Here’s a presentation I gave last night at the February meeting of the Montrose (Colorado) Amateur Radio Club. I generated the presentation in response to a request to explain how to get the ARRL’s Logbook of the World (LOTW) to work. I decided to backtrack a bit and also include background on logging and QSLing.
I recorded audio to go along with the slides today.
Here’s your video introduction to Section 8.1, “Digital Protocols and Modes,” in the ARRL Extra Class License Manual for Ham Radio.
When you have finished viewing the video, have studied the section, and are comfortable with the associated questions in the question pool, you can return to the list of videos for Amateur Extra Class by clicking here.
There is an error in the discussion of Frequency Hopping Spread Spectrum. The chart is correct, but the annotation chooses the wrong row of colors for the zero case. The correct row for the case of a one is the top row, and the correct row used in the case of a zero is the second row, not the third. The third row is actually the transmitted sequence. Sorry ’bout that!
Front panel of the Oak Hills Research 100A QRP radio kit after assembly. The controls are RF and AF gain, RIT, Bandwidth, and main tuning.
My Christmas present in 2014 was an Oak Hills Research OHR 100A 20-meter QRP radio kit. I’ve played around with QRP in the past and found it a fun way to operate. QRP is the Q-signal for “low power,” by convention meaning less than five watts output, as opposed to QRO, generally taken to mean higher power of at least 100 watts. QRP generally means Morse code (CW) because CW gets through where voice modes, such as single side-band, do not. Some people think that QRP is the cat’s meow, and other people prefer a lion’s roar! For me, five watts on 20 meters is enough to have solid and satisfying CW QSOs.
The OHR 100A comes as a kit and is available from www.ohr.com, a subsidiary of Milestone Technologies. As of this writing the kit is $179.95. A ten-turn potentiometer that acts as a bandspread is available for $17.95, and a built-in keyer is available for $29.95. Although I ordered both the ten turn potentiometer and the keyer, right now I’m operating the rig “stock.” I will install both of these options in due time; in the meantime I’m getting reacquainted with my straight key.
Rear panel of the Oak Hills Research 100A. The keyer option hasn’t been installed yet, so those holes are vacant. Note the unusual key connector: an RCA jack! The radio has separate connections for headphones and a speaker; attaching headphones will mute the speaker.
The radio’s design is about fifteen or twenty years old. It was reviewed briefly in the December, 2000, issue of Continue reading →
Here’s your video introduction to Section 7.1, AC Waveforms and Measurements, in the ARRL Extra Class License Manual for Ham Radio. This video introduces the section. After watching the video you will want to study the section and study the associated test pool questions.
If you have any questions, comments, concerns, or spot an error, please reply to this post or directly on YouTube. Good luck with your studying! When you are done, you can click here to return to the list of videos.
Red rock country, right? Temps in the low 100°F’s, right? Four wheeling and hit those trails, right?
Well, maybe not in winter. Loretta and I took our Christmas retreat this year in Moab—and got right properly snowed on. Add snow and fog to the red rocks and out come some wonderful views not available to all those who throng Moab “in season.” Here are 11 examples, all taken with my iPhone 5S.
We toured Arches National Park on Christmas Day. The Park was wide open, but there were no attendants at the gate. That meant free entrance. It also meant no map. We thought we’d have the place to ourselves, but not so. Lots of California plates, and lots of Asian tourists. Everyone was very friendly.
Arches National Park: Balancing rock. Note the blue arrow and circle in the lower left hand corner. That’s a tourist to give some perspective. There are other tourists closer to the formation that are barely visible, so, yes, it’s really big. You will never catch me throwing a sleeping bag under this one and pretending to be able to sleep!
1944 IBM full-page advertisement in an art magazine. It reads: “Liberation. It is our obligation to back the Liberation forces by investing in War Bonds to the extent of our ability. International Business Machines Corporation.”
My wife found this in an old art magazine, dating back to October, 1944. One would wonder what IBM was doing advertising to artists, but during World War II, with rationing in effect, no one could buy just any old thing. So companies advertised just to keep their brand names in front of consumers so that when the war ended, they’d remember the company’s name.
It’s interesting to look back. During the Iraq and Afghanistan wars, one would hardly know we were at war. There were no shortages. Those who fought were all volunteers. Our taxes didn’t become outrageous. But in the early 1940s, President Franklin Roosevelt asked people to invest their savings in War Bonds, akin to what we call Treasury Bonds today. Essentially an entire generation of young men went to war—in fact, if you were a man of draftable age, you were expected to be in the service. My dad lied about his age (something you could do in that pre-computer age) to join the Navy, saying he was 18 when in fact he was 17. And he was in for the duration, too. He fought in the Pacific theater and was the pilot of a landing craft in the Philippines. If you were a civilian back then, you faced rationing and shortages. Further, many women went to work in the factories to produce war materiel and do behind-the-scenes work. (It was unfortunate that women didn’t keep those privileges after the war!)
The ad shows the starkly simple production style of 1944. No fancy visuals. In fact, it was intended to emphasize the company’s economy and dedication to the war effort—no frills allowed!
I worked much of my adult life for IBM and retired from them in 2013. I’m very proud to say I was (am) an IBMer.
YouTube somehow truncated the original General Lesson 1.2 video, so I re-posted the complete video and put a notice on the bad one that points viewers to the complete version. Thanks to reader Bob Esplin for bringing the issue to my attention.
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