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DEF CON 32: Another mind-blowing experience

By: Dan KB6NU
13 August 2024 at 19:40

I’m not a real fan of Las Vegas, but DEF CON is held in Las Vegas, so if I wanted to teach a one-day Tech class there, I just had to go. It was a fun, but tiring trip.

Getting there

I kinda made my travel arrangements last minute because the Ham Radio Village (HRV) folks weren’t sure that they were going to be able to secure a room for the class. That being the case, the only flight I was able to get was a late afternoon (4:50 pm) flight from Detroit. Same with the return. Instead of an early morning flight, I had to opt for the 1:15 pm flight, meaning that I wouldn’t get back to Detroit until after 8:00 pm. I managed to keep myself busy—there’s always something to do—but Wednesday and Sunday were mostly wasted.

I flew on Spirit. Enough said, I guess. It was packed. It was cheap, though, and the flight was direct to and from Detroit.

The flight out was fine. We even arrived about a half hour early. The return flight, however, was a real mess. We pushed back from the gate about 15 minutes late, but then, we sat on the tarmac for another hour and 45 minutes. I never did get a good explanation for what was happening. We arrived in Detroit an hour and a half late.

What a circus!

I stayed at Circus Circus because that’s what came up on booking.com as being close to the convention center. It was definitely close, but I really should have looked around some more. Circus Circus was built in the early 1960s, and it’s really showing its age. My room was clean enough, but the furniture was kind of banged up, there were spots where the wallpaper was peeling from the walls, and the air conditioner was very loud. Ugh.

There are many hotels around the convention center, and I think that if I shopped around more, I could have found a place with better rooms and a lower price. I took notes, and when I go back next year, I’ll be looking into those places as well.

Que rico!

Like everything in Las Vegas, the food is expensive. I lucked out, though, and found a place that was affordable, close to the Las Vegas Convention Center and my hotel, and delicious: Tacos El Gordo on Las Vegas Blvd.

Two tacos on a plate.
The food at Tacos El Gordo are worth the wait.

The tacos at Tacos El Gorda are the real deal. They advertise that the tacos are made Tijuna style, and you’d be hard pressed to find better tacos there. They’re made with handmade corn tortillas and homemade guacamole and salsas that are made from scratch daily.

When you enter Tacos El Gorda, you get into one of six lines, depending on the type of taco you want. On my first visit, I opted for the pork (adobada) tacos. In some places, they call this type of of taco a taco al pastor. The meat is sliced from a rotating spit, much like gyros is made, directly onto a tortilla. It really was excellent and only cost $4.12 per taco.

My second visit I decided to get a little more adventurous. I got into the line featuring organ meats, and after waiting in line for about a half hour, I ordered one taco de suadero (beef brisket—not so adventurous), one taco de cabeza (beef head—a little more adventurous), and one taco de buche (pork stomach—really adventurous). I liked the suadero and cabeza, but the buche not so much.

I’’m not really a gambler, but…

I’m not really a gambler, and in 2022 and 2023, I didn’t gamble a single cent. Many years ago, though, I bought some blackjack books and learned some basic strategy. So, this year, when I found a couple of blackjack machines in the Circus Circus casino that would accept $1 bets, I decided to give it a go.

Friday night, I fed a $20 bill into the machine and started playing. This machine was a little complicated in that it had a lot of side bets that you could make, such as whether you were dealt a pair or dealt 19+. I lost three of these sucker bets at a buck a pop before I figured that out.

Once I got that straight, I started playing plain old blackjack using the basic strategy. Using this strategy, your odds about 50-50, and that’s about how it played out. I pretty much broke even over the next half hour. Right at the end, I had a bit of a lucky streak, and when my total hit $20.80, I cashed out.

I say “cashed out,” but what the machine does is print out a ticket that you then have to take to a cashier to actually get cash. I thought that I might play a little again, so I just pocketed the ticket.

Saturday night, I did indeed decide to give it another go. There were only two machines that were working when I got to the casino, so I wandered around for a bit, visiting the circus stage and watching the hotel visitors try their luck at games on the midway. When I got back to the machines, one guy was just getting up, so I took his seat.

At first, I had a run of bad luck, and my total dropped to $15.30. But then, I got on a little bit of a roll, and built my total up to around $20 again. At that point, I played even with the machine for about 10-15 minutes. After a lucky streak bumped my total up to $25.50, I hit the cash out button again, and took the ticket to the cashier to collect my winnings.

