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Welcome to Ham Radio Data Center, free diy schematics and datasheets

ISS Commander Mike Fincke KE5AIT talks with 'Marconi' school

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On Wednesday, 25 February 2009 at 07:50 UTC, 'Marconi' School, Casamassima, Italy, established a direct contact with US astronaut Mike Fincke KE5AIT on board the International Space Station. The school's Amateur Radio station made the contact

Read more: Southgate Amateur Radio Club RSS Feed


Ham Radio Fan Brian Wood, Call Sign WODZ, Opens Loveland Shop:

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Ham radio enthusiast Brian Wood dials in on his kit ham radio for a clear frequency. "CQ, this is WODZ calling CQ and standing by," he said in his new Loveland business, Valley Ham Shack. CQ is a general call meaning "I'm here," Wood said. Wood likes that he can send his voice out anywhere in the world by bouncing a wave off the ionosphere. "I can create my own radio waves and put them out there. To me, that's magic," he said. Wood, 57, hopes to share his passion with others. He opened Valley Ham Shack, 4321 W. Eisenhower Blvd., to give hams a place to stop for amateur radio equipment and supplies in the retail side of his business, and electronic kits on the manufacturing side, DZKit. Wood named his store Valley Ham Shack to pay tribute to his favorite supply store in his hometown of Phoenix that has since gone out of business. The name DZKit for his kit ham radio equipment also comes from another of Wood's favorites. Wood built a shortwave radio in 1966 when he was 14, using a Heathkit sold by Heath Co., a kit manufacturer that went out of business in the early 1990s. Wood echoed the name in his own kits, calling them DZKit.

Read more: eHam.net News


google talk voice chat on GNU/Linux

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Since this year March, I had been a heavy user of VoIP. I had been trying various options, asking other users on which service works best and so on. If not for VoIP, I would have been spending massive amount of money on Telephone to call home. One of the hard requrement was that it should run on GNU/Linux and should be Free (as in Freedom). But after trying out afew programs, I decided to relax that condition and decided to be a bit more pragmatic, but this requirement was always in the back of my mind. I had been mainly using Google Talk and occassionally Skype. I like the voice quality provided by Google Talk very much and the simplicity of their client program. The only bad part had been that it works only on Windows. I had to boot into Windows (which came pre-installed) on my laptop. Not anymore..

Google released the library called libjingle. I (together with my friend Anoop) was one of the first to try it out way back in 2006 if I remember - in vain. But last week I started looking into libjingle again. The inspiration came from this page and after afew late night hacking, it all works and this post will enable the reader equipped with a GNU/Linux machine to do it too. From now on, I am going (if time permits) to maintain a branch of libjingle and hope to release updated versions and also integrate it with a simple chat client. Those are for later.

0. Download the tarball. All the required changes to get libjingle to compile and work, is in this tarball.

1. Install SSL, ALSA libraries, Speex development files (i.e. libssl-dev, libasound2-dev, libspeex-dev). Needless to say, you need to have a working toochain setup. If not install gcc 4.x and its cousins.

2. libjingle 0.4.0 specifically depends on ortp 0.7.1. This will change in future, one of the things in my list is to make it work on the current latest version of ortp. ortp-0.7.1 is included in the above tarball. Do:

./configure && make && make install

This should install ortp libraries and header files into /usr/local.

3. Install iLBC libraries. Do:

$ cd msilbc-2.0.0

$ tar zxvf ilbc-rfc3951.tar.gz

$ cd ilbc-rfc3951

$ ./configure && make

$ sudo make install

iLBC is a royalty free codec, supposedly. But the version of code which is included in the above tarball is not really Free as in Freedom. One can use it only for non-commercial personal use. The specification are however, freely available, for anyone to implement a Free version. Any volunteers?

4. Go into libjingle-0.4.0 directory. Do:

./configure --with-speex=/usr --with-ilbc=/usr/local

After afew minutes of compilation, you will have the library and the programs in the example directories built.

5. Go to talk/examples/call. Run:


Alternatively, you can do a make install and just invoke call. call -d spits out some of the xmpp traces and debug information which was very valuable in debugging certain stuff.

It will ask you your JID. Give the full gmail ID (for eg: This e-mail address is being protected from spambots. You need JavaScript enabled to view it ) and give the password. I think the rest of the things are self-explanatory. It has a very simple command system. Type roster to see who is online or away. Use ‘call’ to call someone. Once you are in a call, it gives you another set of commands to hangup or mute/unmute calls.

