? (Score:3, Informative)
Yes it can, just create a lot of interference.
Its not even that hard to do (when you consider that its governments that might want to do so).
You might also like to do a bit of research into what sunspot activity does to short wave radio transmission.
Re:How about the internet over short wave? (Score:3, Funny)
Re:How about the internet over short wave? (Score:4, Interesting)
When I played around w/ Packet Radio there were a lot of problems, collisions, weak transmitters come and go, the retries and lag time is tremendous - the buzz at the time was: don't expect to be able to d/l PacMan video games using Packet! Whats the max packet baud rate these days? 9600? On HF it's even lower.
At work I can ping a remote site and get a response in about 70 milliseconds, going thru about 20 routers. Packet radio can't touch that.
Look into PSK31, it's an interesting active mode these days for point-to-point qso's, an HF chat room if you will.
Shortwave + Internet problems (Score:4, Informative)
I don't think we will ever see the stability or bandwidth to make shortwave support anything that geeks would consider useful. Ham satellites are a little more promising. If we had a Wifi via Ham satellite, now THAT would be fun.
Re:How about the internet over short wave? (Score:1)
56k packet is being successfully utilised, and some groups (Japan. there may be others)
Are experimenting with faster speeds.
check out http://www.paccomm.com/ for the WA4DSY modem
Re:The Point? (Score:4, Informative)
Internet radio taking over shortwave, maybe, in some ways. They really are two different media, though, with different strengths. And there are still places in the world where not that many people have access to a computer or an ISP, but they still may have an old SW set to listen to the BBC.
(And for the romanticist, there's nothing like listening to a cricket match between Fiji and the Solomon Islands teams over Solomon Islands radio, commented in Pidgin English, by the glow of shimmering tubes!)
An example (Score:3, Insightful)
She is only able to check her email around once a month or less, and the only telephone is a multi-dollar-per-minute satellite phone.
She is never more than a day behind on world news thanks to BBC shortwave.
Re:An example (Score:2)
So - it isn't going to replace broadband anytime soon. (Well maybe UHF packet will
Re:The Point? (Score:2)
Even if you run a coax cable to an outdoor antenna, it still picks up interference from the nearby PC, because it is impossible to match antenna to the cable perfectly for all frequencies. LCD screen and well-shielded PC case can help a lot. Still, I haven't seen a setup without problems.
Re:The Point? (Score:1)
Re:The Point? (Score:3, Informative)
No doubt other technologies are developing rapidly. Actually, internet radio is just one. But shortwave is still the only way for people to hav
Re:The Point? (Score:2, Informative)
scaling (Score:3, Informative)
Re:It's still going (Score:2, Informative)
Re:It's still going (Score:3, Insightful)
Also - the author states that ham radio isn't dead. I'd counter that it is indeed sick at this point. The average age of amateurs is constantly rising. There is almost NO new blood coming into the hobby. When I first got licensed, I joined a ham
Re:The Point? (Score:1)
But they can't block shortwave. Even if it's from another country.
Re:The Point? (Score:1)
Icom do them, too (Score:4, Informative)
I was about to say (Score:2)
Icom has a LOT of neat receivers, such as their "super scanners" (Which is what I like to call their scanners that have video capability.)
Re:Next story... (Score:1)
It's not rocket science.
Possible apps... (Score:5, Interesting)
2. Terror alerts - need we say more?
3. Service Pack alerts! the best of the lot. We could have daily bulletins, sponsored programs by virus writers, chat shows with hackers etc.
Good stuff.
Re:Possible apps... (Score:4, Funny)
I have a weather alert device adjacent to my computer. Despite being called a 'window', it hasn't crashed yet, although as I'm in England, I do regularly get the grey screen of dampness from it.
Re:Possible apps... (Score:1)
Re:Possible apps... (Score:2, Insightful)
Re:Possible apps... (Score:2)
Re:Possible apps... (Score:3, Interesting)
Two things:
a. kweather [jhochwald.de].
b. One word: *window* (you know, that big glass thing in the wall that let's you look outside
2. Terror alerts - need we say more?
Yeah, because as we all know terrorists are gonna wait until the condition is orange or red before they strike!
