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Dan KB6NU

Get on the repeater!

November 10, 2002 By Dan KB6NU Leave a Comment

As previously reported, I just bought an IC-207 dual-band rig. It’s a great rig, but for the first two days I didn’t make a single contact on the local repeater. I was not, of course, monitoring the whole time, but you’d think I could raise someone on a Friday or Saturday night. Maybe not, though. I guess the other hams in the area have a life. :)

I did finally manage a contact Saturday night with a fellow who was on his way to Detroit. We had a nice chat, and I found out that he’s a local guy who’d just gotten his license in June. The interesting thing is that despite living in Ann Arbor for the last four years (as a University of Michigan student), he was not familiar with our club, nor of the fact that we owned and operated the repeater we were using.

Of course, I took the opportunity to invite him to our meeting this Wednesday (for more details, see our website), and I think there’s a good chance he’ll show up. I had a similar experience last month. On my way to the club meeting, I had a QSO with a fellow ham, and I mentioned that I was on the way to the meeting, we’d love to have him attend, too. He replied that he’d been meaning to come to a meeting and join, but for one reason or another, just never got around to it. I pressed the point, and he actually did show up. In fact, he brought his checkbook along and paid his dues as well.

My point is that one of the best ways to promote your club is to monitor your local repeater and talk up your club and its activities at every opportunity. Invite people to attend your meetings. Invite them to check in to your nets. If you don’t have a net, start one. If you do some of these things, I think you’ll be pleasantly surprised at the results.

Filed Under: Clubs, VHF/FM/Repeaters

Small Wonder PSK31

November 6, 2002 By Dan KB6NU Leave a Comment

A couple of years ago, I bought and built the SST-20 20m QRP rig from Wilderness Radio. While I haven’t had that much success with this rig–I attribute this to my poor antenna skills–the kit went together pretty easily and was fun to build. (If anyone wants to buy this from me, you can have it for the kit price: $85)

Now, I’m thinking of trying it again. This time with one of the PSK31 rigs from Small Wonder Labs. They make several different models, including one for 10m that looks relatively easy to put together. Apparently, these rigs interface directly to a 16-bit sound card.

As for the computer, I have an old Windows box that I was thinking of converting to Linux. Another possibility is to buy an old laptop for use in the shack. The advantage of the laptop is that it would take up less space in the shack. A third option is to try to get one of the Linux PSK31 packages to run on my Sharp Zaurus. A Google search for “linux psk31” turned up quite a few references to PSK 31 software running on Linux machines.

I have a couple of questions:

  • Has anyone built one of the PSK31 units? Having any success with them?
  • Am I crazy for thinking about the 10m unit? Should I go with one of the other bands?
  • Is anyone running PSK31 software on a Linux box? Which package do you think is best?

Filed Under: Digital Modes, Kits

A Tip For Using the Autek VA1

November 3, 2002 By Dan KB6NU 1 Comment

In the last entry, I mentioned not being able to tune the antenna for an SWR lower than 1.5:1. Well, it struck me last night as I was falling asleep why this was so. When calculating the SWR, the Autek VA1 assumes that you’re using a 50 ohm feedline. D’oh!

Fortunately, the Autek allows you to change that setting. You can program it to a number of different values from 25 ohms up to 450 ohms. Now, I’ll just have to remember to do that when working with RG-59 or ladder line or whatnot.

Filed Under: Antennas, Gear/Gadgets

Fun With Antennas

November 2, 2002 By Dan KB6NU 1 Comment

I got back on the shortwave bands in August, putting up a 20m dipole. While 20m is fun, I’ve wanted to try out some of the other bands, too. When I was a kid, I used to work 40m a lot, especially late at night. So, I decided to put up a 40m dipole.

I’m lucky in that I have a number of trees to use as an antenna support. While there’s not quite enough space to string an 80m dipole, I guesstimated that a 40m antenna would fit quite nicely.

So, I mail-ordered a bunch of stuff from RadioWorks. The stuff was very nice quality, but I was a little miffed that some of the prices were higher than advertised. I understand that prices can change, but they really should make an effort to update the ads they run in QST and other magazines. It looks to me like they haven’t been updated for more than a year.

At any rate, I got all the parts, and in rummaging through my junk boxes came across a 1:1 balun that someone had given me. I built the dipole using that balun instead of the RadioWorks balun that I’d just purchased. The antenna wire I bought is that fancy, flexible stuff. As advertised, it was very easy to work with, and looks to be quite strong, too. I also put together a 100′ RG 59 cable.