My biggest class yet

The class went pretty well. Because we were only allowed to have 100 people in the room, HRV limited the pre-registration to 75. Despite the late start in publicizing the class, it filled up quickly. After getting all the pre-registered people in, they started accepting walk-ins, and we ended up with a class size of 90, making it the biggest class I’ve ever taught!

Since it was a bigger room than the one I taught in at HOPE, the setting wasn’t quite as intimate. The students had questions, but not as many as the HOPE class. Perhaps the size of the room had something to do with that. I’m not sure.

Unfortunately, we only had the room for seven hours, meaning that the students couldn’t test right away. Instead, they would have to take the test at DEF CON itself.

As a results, I’m not sure how many of the 90 students eventually passed the test. I know that over the course of the next couple of days I ran into several students who had passed the test. My guess is that a very high percentage did pass.

Mind-boggled

DEF CON is a truly amazing event. It’s a “hacking” conference, but the definition of hacking is about as broad as it can be. There were special interest groups, or “villages,” for a wide range of activities including hardware hacking, voting, lock picking (physical security), embedded systems, Internet of Things, and many more. And not only were there a couple of speaker tracks designed to appeal broadly, each village had their own series of talks. The enormity of it all just boggles my mind.

On Friday, I checked in at the Ham Radio Village and dropped off some of my No Nonsense business cards. I offered to help out, but they seemed to be all set, so I wandered off to experience the conference. I had a fun day attending talks, including a talk on open-source hardware for conference badges. I’ll be writing more about this later.

On Saturday, I updated my Ham Radio for Hackers slides and spoke on the topic in the Ham Radio Village. Like at HOPE, I had a really good turnout, and it was standing room only.

Immediately after, I went to hear a talk by Cory Doctorow in the main room, where he talked about the “enshittification” of the internet. If you haven’t’ heard this talk or read his articles about the subject, you should.

multi-colored bead bracelet
My wife, Silvia, loved this “friendship bracelet” that I made for her.

After that, I dropped in to the Women in Security and Privacy Village to make a “friendship bracelet” for my wife. I had been wracking my brain for something to bring home for her, and I knew the moment that I saw the program description that this was the right thing. Basically, the bracelets are simply a number of beads strung together on an elastic band. There were some letter beads, too, so I was able to spell out “SILVIA.” My wife loved it because as you can see, she spells her name a little differently than most Sylvias, and has always lamented the lack of things she could buy with her name on it. I scored a lot of points with Silvia when I got home, pulled it out of my bag, and slipped it on her wrist.

HRV Meetups?

After my talk on Saturday, a guy in his 30s (I’m guessing here) came up to me to talk about his experience with amateur radio. He had recently gone to a local amateur radio club meeting and was not received very warmly at all. He was so put off by the experience that he wasn’t sure whether to bother getting his license. Does that sound familiar?

I tried to explain that ham radio was a big hobby, and he unfortunately had just found the wrong crowd. I went on to say that not all hams were like that and encouraged him to get his ticket. Yesterday, I received an email from him that he had indeed passed the Tech test, and with the help of my study guide, also passed the General. That made me extremely happy.

Of course, he still needs to find his people. As I sympathized with him, it occurred to me that we need to create a way for hams like him to find other hams like him. I’m thinking of something along the lines of the 2600 meetups that used to happen around the country before Covid. Maybe we could even piggyback on existing 2600 meetups. I’ll be blogging about this soon, so if you have any ideas, I’d love to hear them.

Thanks to ARDC!

Thanks again to ARDC for funding this trip. The more I teach these classes, the more I’m convinced that we need to continue to reach out to this community. We need more people like the folks that attend DEF CON in amateur radio.

Back to the future: Are hackers the future of amateur radio?

By: Dan KB6NU
15 July 2024 at 21:24


Last fall, under the aegis of Ham Radio Village, I was awarded a grant to take my one-day Tech class on the road. Ham Radio Village believes that more people in technical fields should have amateur radio licenses and that amateur radio is underrepresented in the hacker, STEM/STEAM, and maker communities. Currently, there is little outreach to these communities about the benefits of amateur radio in their fields.

Enter the “ham radio evangelist.” In October of 2o23, we applied for and were awarded an $18,000 grant to reach out beyond the boundaries of traditional amateur radio communities, including scientific, engineering, hacker, maker, and STEM/STEAM focused conferences where attendees might have an interest in amateur radio (e.g., DEFCON, GRCon, Maker Faire, IEEE Communications Conference).

This grant provides funding to both educate these communities about amateur radio and to streamline the process of obtaining an amateur radio license. If accepted, HRV will give a talk about amateur radio, teach a one-day Technician Class license course, and offer a Volunteer Examiner test session at an event. These activities will provide these new hams with a lifelong hobby that aligns with their professional and technical interests. And, it will also enable these new hams to bring their experiences and ideas to amateur radio, thereby advancing the hobby.