3. Service Pack alerts! the be
Re:Possible apps... (Score:2)
Re:Possible apps... (Score:2)
2. Uhh, you mean "The News"? Yes, the news is already being broadcast worldwide, and includes such information as weather and terrorism information (although I don't see the big deal, terrorism has been happening forever and there have been very few deaths because of it. Now, suddenly, everyone is convinced there is a terrorist on ev
Interesting (Score:3, Interesting)
Just wondering, I am not an expert on this field.
Re:Interesting (Score:2, Informative)
Re:Interesting (Score:2, Informative)
Re:Interesting (Score:2, Informative)
IIRC, there is support for it in the more recent Linux Kernels (as a module).
I've seen some small Packet Radio setups but it doesn't seem to be as popular as it could be (for reasons a packet radio nut should probably explain)
Re:Interesting (Score:2)
But I am just wondering about it. I have no idea if it could be done or not.
Re:Interesting (Score:1)
But I am just wondering about it. I have no idea if it could be done or not.
Well, yes, it could be done but the problems you would have make this pointless. Interference from sunspots, low bandwidth, expensive equipment (for large scale/high power work). Someone with better knowledge of this sort of thing will need to flesh this out for you (I'm not an expert)
Packet and TCP/IP (Score:5, Informative)
Of course, the issue is "Would you want to" on HF. (aka shortwave)
The answer is No, unless you're on some remote island in the South Pacific where there are no phone lines and satellite connections are multiple $$$ per minute, in which case a 1200 (or slower) bps connection is a godsend.
The legal limit on channel bandwidth in most HF bands is on the order of 3-6 kHz (Enough for SSB voice). Since there's lots of noise on HF, advanced modulation schemes that allow you to stick more than 1 bps per Hertz usually don't work. Most HF data connections are 2400 bps or less. (300 bps is quite common, and currently the most popular digital mode is PSK31 at 31 bps, due to its bandwidth being narrower than Morse and having superior noise immunity to any faster data mode.)
Re:Interesting (Score:2, Informative)
http://linuxjournal.com/article.php?sid=1071
Re:Interesting (Score:1)
The inspiration for Ethernet was a packet radio network in Hawai called ALOHANET. So yes, it can be done
Re:Interesting (Score:1)
Bah... everything seems to provoke dejavu these days
Re:Interesting (Score:2)
The speed of the connections is incredibly slow, and at that, it takes a lot of equipment, and work to setup.
Really now, who would want that? People are better off with SW radios, and using that frequency for something reasonably important.
SW is not Dead! (Yet) (Score:5, Informative)
In some countries like Africa, SW radio is the only medium that a population that might not be able to read can rely on for information/education. See hoe the success of the Clockwork radios depended on Charitable organisations using them in continents where electricity supplies were rare.
SW radio is still the only way you can listen to radio in some places, simply because of the durability of the signal over long distances, and the relatively low cost of equipment.
Hang on, then why the hell would I want to attach one to a PC? Surely even the pleasure of DXing doesn't get augmented with use of the PC.
Now where's my morse-button...?
Re:SW is not Dead! (Yet) (Score:1)
Oh, my! When did the various countries on the continent of Africa unite to become one country! Why did no one tell me? I saw no mention of this on CNN, FOX News, anything.
Re:SW is not Dead! (Yet) (Score:2)
On the other hand, SW receivers don't like PCs nearby unless they have been very well shielded.
Re:SW is not Dead! (Yet) (Score:2, Interesting)
Lots of reasons, but one is that SW listening conditions are changing constantly in only somewhat-predictable ways. If you are a dedicated DXer it can be both helpful and fun to exchange notes (quickly!) with other DXers.
Used to be, that happened via print media that was always pretty out of date by the time one got hold of it, or via radio programs that one had to ha
Re:SW is not Dead! (Yet) (Score:2, Interesting)
Shortwave (better known as Worldband) is far from dead. I was a Peace Corps volunteer in the mountains of Nicaragua from 1998-2000 and I was as addicted to SW in those days as I am to the internet today.
In remote sites and in poor countries where the internet is still basically another planet, the radio is still a regular and important source of news and information. Shortwave has certainly decreased in importance but it's by no means dead.