So, Saturday afternoon I get out into the backyard and string it up. Using the Autek VA1 antenna analyzer, I adjust the length for the lowest SWR I can manage. Oddly, it doesn’t seem as though I can get it much lower than about 1.5:1, but that’s OK. It should still work. (More about this later.)

Finally, I get the thing up in the air, and hurry down to the shack to give it the smoke test. I check the SWR again with the Autek, and it looks pretty good. I connect it to my rig–an Icom IC-735–and tune around for a clear frequency. Finally, I put the power to it, and adjust the internal SWR meter.

Wow. The SWR looks even better than it did with the Autek. I send out a few Vs, and then my wife comes rushing downstairs. “”You’re coming in loud and clear,”” she says, “”over the computer speakers! AND you’re making the garage door go up and down, to boot!””

Yipes. I didn’t have this problem with the 20m dipole at all, and I thought a balun was supposed to help reduce RFI.

At this point, it was almost dinnertime, so I just pulled the plug on the rig and decided to sleep on things. It’s too bad, too, because I had wanted to make a few contacts in the CW Sweepstakes Contest. Oh well.

Filed Under: Antennas, EMI/RFI Tagged With: dipole, rfi

My Icom IC-735

November 1, 2002 By Dan KB6NU 3 Comments

The rig I use on the HF bands is the Icom IC-735. I like it a lot, and while it doesn’t have some of the features found in the newer rigs, such as DSP or spectrum display, I really don’t feel the need to upgrade at this time.

The receiver is very good, and it puts out about 100W, which is sufficient for most operation. I also really like the break-in keying.

Having said that, it does have a few quirks. Several years ago, the backlight on the display quit and the power on-off switch is now intermittent. Anyone else out there have this problem? If so, is it an easy fix?

Filed Under: Gear/Gadgets Tagged With: backlight, IC-735, Icom

CQ CQ CQ de KB6NU

November 1, 2002 By Dan KB6NU Leave a Comment

My grandparents were responsible for getting me into ham radio. They had an old Philco console with an AM band, a shortwave band, and a built-in record player sitting in their basement. I used to love to go over there and listen to shortwave broadcasts from the BBC, Radio Canada, and all the other SW broadcasters of that era. The shortwave band included the 31m and 19 m broadcast bands as well as the 20m ham band.

One day while tuning from the 31m band to the 19m band, I asked my dad what those stations were that were sending Morse code. He replied, “Oh, those are ham radio operators,” and explained a little bit about amateur radio. As the radio did not have a BFO, I couldn’t really copy the CW or the sideband phone signals, but I still thought it was pretty cool that you could actually set up your own transmitter and make contact with stations all over the world.

It took me a while–mostly because our family didn’t know any amateur radio operators–but I finally obtained my first ham in 1971. In fact, my first license was dated July 16, 1971–the date of my sixteenth birthday. My first call sign was WN8KTZ.

I operated from the basement of my parents house, first using a Heathkit DX-60 transmitter with a Hammarlund HQ101 receiver. I soon upgraded both my license and my station, becoming WB8KTZ and buying and building a Heathkit HW101. My antenna was a Hy-Gain 14AVQ vertical.

College put a damper on my amateur radio activities, although I still operated from time to time. After receiving my BSEE from the University of Detroit, it was off to Sunnyvale, CA. My first job out of college was with Amdahl Corporation, then manufacturing a line of IBM-compatible mainframe computers. Being a recent graduate, I didn’t have much money for a place, so we ended up in at one-bedroom apartment. There wasn’t much space for antennas, and I wasn’t on the air at all from that QTH.

My immediate supervisor was Dave Roznar, W6TGE. Soon after starting there, we both decided to upgrade to Advanced class. We blew off work one day, took the train up to the San Francisco FCC office, where we both passed our Advanced written exam. That’s how I became KB6NU.

In light of the fact, that they are no longer issuing Advanced class tickets, I’m thinking of keeping mine for the duration. My goal is to become the last living Advanced class licensee in the US.

Despite having been licensed for so long (I even qualify for QCWA!), I really haven’t been all that active over the years. While in California, I lived in apartments and condos, and not being an antenna genius, I never could seem to get an antenna to work very well. When I moved back to Michigan, I just never got motivated to get back on the low bands. I bought an HT and worked the repeaters, but that never seemed like “real” ham radio to me.

Fun on Field Day
Now, however, I’ve seen the light.

