AmateurRadio.com

A tip o’ the cap and a smart salute to NS8R for making me aware of The American Legion Amateur Radio Club.

http://www.legion.org/hamradio

If you’re a US Armed Forces veteran and belong to the American Legion – please be sure to check it out.  It looks really, really nice.

Oh, and if you’re a veteran and a Legion member or VFW member, or not a member of any organization at all – thanks for your service!

On another note, QRP DXing can be a mixed bag.  Some days, when the band conditions are right, it can be like shooting fish in a barrel. Other days, when the bands and the sun are not very cooperative, it can be akin to having a root canal.  But either way, it’s fun. Hey, even trying for “the one that got away” is more fun than being at work!

But I really have to give credit to my brother and sister QRPers who go about it using SSB.  They have just that smidge more of patience and endurance than most of us. Sometimes, it seems like it just can’t be done – but here’s proof that it can.

Thanks, John K7HV for posting to YouTube.

72 de Larry W2LJ
QRP – When you care to send the very least!

Icom ID-51

Icom has demonstrated a prototype of its latest dual-band handheld transceiver – the ID-51A. (The European version will be the ID-51E.)

Covering 2m and 70cm, the ID-51 can also receive FM broadcasts and AM short wave radio. It supports D-Star (of course) as well as FM mode, and boasts a large 128×104 pixels display, the largest yet seen on an amateur radio handheld rig.

Like its smaller sibling the UHF-only ID-31, the ID-51A/E has a built-in GPS which can be used for track logging to a micro-SD card. The storage card can also be used to record incoming and outgoing voice traffic. Very useful – not!

Disappointingly though not unexpectedly, this new Icom does not support APRS, though it presumably supports D-Star’s rather lame version, D-PRS.

The ID-51 is being billed as the most technically advanced handheld, though it looks like you will be paying a lot for features – like the GPS and short wave receiver – for which most hams will have little use. I doubt that the large display – never mind the GPS – will do much to extend battery life, though Icom will offer an extended battery pack (at the usual inflated Icom prices no doubt.) However it is nice to see a manufacturer breaking the mould for HT user interfaces which have changed little for the last 20 years.

Introduction:

• The 10th Annual Ohio LinuxFest will be held September 28-30, 2012, at the Greater Columbus Convention Center in downtown Columbus, Ohio.
• Another riveting episode even though Richard has been attempting unassisted human flight. (We’re all worried about the consequences should he succeed.)
• Our special guest tonight is Rob Hawkins from the mintCast.

Announcements:

• If you’re a subscriber to LHS, you can access the Etherpad, download episodes without music, and you’ll soon have the option of episodes in .flac format.
• Remember the Black Sparrow Media app for iPhones, iPads and Android devices. It’s free! With it, you can listen to all of the podcasts in the Black Sparrow Media group.
• Please consider donating to the podcast! Click the Donate link.
• Check out the KF8GR Linux Ham Home Page. Even though it hasn’t been updated in several years, much of the information is still relevant.
• Richards suggests a Linux/Amateur Radio “best on the web” award. Your web site should have at least one page devoted to Linux or Linux and Ham Radio. Send your nominations to [email protected]. If accepted, the LHS hosts will provide an award graphic for your website, and a link to your site from LHS.
• Richard also found this TechNewsWorld article “Why Ham Radio Is Still Handy”.

Topics:

• Interview with Rob Hawkins of the mintCast podcast.
• Rob describes his move from Ontario, Canada to Houston, TX, and drops this bombshell: “Texas is nothing like Ontario!” Rob is an engineer by training. His first computer encounter was an IBM 370 mainframe and Fortran at the University of Waterloo, Ontario. His first personal computer was a Radio Shack Color Computer and his first Linux exposure was with Slackware and several dozen floppy disks. He’s been using Linux Mint since version 8.
• Rob goes on to describe how he came to the mintCast.
• Our hosts and Rob then move on to various technology topics:
  • The current state of Linux Mint.
  • UEFI – Unified Extensible Firmware Interface.
  • Software patents.
  • Windows 8 and possible opportunities for Linux.