That said, there are new projects that may bring it back into v
Re:SW is not Dead! (Yet) (Score:2)
But the Ionosphere has its own advantages, one being that it is totally free to use. Imagine, you are not relying on a corporation's infrastructure to carry your transmissions.
With conventional shortwave you can use relatively low cost transmitters, though where your signal actually ends up is sometimes anyone's guess.
Re:SW is not Dead! (Yet) (Score:3, Insightful)
Believe it or not, the radio interface -- all the switches, dials, and displays -- add a LOT to the cost of the radio. By hooking your computer up to a black box with nothing but an ON/OFF switch, you use something you already have for the interface and save a lot of money on the radio. The RX-320 would probably cost twice as much if it had all the standard dials and di
Re:SW is not Dead! (Yet) - remember rwanda? (Score:1)
Rewanda - A Historical Chronology [pbs.org]
Google search: rwanda genocide extremist radio [google.com]
Digital SW (Score:4, Informative)
Anyway, checkout the samples [drm.org], not bad for a signal that has travelled to and from the extreme of Europe.
Re:Digital SW (Score:2)
Newer PC-controlled receivers (Score:3, Informative)
Dan East
It's all been done...WinRadio (Score:2)
Re:It's all been done...WinRadio- PC Noise (Score:1)
LinRadio (Score:4, Informative)
Couple of good technical articles.. (Score:1)
New Ham / Interesting Article! (Score:2)
Re:New Ham / Interesting Article! (Score:2)
Glad to have you among the ranks! Shame on you for not mentioning that you wife's a ham, too! 5 WPM code is easy, and it opens up the whole world to you, literally.
Nice website, by the way.
73 de k4det
Re:New Ham / Interesting Article! (Score:1)
73 de kc8wvj
Forget computer-controlled radios, go SDR! (Score:5, Informative)
--zawada
Re:Forget computer-controlled radios, go SDR! (Score:2)
what i've never been able to figure out is the attraction, so you can listen to various forms of radio from everywhere, so what? is air traffic control really that interseting? make me understand why this is worth $500 and realize i am totally ignorant of anything related to any form of ham/shortwave...
Re:Forget computer-controlled radios, go SDR! (Score:1)
There's a whole world of things to listen to out there. Ships at sea, utility transmissions, weather data, radio FAX... I've mostly been into broadcast SW. I find it interesting to listen to news from various places around the world. Both the flavor of the local news and their spin on
What's Good on Shortwave? (Score:1)
Re:What's Good on Shortwave? (Score:2)
Re:What's Good on Shortwave? (Score:1, Informative)
One of the best ways to get started is the book "Passport To World Band Radio" with this book you can tune in to right frequency at the right time which is important. I could never get a station until I got this book. Highly recommended. [ http://www.passband.com [passband.com]]
The BBC World Service has some great programs and other stations for English programming include Deutsche Welle, Radio Nethe
Re:What's Good on Shortwave? (Score:2)
You just need to look a little harder. There is lots of Really Neat Stuff on shortwave. My favourites remain the BBC, Radio
Re:What's Good on Shortwave? (Score:2)
During the days of the Cold War, every country with a political axe to grind had English language transmissions to North America.
With the demise of the Evil Empire (and other changes - South Africa no longer has a NA English service) many of these stations folded up, cut their hours, or dropped their power.
The ones that are left have been dropping out, due to a perceived lack of interest in short wave by USAians and the cost sav
Clear Channel (Score:3, Funny)
Re:Clear Channel (Score:1)
Well I don't know if that would be any worse what we have now. Except for the VOA, and WWV time signals, just about the only SW stations broadcasting from the US right now are a bunch of evangelist Christian stations.
Doesn't present a very well-balanced view of America.
At least a bunch of Clear Channel owned music stations would giv
Bah. (Score:1)
RE: All the threads about SW radio Internet Router (Score:5, Informative)
However, if you use the UHF, VHF, and microwave bands. (WiFi btw is basicly just what we're already talking about on the microwave bands) then a lot more spectrum opens up. The problem with these bands is they do not skip the way the SW bands do so cannot cross long distances. Your maximum range is about 10% beyond the horizon. However, if you stratigicly placed routers/repeaters over a country, you might be able to give that entire country a wireless computer network, just don't do peer-to-peer filesharing or other high bandwidth tasks on it please. Interfearence could be partial overcome by using many, many different bands so that traffic could be spread out over 20-50 different frequencies or so.