What got me started was taking part in the ARROW 2002 Field Day. To be honest, I wasn’t going to go at all. I was feeling a little guilty about not helping set up, and Sundays are when I usually go bicycling (my other big avocation).

That Sunday, however, I was feeling lazy and it was really hot. So, I opted to go to Field Day instead. The first guy I met when I got there was Mark W8FSA, then president. He had been there most of the night and was just eating some breakfast. When he finished his bagel and coffee, he said, “Well, you didn’t come to hear me chatter. Let’s do some operating.”

He had set up his Kenwood transceiver in a trailer that someone had towed out to the site. He first suggested that we try 20m phone. The only problem he said was that the G5RV antenna that he had connected to the rig wasn’t really working all that well on 20m and the antenna tuner didn’t seem to be much help. After a fair amount of fiddling, he finally got the antenna tuned, but it was quickly apparent that we weren’t putting out much of a signal. We made a few contacts, but more often than not, stations we called did not come back to us.

That’s when I suggested we try CW. Neither of us had done much CW operating lately, but I reasoned that we’d have more success with our poor signal on CW than phone. Mark was kind of hesitant, but I said, “What the heck. We may not be the best CW ops, nor are we the most experienced contesters, but it will be fun.”

After prodding him a little more, he finally agreed. I went off to find a key. When I got back, he’d already gotten the rig tuned up on 15m (our other HF station was working 20m CW). We connected up the key and started tuning around. We soon found a station calling CQ FD.

“Call him,” I said, wanting to give Mark first honors. He pushed the key over to me and said, “You do it.” So I called and the guy came right back to me. How cool! It was the first CW contact I’d made in years. It took me a little while to figure out the CW contest protocol, but soon I felt pretty comfortable with it, and we started making contacts. If we could hear them, they generally could hear us. We were really rusty, though. Sometimes after we’d made a contact, we’d have to listen for a while to make sure we got the other station’s call right.

I’d like to say that we racked up hundreds of points that morning, but by the time we got on CW, it was already noon, so we only had a couple hours left. And because I wasn’t the most experienced contester, I only called stations that I heard calling CQ. All in all, I made 24 contacts from noon to 2 pm. Not a stellar performance, but it was a lot of fun.

Back on the Low Bands
That experience has prompted me to get back on the low bands. I dug out my Icom IC735, which had been languishing in the closet since I moved two and a half years ago, and found the box containing my antenna parts. Fortunately, I had enough wire and coax to build a 20m dipole. Consulting an old Handbook, I cut the elements so that the antenna would resonate about 14050 kHz. To install the antenna, I attached a pulley to my house about 25 feet up. The other end I attached to an obliging tree in my backyard. The length of RG-59 coax I had was just long enough to make it into the shack.

Now, as I’ve said, I’m no genius when it comes to antennas, so I was pleasantly surprised when the SWR was low enough to not blow the finals in my rig. It wasn’t resonant on 14050, but close enough, so I began tuning around for a CQ. The first station I heard was XE2AHN. I called him, and he came back. My first HF contact in years was a DX contact!

I’ve since filled up a page in my log book. Amazingly, almost half of the 30 contacts are DX contacts. I’ve worked Wales, Italy, Ukraine, Russia, England, Brazil, Colombia, and Spain. I’ve also worked a bunch of domestic stations, and chewed the rag with a couple of them. I’ve also joined FISTS, the International Morse Preservation Society. Seems like a pretty cool group. My FISTS number is 9342. My immediate goal is to improve my CW operating abilities enough to really rack up some points next year on Field Day.

Projects and Other Activities

  • I’m the treasure of the Arrow Communications Association. We operate several repeaters in Ann Arbor, MI; our 2m repeater is on 146.96(-) MHz. We also hold classes and volunteer license examinations. We’d love to have you as a member if you’re in the area.
  • I’m doing a little research into the Internet Radio Linking Project and what it would take to get our repeater linked up. I think it would be really cool to talk in on 146.96 and talk to someone in New Zealand or Great Britain.
  • The ARROW is now in discussion with the Hands-On Museum to set up a station at the museum to teach people about ham radio. If you’d be interested in helping with this project, please e-mail me and I’ll put you in touch with the right people.
  • I built a 20m Wilderness Radio SST QRP rig. I hope to take this out on a bike tour sooner or later.
  • I also need to work on some kind of multi-band antenna before the winter. I’d like to work 40m as well as perhaps 30m and 10m.

Filed Under: Everything Else Tagged With: bio, kb6nu

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