6. There are afew issues with the program and occassional crashes. We will fix them on the way.

7. Please report success, problems and fixes to my email ID.

8. I have started maintaining my own svn repository of this code with the aim of improving it a bit. Contributors are welcome. I will publish the repository when I have something to show. One of my goals with libjingle is to do remote amateur radio operation. i.e. Control, recieve and transmit the radio sitting at your house connected to a computer and a broadband connection from anywhere in the world. What has been accomplished is just a baby step.

Surprisingly, I found in the initial xmpp capability exchanges that the latest windows build of google chat client is not using speex. It uses a bunch of propreitary codecs which is not supported by the above code, so it switches to the PCM/U at 8kHz sampling rate. [Update: Looks like I was wrong. Speex seem to be well supported. Sorry for misinformation.]

A big thanks to Google to publish libjingle as free software. The libjingle documentation is also a great piece of work. It will be a shame if no one used it to the maximum.

Read more: VU3RDD Station Log


Nec New Atom Powered Netbook the LaVie Light Lui Mobile

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Our new LaVie Light Lui Mobile from Nec is a Netbook powered by an Atom N280 at 1. 66GHz, has 1GB of RAM, 160GB of HDD, a 10. 1 LCD with a 1024x600 resolution, a 1.

Read more: New from Electronics Infoline


Hams prepare for Swine Flu pandemic

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Ham radio operators involved in emergency communications are making ready in case they are needed if the Swine Flu hits their area

Read more: Southgate Amateur Radio Club RSS Feed


Discovery 'go' for August 25 launch

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NASA has completed a two-day review of space shuttle Discovery's readiness for flight and selected Aug. 25 as the official launch date for the STS-128 mission to the International Space Station

Read more: Southgate Amateur Radio Club RSS Feed


bit-tech vs. the Antec 900

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Here at bit-tech we like to think of ourselves as connoisseurs of cases, the site’s modding heritage only adding to our cultured palette for all that is aluminium and shiny. Even in our busy offices, the excitement of unboxing of a newly arrived chassis is always something that gets people up from their desks to come and have a look.

We make no excuses for our preference for smooth, stylish lines in case design over industrial or military looks, and to us cooling performance isn’t everything – what’s the point of strapping dozens of high RPM cooling fans into a case when the noise it makes infuriates anyone within a twenty foot radius? Good design needs to reach a compromise.

Read more: bit-tech.net Feed


Zune Software for Phone Codenamed ???Pink???: Zune Phone or Nvidia Tegra Smartphone?

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Heres the skinny. Microsoft is tapping ad agencies for a new ad campaign for a product known only as Pink. The new campaign needs fresh ideas, says Microsoft and of course a few agencies, including McCann Erickson, which currently is the agency of choice at Microsoft.

Read more: New from Electronics Infoline


K5D official update for EU

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With just under two weeks to go, the Desecheo Island DXpedition team would once again like to emphasis how much work and effort has gone in to securing an almost perfect take-off to EU

Read more: Southgate Amateur Radio Club RSS Feed


Reminder: Contest Closes Tomorrow

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Just a quick reminder that our group of robots contest ends tomorrow at around midnight PST. Its by no means too late to enter; as long as you can come up with the funniest and/or best collective noun for a group of robots, youve got as much of a shot as anyone else at one of our fabulous prizes, which include weRobot t-shirts from Chop Shop, a WowWee TriBot, and a VEXplorer kit from Trossen Robotics.

Read more: New from Electronics Infoline


Mod of the Month - October 2009

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It's that time again. We've got six new mods to show you plucked straight from our thriving modding forums. Read, drool then vote on the one you'd like to win October's Mod of the Month

Read more: bit-tech.net Feed


Coregas New Four Bay Enclosure, Renamed the Hotway ProBox HFS2-SU2S2

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Yesterday Corega Japan announced their shiny CG-HDC4U3000 four bay enclosure that supports up to 4 2TB HDD for a total of 8TB of space (RAID0) thats connected to a PC via USB or eSATA (full speed) Nice thing indeed, but not very new.

Read more: New from Electronics Infoline


HamCon Colorado 2009:

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The HamCon Colorado 2009 committee would be grateful if you would forward this to your club members, and other hams and non-yet-hams that might be interested. After 18 months of planning and preparation, HamCon Colorado 2009, the ARRL Rocky Mountain Division Convention is almost upon us! The big event will happen May 29-31, 2009 in gorgeous Estes Park, CO. Many of you are already registered and have your accommodations booked. If you've not already made your HamCon Colorado 2009 reservation, or your hotel room reservation, time is running out for your best opportunities!

Read more: eHam.net News


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