Contact Info:

• Contact Richard at [email protected], Russ at [email protected], or both at the same time at [email protected].
• 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:

• “The Napalm Theory” by Ophyra, from the album Post Mortem, courtesy of Jamendo.
• “Velvet Embracer” by Diablo Swing Orchestra, from the album The Butcher’s Ballroom, courtesy of Jamendo.

The Nagoya VHF/UHF antennas made in China and available from sellers like 409Shop are popular and cheap, but I think they leave a lot to be desired in the quality control department.

A couple of years ago I bought a Nagoya NA-666 with a regular male SMA connector for use with my Kenwood and Yaesu rigs. I was impressed with the performance of this antenna, and with the fact that it achieved a true 1:1 SWR at bang on 145MHz.

So when I ordered another antenna of the same model but with a BNC connector to work with all my HTs (which have now all been fitted, where needed, with SMA to BNC adapters) I was surprised to find that its performance was a disappointment.

I am well aware of the existence of fake antennas on eBay and have bought more than my fair share of them, but this looked to all intents and purposes to be a genuine Nagoya (silver on black label on the base and a serial numbered Nagoya hologram on the pack.) It had been purchased from 409Shop, a reputable seller. However, when tested on my RigExpert AA-200 antenna analyzer the nice sharp SWR curve dipped to a minimum at 135MHz – 10MHz too low. The SWR at 145MHz was off the scale. Ho hum.

As any ham knows, if an antenna tunes too low in frequency the solution is to cut bits off. After a bit of a struggle the rubber end cap came off and I gingerly pruned about a tenth of an inch . The antenna analyzer showed the minimum SWR point had moved up 1MHz. So I carried on with the cycle of cut, test, cut, test until I had achieved a much more reasonable SWR at 145MHz.

Final SWR curve of the shortened antenna

As I approached 145MHz the antenna was now quite noticeably shorter and I was concerned that I may have passed the point at which the improvement due to a better match was counteracted by the reduced size of the radiating element. I may have passed that point but it is very difficult to make reliable and repeatable field strength measurements. Therefore I didn’t make the final cut which would have brought the SWR (shown above) to 1.0:1 at exactly 145MHz.

Field strength measurements and on-air tests led me to the conclusion that the 7-inch shortened NA-666 performed 2-3dB better than my 8.5 inch long NA-701. It beat all the stock rubber ducks by another 2 or 3 dB. The only antennas that outperformed it were a quarter wave telescopic (19 in long) an even longer Nagoya NA-767, a nicely made but unbranded “RH-770” and a “Diamond” RH-205 5/8 wave telescopic, all of which are really too long and cumbersome to use with a small radio like the Baofeng.

Using the shortened NA-666 I have had solid simplex contacts with 5 and 9 reports over distances of several miles and can even access a repeater 50 miles away from inside the shack. So I’m pretty pleased with the result.

There are three excellent ham radio activities going on this coming weekend. Check these out and see if there is an activity that catches your interest. This is written for people in Colorado but items #1 and #3 are North American wide.

1. ARRL September VHF QSO Party – noon MDT on Saturday until 9 PM MDT on Sunday    http://www.arrl.org/september-vhf
2. Colorado FM Sprint – a mini version of the September VHF QSO Party,
   using FM only on these bands: 146 MHz, 222 MHz and 440 MHz
   Saturday from noon to 7 PM MDT
   http://www.qsl.net/k0yb/Colorado_FM_Sprint.html
   Suggested frequencies: 146.58, 146.55, 223.5, 446.000, 446.100 MHz FM simplex
3. North American Summits On The Air (SOTA) Weekend
   SOTA activations all over North America
   http://na-sota.org/NASOTA_Weekend.html
   Go here to see announced summit activations: http://www.sotawatch.org/
   VHF contacts are usually on 146.52 MHz
   (Note: this frequency is NOT allowed for contacts in the
   Sept VHF QSO Party and Colorado FM Sprint)
   HF contacts are on frequencies listed on sotawatch.org

Wow, lots of stuff to choose from!

At the very least, I’d suggest getting on the air Saturday afternoon to see if you can work some of the VHF contest stations. They are likely to be some mountaintop SOTA stations active at that time, too. Some of these folks may try to work the VHF contests AND do the SOTA thing on the same expedition.

73, Bob K0NR