HOPE couldn’t have gone any better

HOPE XV was the first event at which we evangelized ham radio. In my mind, it couldn’t have gone any better.

On Friday, I gave a talk entitled “Ham Radio for Hackers.” (Click here to see the slides.) I wandered in about 10 minutes before the talk was to start at 1:00 pm. There were already so many people there that I thought I was in the wrong room.

Adding to my confusion, was the fact that the slide announcing the previous talk was still up on the screen. I turned around and started heading out, but caught myself before I left the room. This had to be the place, and indeed it was.

In the talk, I explained some of the basics of amateur radio, discussed some of the projects that radio amateurs are currently hacking on, and then how to get a hacking, errrr ham radio license. I probably could have gone into a little more depth on some of the projects, but in general, I think that the talk was very well-received.

Tech class yields 25 new hams

On Saturday, I held my one-day Tech class. I was concerned that attendance would be poor because:

  1. They scheduled the class on Saturday, and there were lots of other interesting talks being held that day.
  2. They scheduled the class to start at 10:30 am, which could have thrown off my timing.

As it turned out, the class went really well. The students asked lots of questions—which caused the class to run about an hour longer than usual—but they were all good questions. 25 hackers passed the test and got their licenses. There were some failures, but it’s unclear whether those people were in the class or not. We invited anyone to show up at 5:00 pm and take the test, whether they were in the class or not. I’m going to claim that 100% of the students passed the test.

I can say that all those who passed the test were very excited that they did. Many of them came up to me after the class and thanked me. I can also say that this group was much younger than normal. I’m guessing that there were only two students over the age of 50. There was a good number of women, too. I counted at least six women.

I really want to thank the VE team. Without them, this couldn’t have happened. They were:

  • Seth, N2SPG
  • Nicole, AD2IM
  • Ed, N2XDD
  • Grant, W4KEK
  • Vlad, AF7QV

A great start

I think that this is a great start to the ham radio evangelist program. Not only did we license 25 new  hams, they all seem very interested in the hobby.

I also talked to a lot of different people about the program. One fellow, a young guy working with the Philadelphia Maker Faire, invited me to contact him about doing a class next spring.

So, onward and upward! I think the hackers at HOPE are just the kind of people we want to get into the hobby. They’re young and interested in hacking ham radio. It will be fun to see what they can do.

Finally! My Extra Class study guide is available in all formats

By: Dan KB6NU
26 June 2024 at 19:09

2024 No Nonsense Extra Class License Study GuideMy  No Nonsense Extra Class License Study Guide is finally available in all formats, including:

  • PDF. You can read this version on practically any device.
  • ePub. You can sideload this version to Kindles, Nooks, and read it with ePub applications.
  • Kindle. Purchase this version to have it appear in your Amazon digital library and read it on Kindle readers or tablets.
  • Print. Get this version if you want to read it in print.

June 1, 2024 One-Day Tech Class a Success

By: Dan KB6NU
10 June 2024 at 12:36

My latest One-Day Tech Class took place on Saturday, June 1. There were only 13 in this class, fewer than most classes that I teach. I think the main reason for this is that the university school year had already ended, so there were only a couple of students in this class.

Students taking a test.
Students in my June 1, 2024 one-day Tech class taking the license exam.

Nine of the thirteen passed the test. This is a little lower than usual, but one of the students was a ten-year-old who seemed more intent on playing with a yo-yo than actually getting a license. Another was a young man who didn’t miss by much. He took the test again on Saturday, at our club’s regularly-scheduled test session, and passed. So, if you don’t count the ten-year-old—and I generally don’t count anyone that young—then the final result is 10/12, which is much closer to my usual pass rate.

I got a kick out of one guy in the class. He was so afraid that he had failed the test. As he was waiting for his exam to be scored, he asked me about one of the questions. Unfortunately, he had chosen the wrong answer, and when I told him this, he got even more anxious. In the end, all of his worrying was for naught, though. He passed with a score of 30/35.

As always, thanks to the VEs who came to administer the test. These included (in alphabetical order by call sign) Dinesh AB3DC, Ed AB8OJ, Don AC8TO, Steve AC8YA, and Mark W8FSA,

I’ll next be teaching at Hackers on Planet Earth (HOPE) in New York City in July. If you know someone who would like to take the class, have them contact me, and I’ll email them when the date is set. After that, I’ll be teaching at DEFCON in Las Vegas in August.

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