Category: Show Notes

Show Notes #085

Posted on by Russ Woodman

Introduction:

  • "You know it's summer in Texas, because all the truck tires shed their winter coats."
  • This episode, an interview with David Rowe, VK5DGR.

Topics:

  • Our hosts conduct a lively conversation with David Rowe, VK5DGR, from Adelaide, South Australia.
  • David is the author of Codec 2,, an open source speech codec designed for communications quality speech.
  • You can find more information about David and his project on his blog.
  • Powerpoint presentations and Youtube videos of how Codec 2 works are available on his Codec 2 blog page.
  • You can see David's presentation of Codec2 at linux.conf.au here.
  • David then describes the Mesh Potato project, an open hardware product designed specifically to build telephone networks without infrastructure like cell phone towers or land lines.
  • The Mesh Potato is available for purchase.

Contact Info:

  • Contact Richard at kb5jbv@gmail.com, Russ at k5tux@lhspodcast.info, or both at the same time at info@lhspodcast.info.
  • Listen to the live stream every other Tuesday at 8:00pm Central time. Check the LHS web site for dates.
  • Leave us a voice mail at 1-909-LHS-SHOW (1-909-547-7469), or record an introduction to the podcast.
  • Sign up for the LHS mailing list.
  • Sign up for the MAGNetcon mailing list.
  • LHS merchandise is available at the Merch link on Web site. Check out the Badgerwear or buy one of the other LHS-branded items at PrintFection.com/lhs or Cafe Press. Thanks!
  • Thanks to Dave from Gamma Leonis for the theme music.

Music:

  • None.

Podcast: Play in new window | Download

Show Notes #084

Posted on by Russ Woodman

Introduction:

  • No music this time; just one hour jam-packed with LHS goodness!

Announcements:

  • Remember to sign up for the following LHS services:
    • The LHS SubReddit
    • The LHS Mailing List
    • The LHS Mobile app. Follow our updates via the mobile applications available for iPod, iPhone, iPad and Android devices.
    • Be an LHS Ambassador! Please join our Ambassador program. The event calendar has expanded quite a bit and we need your help. These events are now world-wide, so we could use some help outside the US as well as all over the country from California to Maine.
  • YFKtest: Yes, there really does seem to be a problem. It's been confirmed by John, EI7IG, that the program does not log contacts for the ARRL Field Day contest. Other contests work fine. Russ plans on emailing the developer, DJ1YFK, with these observations.
  • From the "Yes, It's an Antenna" File: Multi-band HF dipole made from horse fencing.
  • Pulling a Lunduke: Holding Source Code Hostage. Our hosts discuss this blog post by Tom Nardi about Bryan Lunduke's recent move to open source his software. Bryan is one of the hosts of The Linux Action Show.

Topics:

  • Software Defined Radio (SDR)
    • A common topic Russ encountered at Dayton was about the available Linux options for software defined radios.
    • GNU Radio Project
      • Version 3.6.0 released in early May, 2012.
      • Version 3.2.2 is in the Debian Sid repository.
      • The latest version can be retrieved with git. (Install git with the command "apt-get install git".) To download the software, issue the command "git clone git://gnuradio.org/gnuradio".
      • Build instructions are available for most of the major Linux distributions.
    • SDR Hardware
      • Ettus USRP series works with the GNU Radio Project software. There are various models ranging in price from $700 to $2000, depending on the frequency range and options. Various modules allow receive and/or transmit on bands from 30kHz to 5.9GHz. Unfortunately, power output appears to be just 50-200mW, depending on the bands provided by the transmitter daughter board chosen.
      • Funcube Dongle costs £128 (~$200) and is a receiver only. The Funcube Dongle is a "radio receiver designed to allow anyone to try their hand at reception of satellites like FUNcube". It covers 51.5MHz - 1.7GHz, less the region from 1.1GHz to 1.2GHz.
      • Perseus SDR costs $1000 and is also receive-only. It receives 10kHz to 40MHz.
      • SoftRock SDR is a kit available in various models from $20 to $90. Most are receive-only, but the Ensemble is a 1W HF transceiver. Some models are unavailable at the moment. The SoftRock RXTX Ensemble Transceiver Kit will allow you to build a 1W transceiver for one of the following bands or band groups: 160m, 80m/40m, 30m/20m/17m, or 15m/12m/10m.
      • RTL-SDR Devices range in price from $20 to $200 and are receive-only. More on the RTL-SDR project in an upcoming episode.

