We had our annual Mid-Iowa Skywarn Association business meeting this evening prior to the annual Polk County storm spotter session. Jim NA0R, who had been working with Skywarn and ARES for some 30 years, officially retired from MISA as president and net control this evening. He had previously served in ARES in several leadership positions and also worked at the state emergency operations center at the STARC-Iowa National Guard Armory, serving as a liaison between amateur radio, ARES, and the National Guard and all other agencies in the EOC. He was a man that took great pride in public service and was always ready to go when called upon.
This, of course, meant that there would be new blood coming into those various leadership positions. I am pleased to announce that I was elected through a close write-in vote to serve as the next president of Mid-Iowa Skywarn, which is effective immediately. I am grateful to be elected to this position, and I do indeed have some big shoes to fill and expectations to exceed. I learned this evening that Jim and I have very similar reasons for joining Skywarn, which I will likely write about later down the road. I plan on hitting the ground running, and I have plans to act on. Tom N0VPR was also elected to the role of secretary/treasurer — Tom has been working with Skywarn and ARES for quite a while as well, and we have worked with each other as president/vice president for the local club.
The Mid-Iowa Skywarn Association is the organization that mans the amateur radio station in the Des Moines National Weather Service office, using call sign K0DMX. It takes storm reports from all corners of the NWS Des Moines’ 51-county warning area through an extensive VHF/UHF linked repeater network. We’re lucky to have a great relationship with the Des Moines meteorologist-in-charge and warning coordinator.
After the brief meeting, we moved on to our annual two-hour spotter training class presented by the NWS. It was a great presentation, I thought. It included some new pictures and videos. It was certainly a good crowd, probably more than last year. If maybe a half-dozen more people showed up, we would have run out of seats. A lot of new faces I haven’t seen around — either they are hams that don’t usually come to our “normal” club meetings or this was their first time attending a storm spotter course.
Tom set out some amateur radio information brochures and fliers, along with business cards that listed information about the DMRAA and its meetings. After the presentation, non-hams were mingling with the hams asking how to get involved in amateur radio, and most of those business cards were gone, so I’d say the training session also sparked some interest in amateur radio. It turned out pretty well.
Urgent Communications reports that the Public Safety Communications Research (PSCR) Project 25 fireground testing scheduled for this month has been delayed until this spring. The delay was forced by an extended comment period.
Two years ago, that same laboratory found that digital radios fared far worse than their analog radios on the fireground. The likely problem? Ambient noise — most notably SCBA masks, SCBA alert bells, PASS communicators, water pumps, and other ambient noises associated with working fires. The ambient noise distorts the audio, because the IMBE vocoder is generally designed to capture human voice and cut the background noise out. But when you have dozens of other competing sounds that are as loud or even louder than the human voice, the vocoder can become confused and the audio is distorted.
These radios, which were designed to help firefighters, are often blamed as a contributing cause of some firefighter injuries and even deaths when mayday calls were not heard by others on the Cincinnati-area digital radio systems. Other complaints include dead spots, an inability to override ongoing radio traffic with more urgent radio traffic (getting a busy signal instead), and a one- to two-second delay for transmitting after squeezing the push-to-talk button.
Fire departments aren’t the only agencies grappling with issues. Police departments are also suffering from dead spots in coverage that cropped up only after the digital systems were deployed.
Similar failures are being reported all across the United States, not only with Motorola P-25 systems but M/A-Com OpenSky systems as well. In some instances, departments are bailing on their multi-million dollar digital radio systems in favor of their older analog systems.
A new toy for D-STAR aficionados has hit the shelves and is generating a lot of buzz. The DV-AP, produced by INet Labs who brought you the DV Dongle, is similar to the homebrew D-STAR Hotspot. The device is used for simplex operations, but it does connect to the gateway. The DV-AP plugs into your Windows or OS X computer via USB and uses the computer’s internet connection to communicate with the D-STAR gateway. The DV-AP broadcasts a very low-power signal. It’s similar to the functionality of a simplex Echolink link node. The device’s 10-milliwatt signal on the 2-meter band is intended to reach only a few hundred feet, but it allows you to use your D-STAR HT away from the computer around your house or around your neighborhood at low power.
You can learn more at the under-construction website for the DV-AP at http://dvapdongle.com/, and there’s already a Yahoo Group for the product that can be viewed by clicking here.
It looks like a rather robust toy with many configuration options. Mac users will be glad to hear that this device works on OS X, and Linux users will also be delighted to know that the required drivers are already included into the kernel.
The DV-AP is currently being sold at Ham Radio Outlet for $249.95. You can find it on their website by searching for “DV-AP”. However, HRO shows it as “out of stock.”
Do you have a DV-AP in your hands? What do you think of it so far? Let us know by posting in the comments!
This website is about all things amateur radio and scanning in the midwest.
I was interested in scanning since I was a little kid, with my father working for the Des Moines Fire Department for most of my life through my high school career. Got my radio license in October 2008 at Iowa State University. Later [...]more →