AmateurRadio.com

OpenDNS is a free domain name server (DNS). Most of you will know what that is, but for those who don’t, a DNS is a server that converts web addresses like blog.g4ilo.com into numeric IP addresses like 123.234.345 so the web browser can find the right web site. Most people use the DNS provided by their internet service provider (ISP) and don’t think twice about it. However, the DNS provided by many ISPs is slow and unreliable. It was because of that that I started searching for a free alternative and discovered OpenDNS.

An added benefit of OpenDNS is that it provides content filtering. This can be a useful safeguard if you have children who use the computer as it can prevent them accessing various dubious sites. It can also protect you from visiting phishing sites – websites that pretend to be the login pages of various online banks or email services so they can steal your passwords. It does this by converting the addresses of known phishing sites to the IP address of a warning page instead. The web is a pretty dangerous place these days and any extra level of protection is a good thing as far as I am concerned.

However, this afternoon I tried to access a ham radio site at qsl.net, and was informed that this was a phishing site and had been blocked. In fact the whole of qsl.net has been blocked to users of OpenDNS. I have contacted them using the link provided to tell them that qsl.net is a free web host for ham radio hobby sites. I’m assuming, of course, that qsl.net hasn’t been blocked because it is hosting malware.

I’m not exactly a fan of Flash in websites but I think you’ll agree that that this example from the home page of the Dutch store HEMA is very amusing. When the page opens, don’t click on anything, just wait…

If you’ve used Google Maps then you have probably tried the Street View feature that lets you look around a place on the map as if you were actually there. Unless you are in Germany, that is. Germany remains the largest European country that is not covered by the Street View service. The German government has forced Google to offer an opt out service that allows people to request that their houses are blurred out of the pictures in the same way faces and vehicle registration plates are. Some privacy campaigners in Germany would prefer that appearing in Street View should be an opt-in feature.

Street View has been available as an option on the aprs.fi APRS tracking site for a few months now. It’s fun to virtually travel along with an APRS user and see what they see. But Street View has a serious use too. If you’re house hunting then it would be a great way to see whether you like the neighbourhood, for example. When Olga and I went to Prague last month the taxi driver from the airport wasn’t sure exactly where our rented apartment was but because I’d “visited” the area in Street View a few days earlier I recognized where we were and was able to direct him right to the door. (Incidentally the Czech government has also called a halt to further data collection in the Czech Republic pending talks with Google.)

I don’t know what people think they are achieving by insisting on being able to opt out of Street View. It shows nothing that you can’t see just by being there. What are they trying to hide? Anyone can take pictures of an area, upload them to the internet (without blurring anyone’s face or vehicle registration number) and link them in a way that anyone searching for pictures of that place will find them. All Google has done is go about it in a more methodical way. Are we going to have controls on publishing photos on the internet now?

The great thing about the internet is that you can find the answer to anything. You may not understand the answer, it may not even be the correct answer, but you can find it. And sometimes you will find out more than you were expecting.

Yesterday I happened to think “If I have a computer or smartphone with a GPS, can my position be accessed from its web browser?” A quick search of Google turned up the answer that yes, it could, in newer browsers that support HTML 5 like Firefox 3.6 and Google Chrome and the Android web browser. I even found some example code showing how to use it. I made a test page to try it out for myself. The results were a little unexpected.

First I tried it using my shack PC, which is a mini-tower with only a wired connection to my router. It told me that I was in Sheffield. This was actually not unexpected, as that is similar to the location I see when visiting some blogs that have a widget to show where visitors come from. I presume they, and the web browser, use geolocation by IP address if that is the only available method, and Sheffield is presumably the location of my broadband ISP’s data centre.

When I tried using my smartphone running Android I saw the GPS status icon flicker on for a couple of seconds and my page then reported my position as being in Broughton, a village a couple of miles west of here. I’m guessing that the GPS didn’t have time to get a good fix so I got a poor one, or else it is reporting the location of the cell the phone is connected to.

But the really surprising result was when I tried using my laptop. This doesn’t have a GPS and is connected using wi-fi to my router, so it has the same IP address on the web as the shack system. Yet my test page pinpointed my location as across the street over the back, only about 20 yards from my actual location. I tried my netbook as well and got more or less the same position . How the heck did it know where I am?

After a bit more Googling I discovered that this is done by triangulating your position using the names or SSIDs of the wi-fi access points your computer can receive. A firm called Skyhook has created a database of access points and their locations by driving around every street in every town and city in the US. There is also a site called Geomena.org that has an access point database created by ordinary individuals. You can even add to it by installing a client app in your iPhone or Android phone and going walkabout. Google has a database which it presumably created at the same time it drove around doing Street View mapping and snooping on people’s unsecured data. In Firefox you can see which wi-fi geolocation database is used by going to the address about:config (no http://) and examining the value of geo.wifi.uri. By default it’s Google’s. You can also disable browser geolocation by changing the value of geo.enabled.

I think the geolocation feature is pretty cool but I’m sure many privacy-obsessed types will be horrified by the thought that even without an actual GPS their position can be located to that kind of accuracy.

If you are interested in trying this for yourself then you can visit the Geolocation Test page that I created. If your browser supports geolocation (and you have Javascript turned on, which is necessary for the page to work) then you will be asked if you want to share your location with g4ilo.com. This is presumably a privacy thing, because if I wanted to I could log all the positions in a database. I don’t, and in any case you’re all hams so I can find out where you are from qrz.com, so hopefully you won’t have a problem with that. If you allow the site to see your position it will then display your latitude, longitude and Maidenhead locator and show the position on a map so you can easily see if it is accurate.