Feedback:

  • Stewart, VA3PID, wrote to say that Russ was the first person, possibly ever, to correctly place his Scottish accent at Hamvention. He also remarked (in reference to a discussion in episode 71) that Chirp has come a long way; it can now program his Yaesu FT-857D!
  • Jonas recently re-discovered LHS and expressed his appreciation for the show. Thanks, Jonas!
  • Stefano, IZ3NVR/KD2BGM, asks for more help getting so2sdr built on his Linux machine. Russ suggests installing the compiler with "apt-get install g++ build-essential", installing Qt and several other packages as described in Episode 83, then try building the so2sdr program again.
  • Lastly, David Dominicki left a mostly unintelligible comment in response to Episode 78. Um, thanks... we think.

Contact Info:

  • Contact Richard at kb5jbv@gmail.com, Russ at k5tux@lhspodcast.info, or both at the same time at info@lhspodcast.info.
  • Listen to the live stream every other Tuesday at 8:00pm Central time. Check the LHS web site for dates.
  • Leave us a voice mail at 1-909-LHS-SHOW (1-909-547-7469), or record an introduction to the podcast.
  • Sign up for the LHS mailing list.
  • Sign up for the MAGNetcon mailing list.
  • LHS merchandise is available at the Merch link on Web site. Check out the Badgerwear or buy one of the other LHS-branded items at PrintFection.com/lhs or Cafe Press. Thanks!
  • Thanks to Dave from Gamma Leonis for the theme music.

Music:

  • None.

Show Notes #083

Posted on by Russ Woodman

Introduction:

  • Back from Dayton and ready to go.

Topics:

  • Dayton Hamvention 2012
    • LHS had the same booth as last year at North Hall #131. Estimated attendance was 25,000 individuals. Russ recounts the experience. Thanks to Matt, KC8BEW, who stopped by and helped out at the booth. The LowSWR podcasters stopped by, too.
  • FCC Dismisses Texas Ham’s Fourth Petition, Calls it "Repetitive"
    • Our hosts discuss.
  • Contest logging for Linux.
    • Several people at Hamvention asked about contest logging software for Linux, but Russ was at a loss for a recommendation. Upon his return, he discovered...
    • SO2SDR Contest Logging Software
    • Stefano, IZ3NVR/KD2BGM was trying to get so2sdr to work under Linux Mint and while it would compile, it did not run, so Russ set about trying to get it going.
    • It's not packaged for Debian or Fedora, so it must be built from source, available at the link above.
    • The program is written in Qt, so it can be run on devices which support that environment, including Linux and Windows. Of course, Qt must be installed in order to compile so2sdr.
    • Russ also had to install the following packages on his Linux Mint machine: portaudio19-dev (NOT libportaudio-dev; apparently, libportaudio-dev is too old), fftw3 and fftw3-dev
    • The compilation procedure consists of: 
                    qmake
              make
              sudo make install
    • so2sdr compiled and ran fine. It did complain that it wanted a parallel port for switching between radios, but you can ignore that if you don't need to do that.
    • Russ gives an overview of the features and capabilities.
    • There are a few drawbacks:
      • An apparent lack of SSB support? It seems to be CW-only.
      • Frequency input checking is broken.
      • Keystrokes are not intuitive, but are well-documented.
    • However, the built-in help file is quite useful.

Feedback:

  • E-mail from Larry, KG4Q, extolling fldigi and JT65-HF. He wishes there was a version of JT65-HF for Linux. Well, Larry, there is! You can download the source here. Also, WSJT does JT65, too.
  • Chris, K4FH, caught up with Russ at Hamvention and talked about his Linux in the Ham Shack presentation. He managed to put together a fine bunch of slides completely without our help. Sorry, Chris!

Contact Info:

  • Contact Richard at kb5jbv@gmail.com, Russ at k5tux@lhspodcast.info, or both at the same time at info@lhspodcast.info.
  • Listen to the live stream every other Tuesday at 8:00pm Central time. Check the LHS web site for dates.
  • Leave us a voice mail at 1-909-LHS-SHOW (1-909-547-7469), or record an introduction to the podcast.
  • Sign up for the LHS mailing list.
  • Sign up for the MAGNetcon mailing list.
  • LHS merchandise is available at the Merch link on Web site. Check out the Badgerwear or buy one of the other LHS-branded items at PrintFection.com/lhs or Cafe Press. Thanks!
  • Thanks to Dave from Gamma Leonis for the theme music.