73
KG4WWN
Shortwave Array (Score:1)
Re:Shortwave Array (Score:2)
Sometimes phased arrays are used for getting higher gain and directionality. These are usually beam type yagi antennas. For higher frequencies, the antennas may be side by side on a single boom, for lower (hf) frequencies, the beams may be stacked vertically, one above the other. Note that the effects serve for both receive and transmit.
Re:Shortwave Array (Score:1)
If not h
My favorite computer controlled short wave radio. (Score:1)
In any case, expect to pay $5000 and be a licences amateur radio operator to enjoy it. I just wanted to link to t
FIXED LINK. Sorry about that. (Score:1)
Day of the dead. (Score:3, Informative)
Two things that are certainly NOT dead: Shortwave and BSD. Visit the page at: DSP radio for LINUX on Intel platforms [nitehawk.com]
It's a beautifully documented, state of the art, software-defined, digital signal processor. It's downloadable and it's free! (Yeah, I know that Linux is not BSD, and vice versa. But this radio runs under both. Okay?)
Review Missed VoA: Voice of America (Score:2)
Remember waking up at nights to listen to brtish top 20 charts on BBC, and Billboard top 10 on VoA. VoA was hosted by Ray macdonald (if I remember cor
Transmit (Score:1)
Stand-alone _and_ PC-controlled? (Score:1)
I've done a quick search for this, but not found anything. And, since I've been out of the loop for so long, I don't even know what companies are respected and recommended. Any
Re:Stand-alone _and_ PC-controlled? (Score:1)
Depending on what you're trying to listen to in Africa, you could probably get by with a fairly cheap portable. The major broadcasters tend to send some pretty powerful signals in that d
and another cool thing you can do with this radio (Score:2)
Using Winamp and the Shoutcast plugin, I can stream AM broadcast programming over shoutcast and the internet. This is very nice for my sister and her boyfriend who are big area sports fans (Big City USA), but obviously can't listen to the games on radio (as they live in germany). I simply setup the radio during a game, and they can listen to their heart's content. Like i sai
Open-Source TEN_TEC Trasceiver (Score:2, Informative)
What about Linux though?? (Score:2)
I'd like to see about getting one of these cool radios and throw up an antenna but I refuse to use any windows stuff in my house. Does the company have a version of Linux??
Lightning, Computers, Morse Code (Score:1)
When lightning hits your antenna, you could lose your SW radio. Your computer, however, is (or should be) more expensive. Of course modem lines pose a sim
Give one a try... (Score:1)
Requires Real Audio to listen in. Plenty of links to established programing for those who don't know which frequencies to pick as well.
Re:Shortwave ?? It still exists ?? (Score:3, Interesting)
My favourite shortwave phenomenon was always the numbers stations [spynumbers.com]. Where else can you listen to real-life spy messages, even if there's not a hope in hell you'll ever be able to decode them?
As I recall there was always a ton of mysterious signals on shortwave - wierd humming stations, modem-ish tone stations (in the 70's)and all sorts of strange, intelligent-sounding clicks and pops. Shortwave is a peculiar little world.
Yes, shortwave is thriving (Score:4, Interesting)
The BBC World Service, Deutsche Welles and a host of other national services give a good world opinion on the state of affairs, which seems to contrast with local news during periods of heightened global tension.
Its also fun to listen to the angry broadcasts of small angry countries like Cuba and NK, although the hey-dey for this kind of rhetoric was the cold war.
Now whether or not a PC is the most effective way to listen to shortwave is debatable, but the value of shortwave is not. For $250-300 you can get an excellent portable shortwave radio that will entertain you far longer than the latest hot video card.
Re:Macintosh? Solutions! (Score:1, Informative)
Remember that Macs can run Linux as well. And another solution is to run VirtualPC-emulation for Windows.
And if those system ever hit mainstream, there will be native Mac solutions as well, but that's not likely.
Re:Macintosh? What's that? (Score:1)