If you do try my test page I’d be interested to know, via comments, how accurate the position was and whether your computer had a GPS, wi-fi or you were using a smartphone. If you have a mobile wi-fi device, does it track your position as you move around? If the results are promising I might make a permanent page for determining your grid locator using geolocation.

Is it just my computer, or has Jeff KE9V’s blog site gone QRT? His last posting in the Blogger “Reading List” feed was to do with the controversy over the Ground Zero mosque, but when I click through the page has gone, as has his entire site except for one placeholder page. I don’t know what Jeff had to say on the subject or whether it had anything to do with his site now being down.

The unwillingness of many hams to chat or ragchew on the air is becoming a frequently raised topic on blogs and forums. One QRP blogger recently complained after one of his CQs received a “599 TU OM” type of reply.

It’s sad but, I think the disappearance of the ragchewer is inevitable. Thirty five years ago when I was first licensed, if I wanted advice on something I was doing I would call CQ and hope someone knowledgeable would reply. Much of what I learned about radio after getting my ticket I learned from on the air conversations. Today I would go on the internet where I can find out much more, much faster.

In the late 1980s I added my first modem to my home computer and discovered bulletin boards – the forerunner of today’s internet. There I could chat with fellow computer enthusiasts without any of the aggravations of QRM, QRN and QSB that afflicted ham radio communications. My ham radio usage fell right off to the extent that I eventually sold my gear and let my license lapse for several years.

Whilst playing with radio is fun, especially if you like building electronic things or are interested in propagation, the internet is a much better system for finding like-minded people to chat with and provides more reliable ways to communicate with them. We’re all guilty! Every mailing list or forum thread and every blog post with its follow-on comments is a conversation that once upon a time might have been conducted on the air. The internet has changed ham radio and there is nothing anyone can do about it.

That isn’t to say there is no point to ham radio any more. But the point is increasingly about how far (or where) your radio signals reach, not what you actually say. Contesting and award chasing with their “599 TU” exchanges are popular like never before. And there is lots of interest in modes like WSPR and QRSS beaconing that allow you to see how far your transmissions go without the bother of having to contact somebody and receive a report from them.

The art of on the air conversation is dying out. The reluctance of digital mode users to venture beyond sending their pre-prepared macros is one example of this. Making a ham radio contact no longer requires an exchange of personal information, you simply need to receive enough of someone’s signal for it to be identifiable as theirs. And digital modes have been developed that facilitate the exchange of just this minimum information.

The popularity of the JT65A mode on HF can be explained by the fact that it allows people to make “contacts” without having to speak or type anything, because the exchanges are all coded into the software. VHF enthusiasts now work each other using weak signal digital modes whilst they are in constant contact, not using radio, but via ON4KST Chat, an internet chat channel. When you need to keep in contact, it seems, radio is too unreliable. The same appears to be true for DX Cluster spots. How many people still receive them using packet radio?

The ham bands are becoming no more than a playground for those in which the unpredictable vagaries of propagation provide the key element that makes their activities a challenging and absorbing pastime. But as a serious communications medium, unless you’re half way up a mountain or in the middle of Africa where the internet and cellular networks aren’t available, radio is becoming somewhat redundant.

If you want to talk to somebody about your favourite ham radio topic why worry whether the propagation gods are feeling kind to you when you could just start a thread on Yahoo Groups or QRZ.com or go on Echolink?

The web is a great way to get information about subjects like ham radio that you might never find if you had to rely on books. Unfortunately it’s also a good way to get wrong or obsolete information. For example, people looking for advice on how to make their first contacts via amateur satellites will find many articles that explain in great detail how to work through satellites that have long been defunct – even on the Amsat website!

There are numerous websites that explain about SSIDs used for APRS. (An SSID is the numeric suffix to the call, for example G4ILO-7, which is used to distinguish an operator’s APRS devices and also to give an idea of what type of device it is.) They are all wrong! Bob Bruninga, WB4APR, the inventor and ultimate authority on APRS, released an updated set of recommendations on 9 June this year to provide more flexibility for current usage.

The new recommendations are:

-0 Your primary station, usually fixed and message capable.
-1 Additional station, digi, mobile, weather station etc.
-2 Additional station, digi, mobile, weather station etc.
-3 Additional station, digi, mobile, weather station etc.
-4 Additional station, digi, mobile, weather station etc.
-5 Network sources (smartphones etc.)
-6 Special activity, e.g. satellite operations, camping, 50MHz etc.
-7 Handheld radios and other human portables.
-8 Boats, RVs or second mobile.
-9 Primary mobile.
-10 Internet gateways, Echolink, Winlink, AVRS, APRN, etc.
-11 Balloons, aircraft, spacecraft, etc.
-12 APRStt, DTMF, RFID devices, trackers etc.
-13 Weather stations.
-14 Truckers or other full time drivers.
-15 Additional station, digi, mobile, weather station etc.

These are recommendations and not set in stone, but they are intended to help people know what type of device or application is being used, particularly in situations where someone doesn’t have a graphical map display and can’t see an icon.

Due to these recommendations I am now using G4ILO-5 for my Windows smartphone running APRSISCE. My VX-8GR remains G4ILO-7. My main 2m station is G4ILO-0 or just plain G4ILO, and my HF station is G4ILO-1.

Of course, this page could also become out of date in the future so I am including this link back to the original document in case Bob should make any further changes.