Music:

Show Notes #082

Posted on by Russ Woodman

Introduction:

Announcements:

  • The Black Sparrow Media Mobile App for iPhone/iPad and Android has been updated. You can now listen to all of the old episodes, as well as new ones, via the app. wAVEgUIDES episodes are now included, as well. All streaming content is now available for iPad/iPhone. Please download and enjoy. It's at the Google Play marketplace, as well as via the Black Sparrow Media website, and it's still free!
  • The LHS Hamvention fund drive was a success! LHS will be at Dayton Hamvention 2012, May 18-20, in the North Hall of the Hara Arena in booth 131, the same place as last year.
  • Russ fixed a website bug that may have been causing some visitors to see the Black Sparrow Media site when surfing to LHS. Thanks to John, EI7IG, for pointing it out.
  • Please sign up for the LHS mailing list at https://lists.blacksparrowmedia.net/mailman/listinfo.
  • Please join the LHS subreddit and contribute show topic ideas, news of interest to our listeners, or just about anything else.
  • Please tell your friends about the show.

Topics:

  • Stan Horzepa, WA1LOU, in his recent Surfin' column on the ARRL website, recommends open source Apache OpenOffice and the desktop publishing software Scribus. Note, LibreOffice is a fork of OpenOffice and is also quite functional. Both offer word processing, spreadsheets, database and presentations. Scribus may have a steep learning curve, but it's a very powerful program. Easy tasks are easy to accomplish. Complex projects may take more effort to learn. Also note that many open source programs, like OpenOffice, Libre Office and Scribus, are available for Windows, OS X, as well as Linux.
  • Take a look at the ham radio section at Linux Journal which also has links to their Ham Shack forum.
  • Richard discovered several open source ham radio applications at Sourceforge: ircDDB_gateway, CQiNET, phppredict, contest loggers, fldigi, paclink-unix, OpenMOR, software for SDR radios, Ham Radio Net Logger, and more. So, don't just look in your distributions repositories for applications. You may have to compile the programs from SourceForge yourself, but it may be worth the trouble.
  • Finally, a reminder to visit KE2YK's Random Oscillations website.
  • An overview of ham radio apps for Android phones, available at the Android market, aka Google Play:
    • Morse Code apps:
      • Morse Decoder ($4.99)
      • Morse Code Reader (Free)
      • Morse Trainer Lite (Free)
      • Morse Trainer ($2.99)
      • Morse Code Trainer (Free)
      • Morse Code Keyboard (Free)
      • Morse Code Teacher ($3.99)
    • QSO Logging:
      • Amateur Radio Call Log (Free)
      • HamLog ($0.99)
      • Hamroid Free (Free)
      • Hamroid ($6.53)
    • Miscellaneous:
      • QSY (Free)
      • DroidPSK ($4.99)
      • DXCluster ($2.49)
      • DTMF ($2.49)
      • Echolink (Free)
    • A few more from Bill:
      • APRS Viewer (Free)
      • Ham Radio Tools (Free)
      • Who Is Calling Me? (Free)

Feedback:

  • Ronny, K4RJJ, regrets that he won't be able to act as the LHS ambassador at the Knoxville hamfest. If you'd like to be our representative at the Knoxville, or any other event, please contact us via the Ambassador link on the website.
  • Roy, KK4ATD, reiterates how much fun it is to be an LHS ambassador.
  • Chris, K4FH, says he offers a presentation at club meetings he calls Linux in the Ham Shack. He's hoping Richard or Russ has some material they can share.

Contact Info:

  • Contact Richard at kb5jbv@gmail.com, Russ at k5tux@lhspodcast.info, or both at the same time at info@lhspodcast.info.
  • Listen to the live stream every other Tuesday at 8:00pm Central time. Check the LHS web site for dates.
  • Leave us a voice mail at 1-909-LHS-SHOW (1-909-547-7469), or record an introduction to the podcast.
  • Sign up for the LHS mailing list.
  • Sign up for the MAGNetcon mailing list.
  • LHS merchandise is available at the Merch link on Web site. Check out the Badgerwear or buy one of the other LHS-branded items at PrintFection.com/lhs or Cafe Press. Thanks!
  • Thanks to Dave from Gamma Leonis for the theme music.

Music:

  • "Gunpowder Chant" by Diablo Swing Orchestra from the album "The Butcher's Ballroom," courtesy of Jamendo.
  • "L.E.O." by Oleg Serkov from the album "Epoch Symbol," courtesy of Jamendo.