AmateurRadio.com

Here’s another update of interesting important stuff spewing forth from the internet.

The Ham Hijinks crew continues to pound out some provocative ham radio reporting.  I can really relate to this story: Man Climbs Tower, Won’t Come Down Until Family Leaves. It was great to hear about this breakthrough: World Issues Solved On Local 2m Repeater. This one is destined to be a Christmas classic: Ham Op Gets CB Radio Christmas Gift Again  Warning: Do not take these guys seriously.

The HamRadioSchool.com team has been busy as well. Check out Stu’s article: Introduction to UHF/VHF FM Repeaters and my article: Practical Signal Reports.

You may have heard about the ARRL petition (FCC RM-11708) to modernize how Part 97 regulates the bandwidth of digital signals.  I’ve reviewed the proceeding and filed brief comments in favor of it. As I read through the filed comments, I found that some hams think this rule change is a threat to everything good in ham radio. I don’t know where they get this idea and I wonder if they’ve actually read the petition before commenting. For more on this, see: ARRL’s “Symbol Rate” Petition Nears Top of FCC’s “Most Active Proceedings” List .

Sverre LA3ZA posted a nice piece comparing the low cost Baofeng handheld radios: The best of the Baofeng handhelds . I don’t agree with his conclusion though…I find the UV-B5 to be the best choice due to the improved receiver, better antenna, improved S meter and rotary dial. But his article does a great job of comparing the radios so you can make your own decision.

Merry Christmas and 73, Bob K0NR

A recent edition of the ARRL Contest Update highlighted the availability of this shirt with the number 73 on it. Since this shirt is offered by Think Geek, I figured it had to be ham radio related. After all, we own the number 73! See my previous posting on the topic.

Well, it turns out that this shirt is actually derived from The Big Bang Theory television show, when Sheldon explains that 73 is The Best Number.

Check out this video clip:

Well, it doesn’t stop there. Using my friend Google, I found a number of web pages on the topic of the number 73. Wikipedia even has a page dedicated to it. (Who edits a Wikipedia page about a number anyway?)

Here are some fun facts about 73:

• 73 is the 21st prime number
• Reversing the digits of 73, produces another prime number, 37, which means 73 is an Emirp
• The PT boat in the television show McHale’s Navy was PT-73.
• In Morse code, 73 is a palindrome

But to me, 73 is still just Best Regards.

73, Bob K0NR

After losing Rooster, the alleged brains of the WG0AT SOTA team, we have great news from Steve, WGØAT.

Two new goats have joined the herd, getting trained up for more Summits On The Air (SOTA) action.

Meet Acorn and Barley, or is it Barley and Acorn? Watch out, Peanut, you’ve got company.

A while back I wrote a blog post about the availability of $20 software defined VHF/UHF radios in the form of re-purposed USB digital television dongles.

Now-days, with the improvements in software and documentation, the hardest part is finding the right dongle. What you order from EBay, and what you receive, can be two different things and only some of the dongles are suitable for use as VHF/UHF software defined radios.

So, I was pleased to see that at least one hobbyist electronics supplier has sought out and supplies a suitable device for SDR at a fair price :

Adafruit has available the USB dongle and “antenna” suitable for experimentation for $22.50, not far from the EBay (direct from China) price.

Click here to go directly to the product page: Software Defined Radio Receiver USB Stick – RTL2832 w/R820T

No, I didn’t receive a free evaluation unit and I don’t work for Adafruit … I’m just glad to see these useful devices available from a local company with an increased chance of you “Getting what you paid for.”

Adafruit also helpfully stock the adapter cables to convert the less common MCX antenna connector into the much more common BNC connector: MCX Jack to BNC RF Cable Adapter

Unboxing the Icom IC-F4161DT

As my wife would say, I am at it again with radios. I just picked up the Icom IC-F4161DT NXDN Radio. If you do not know much about NXDN I would recommend that you check out these few pages:

http://en.wikipedia.org/wiki/NXDN

http://www.nxdn-forum.com/

The reason I jumped aboard is that my club NI4CE has taking the leap with our 10 country coverage of repeaters we have started the process of updated them to NXDN. http://www.ni4ce.org/nxdn/

Here is a blurb, but you could read more at their site: Earlier this year, the West Central Florida Group, Inc. made a strategic decision to replace the D-Star digital repeater at Riverview with an industry standard NXDN repeater from ICOM. In addition, the new ICOM FR6000 UHF repeaters now in service at Verna (442.950 MHz) and Holiday (443.450 MHz) also support MIXED mode 25 KHz analog voice and 6.25 KHz NXDN digital communications on demand.

I decided that it was time for me to think about this challenge since I always like to be on the latest technologies and also I love radios ☺ I think we all know that by now if you have read my articles about Ham Radio.

Full post: http://nicktoday.com/unboxing-icom-ic-f4161dt-nxdn-radio/

While many are talking about how Solar Cycle 24 is the weakest since the Maunder Minimum (the period starting in about 1645 and continuing to about 1715 when sunspots became exceedingly rare, as noted by solar observers of the time — see this Wiki entry), there are moments when activity on the Sun strongly increases, providing brief moments of excitement.

Here is a case in point, witnessed by the Solar Dynamics Observatory (SDO; see SDO Mission) on June 7, 2011, when the Sun unleashed a magnitude M2 (a medium-sized) solar flare with a spectacular coronal mass ejection (CME). The large cloud of particles mushroomed up and fell back down looking as if it covered an area almost half the solar surface.

SDO observed the flare’s peak at 1:41 AM ET. SDO recorded these images in extreme ultraviolet light that show a very large eruption of cool gas. It is somewhat unique because at many places in the eruption there seems to be even cooler material — at temperatures less than 80,000 K.

This video uses the full-resolution 4096 x 4096 pixel images at a one minute time cadence to provide the highest quality, finest detail version possible.  The color is artificial, as the actual images are capturing Extreme Ultraviolet light.

It is interesting to compare the event in different wavelengths because they each see different temperatures of plasma.

Credit: NASA SDO / Goddard Space Flight Center

Video: http://g.nw7us.us/1aOjmgA – Massive Solar Eruption Close-up (2011-06-07 – NASA SDO)

Visit: SunSpotWatch.com

In the past two weeks, the results of several ham radio contests from last summer were posted. The typical contest takes months for the official results to be finalized and I have usually forgotten about the contest by then. The more serious contesters share their results via the 3830 web site so they can get an early read on how they did relative to their peers. But you need to be patient for the official results.

In the ARRL June VHF Contest, I placed in the top ten for the new Single Operator 3 Band category. This category is restricted to 50, 144 and 432 MHz, which is a good match to my radio interests. We had good 50 MHz conditions in Colorado (relative to other parts of the country), so CO stations seemed to score well.

Speaking of Colorado, in the Colorado QSO Party I finished first in the Phone – Low Power – Single-Op category. I was actually not that pleased with my score this year (45,500), which was considerably less than my score from last year (76,464). Oh well, I will invoke the Universal Purpose of Amateur Radio and say I had a great time in the contest, regardless of the score. Thanks to the Pikes Peak Radio Amateur Association for sponsoring this event.

The ARRL Field Day results are also posted. Joyce K0JJW and I did a one transmitter (1B) operation from the cabin using the club call KVØCO, resulting in a modest score (454). We mostly made phone contacts on 20m, 15m and 6m. We had some nice sporadic-e on 50 MHz, which is always a treat. Remember, the key to a fun Field Day is: Season To Taste.

73, Bob K0NR