Archive for the 'ham news' Category

Amateur Radio Shoes

admin Popularity: 11% [?] August 26th, 2007

GPS Packet Radio ShoesI don’t know how many people actually use Google Alerts (I am sure it is millions), but for those who don’t, you can find some real interesting and sometimes strange stuff on your topics of interest, along with many other beneficial aspects of the alert system. All in all I probably have more than 50 google alerts to keep up to date with indexed items like my blog, new trends in amateur radio, my name search and so on.

The information is much differently than a reader, like Google Reader, but since it is an email with a little blurb on the new found alert, it is a similar concept, except in email form. Instead of the user finding a site of interest and adding the rss feed to their rss reader, they find a topic of interest, then have Google go get it (with various optional settings).

You just type in the search term you want, just like when you Google something, (including special character searches, which I love) and whenever Google’s spider indexes the term, it finds a match, and boom, you have an alert.

Google Screen Shot of GPS Alert Shoes

Today, this was the title of the alert for my heading “amateur radio” blog (see screen shot above). I didn’t really want to put the text of the alert in this post, but you get the idea from the screen shot. The article itself was detail oriented (approved for all audiences), but the quote from Wired read as:

The GPS unit uses APRS (Automatic Packet Reporting System) a system which uses amateur radio frequencies to send data, which, ironically, was first developed at the United States Naval Academy (all the nice girls love a sailor).

The shoes are a concept right now, albeit a working one, and can be tried out at the Gallery Aferro in Newark, New Jersey in September (15th, 22nd, and 29th). Mens and women’s sizes will be available, and orders will be taken for custom builds.

information and photo above of shoe: http://blog.wired.com/gadgets/2007/08/gps-alarm-shoes.html

I would like to know a little more about the technology that went into the shoes, like how they are able to transmit without using a call sign without being a licensed radio operator (I assume that a shoe can not be a licensed amateur radio operator). There are FCC statements for frequency use that allows radio controlled planes, RC cars, and similarly controlled machines, to operate on ham radio frequencies without a license, but most will still post their call sign on the side of the plane if they have one. I don’t know that much about RF tags that retailers use on everything, but I am fairly certain they don’t use amateur radio frequencies.

Of course, it says it is using APRS (Automatic Position Reporting System), a system developed by WB4APR which, according to his website, “uses amateur radio to transmit position reports, weather reports, and messages between users”, and all those users are amateur radio operators (as far as I can tell anyway).

I am sure the inventors of these shoes are aware of all the frequency implications and how it can and can’t be used, and I am by no means any expert on the subject at all, I am just interested, as a licensed amateur radio operator, how the technology (and shoes) move from mainstream over to amateur radio use.

For those who know a lot more about packet radio (and APRS) than I do, which wouldn’t be hard, I would love to hear your comments. 73, KI4WLR

Popularity: 11% [?]

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Hurricane Dean

admin Popularity: 10% [?] August 17th, 2007

Hurricane Dean 5 Day Track from NOAAHurricane Dean has now been upgraded to a category 4 hurricane and is headed for the Gulf of Mexico. Several amateur radio nets have now been activated, and all the net information can be found at http://www.hwn.org/

Dean looks like it will make landfall around Cozumel and then pass on into the gulf where it should strengthen again before hitting landfall somewhere around Brownsville, TX, according to the more recent forecasts from NOAA and the National Weather Service.

Timing of this storm is interesting for the amateur radio crowd since this is the weekend for the large ARRL National Convention in Huntsville, AL. A large number of radio operators go to the Huntsville hamfest each year but this year a larger number will be making the trip because ARRL’s convention going on at the same time. Many hams I know in the Alabama gulf coast have already left the gulf area to go to Huntsville, but all will be keeping an eye on Dean this weekend from up north. 73, KI4WLR

Popularity: 10% [?]

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Live Free or Die Hard Radios

admin Popularity: 10% [?] July 30th, 2007

144.300 mhz ICOMWe went to see Bruce Willis’ new movie this weekend, Live Free or Die Hard and the amount of general radio coverage was very interesting in the movie. Apparently there is a large amount of radio type coverage in all the movies, being a new ham I just hadn’t looked that closely before. A few observations from the latest:

There were several “radio” shots throughout the movie, because of the nature of the movie I guess (end of the modern telecommunications world etc.), but most were factually incorrect and some were just facts.

ICOM did have a presence in the movie, real or not, they were ICOMish looking radio’s and a huge number of HT’s were used by everyone, but they were often referred to as CB’s regardless of the radio used. Not to surprising as I guess everyone that isn’t familiar with ham radio thinks every radio is a CB radio.

Live Free or Die HardAt one point Bruce Willis’ character is talking to Warlock, a cyber hack, and he points to (what is called a CB radio) a radio with a taped sticker on it that says Frequency 66.6, and is later used when Willis is in a 18-wheeler type truck. The radio he used to make a call on 66.6 frequency was not a CB, and the radio station he was calling was not either.

It did look much like a modern HF or all band ICOM. Of course the frequency 66.6000 is not a CB frequency. According to the FCC, it is a public TV broadcast frequency (54.000-72.000 - Broadcast TV (channels 2-4) (6 MHz steps - FMw), and the Citizens Band frequency range is 26.965-27.405 (the 11 meter band).

Another observation was the radio in the NYPD unmarked cruiser was set at 144.330 mhz. This frequency is obviously a 2 meter ham band frequency, which falls in the sub-plan of 144.300-144.500, assigned to new OSCAR subband (the satellite repeater links). I might just have to go watch the others again now. 73, KI4WLR

Popularity: 10% [?]

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