AmateurRadio.com

I’d wanted to create an APRS object for the Ridgeway Repeater Group‘s two voice repeaters, GB3TD and GB3WH for a while. In practice, this just means making sure that they show up on the map in the right place, when someone goes to http://aprs.fi and looks at the area.

I wanted to display an icon for them, showing the approximate position and their callsign, and some detail available, if someone clicks on the icon. I’d looked at various ways of doing it, but found OpenAPRS the best method.

I’d looked at doing this a few months ago, but had stalled, because OpenAPRS required me to verify my account using an ‘RF APRS client’ which I didn’t have – all my APRS interfacing is done through the Internet. Without verifying my account, I couldn’t create objects on the APRS map.

When I was looking at OpenAPRS the other day, I noticed that they were offering another method of verifying accounts, using Paypal and a small (dollar or so) donation. I was happy to pay this and sure enough the account was verified very speedily.

Having done this, it was straightforward to create an object for each of the repeaters using Tools/Create Objects and then clicking on the map in the appropriate place and entering the information. In some ways, rather than clicking on the map, I’d have preferred to manually enter the latitude and longitude, but this didn’t seem to be possible.

Either way, GB3TD and GB3WH are now represented on the APRS map. I like this – and it provides some useful information to people about where they may find activity in particular localities.

Tim Kirby, G4VXE, is a regular contributor to AmateurRadio.com and writes from Oxfordshire, England. Contact him at [email protected].

Is it just me or have the ‘zed and eHam had significantly less article comments over the past six months or so?  One reason could be the bands, though I think there would be more people surfing the Internet and sharing their radio artisan enthusiasm online if that was the cause.  Perhaps Facebook and Twitter [...]

Is it just me or have the 'zed and eHam had significantly less article comments over the past six months or so?  One reason could be the bands, though I think there would be more people surfing the Internet and sharing their radio artisan enthusiasm online if that was the cause.  Perhaps Facebook and Twitter are taking their toll?  We'll have to see if this trend continues; perhaps we're entering a Maunder Minimum of ham forum activity.

While we're waiting for better bands, enjoy this video:




Hmmmm.  Maybe Youtube has something to do with this lack of activity....
Anthony Good, K3NG, is a regular contributor to AmateurRadio.com and writes from Pennsylvania, USA. Contact him at [email protected].

It seems that I’ve been doing more RTTY contesting lately, and on Saturday, I spent about 8 1/2 hours participating in the SCC (Slovenia Contest Club) RTTY Championship contest. This was a 24 hour contest, running from 8AM Saturday to 8AM Sunday (local time), and it’s one of the contests where anybody can work anybody. I like those, because even if propagation isn’t cooperating, I can usually work someone in the US. This is a good thing, because propagation wasn’t all that great, and as it turns out, just about 50% of my contacts were with US stations.

There are some interesting scoring rules in this contest that I haven’t seen before. In many DX contests, you get more points for working DX which favors certain parts of the world where there are literally dozens of countries in an area the size of the US. However, for this contest the rules are set up so that within “big” counties (like the US, Canada, Australia, Japan, Argentina, and others) you get extra points for working stations within that country but who are in different call areas, provinces, or oblasts. I wish that some of the other DX contests would use this system which seems to level the playing field a bit. One other scoring rule that is fun is that the multipliers are the year that you were first licensed. I worked a few stations who were first licensed in 2010 (all of which were, I believe, specially issued callsigns), but it was fun working stations who were licensed in the 1940s and even in the 1930s. I worked a couple of stations who were licensed in the 40s, but both of them turned out to be using club callsigns, which of course were issued when the club was originally founded. (Still quite impressive to be sure). The oldest non-club call that I worked was Charles, W0HW, who was first licensed in 1937. According to the information on qrz.com, he was born in 1922, so Charles, who is now 88 (and obviously still active on the air) got his first license at age 15. I’m sure he’s got a lot of interesting stories to tell.

As with a lot of my contesting, I tend to fit it into the “space available” on a weekend. For this contest, I didn’t get started until around 3:30PM (local time), at which point I configured my contest logging program for this contest and got on the air. I listened briefly on 15m but since I only heard one very weak signal, I decided to start off on 20m. For about the first half hour, I ran in Search & Pounce (S&P) mode, working just under 20 stations. As I was tuning, I found an open frequency right at the lower end of the 20m RTTY sub-band (14.084Mhz), and I figured that I’d try to see if I could switch to Run mode. As I’ve mentioned previously, being able to run stations really improves you rate and it’s also a lot more fun. It’s usually difficult for a low-power station like mine to hold a run frequency for long (because usually a higher-power station will just sort of take over, despite the fact that it’s poor operating practice, at best, so do so; it’s arguably illegal as well), but I was thrilled to be able to stay on that same frequency for around 4 hours. I can’t say that I had huge numbers of stations calling me the entire time, but there were periods where I was working about 2 stations per minute continuously for several minutes. For this contest, it seems that 2 per minute was about the maximum achievable because the rate of information exchanged is fixed (a characteristic of RTTY), and the amount of information that had to be exchanged was of a certain length. Unlike a CW or Phone contest, you simply can’t go much faster. (Yes, there are some shortcuts, but they don’t make that much difference, especially when you don’t have a continuous pileup.) I was very pleased to be able to continue my run for that amount of time.

I took a break and went out to dinner with Sharon (who, as usual, was being very understanding about the contest), and got back to the radio at around 9:30PM, worked a few stations on 20m, then moved down to 40m. The conditions on 40m seemed to be surprisingly good, and I was able to work a good number of European stations first running S&P and then later when I had a run frequency. (That run wasn’t nearly as good as the 20m run, but it was still quite productive). After a while, I seemed to have run out of stations on 40m, so I moved down to 80m to see what I could find. During the summer, 80m isn’t great for DX because it’s noisy due to the thunderstorms that are common during that time of the year. After a while, including a period where I had a rather unsuccessful attempt and running station (plenty of frequencies were available, but apparently nobody could hear me), I moved back to 40m again. Somewhat to my surprise, the propagation had improved, and by that time, some of the early-risers in Europe were awake to work the night-owls in North America. (It was around 1AM at that point.) I continued to work stations on 40m, but at 2AM, I finally threw in the towel and finished up with 207 (non-duplicate) QSOs in the log. As it turns out, I was up for over an hour after that acting as the family “IT guy”, fixing a problem with Sharon’s BlackBerry. Needless to say, I didn’t get up early enough to put a few more QSOs in the log the next morning, so that was my final total.

Here’s my detailed score summary for the contest:

Band    QSOs    Pts  Sec
 3.5      29      57   25
   7      67     168   42
  14     111     268   50

Total     207     493  117

            Score : 57,681
    

This was my first effort in this contest, so I don’t have anything to compare it to, but I was very happy with the results.

David Kozinn, K2DBK, is a regular contributor to AmateurRadio.com and writes from New Jersey, USA. Contact him at [email protected].

Back in 1964 as a novice, it seemed like the strongest signals I heard in Central Indiana were the Florida stations. Man, seemed like they were always there, louder than anything else. As a new ham and teenager, I always thought how cool it would be to live in Florida, the land of fantastic propagation.

Sure been disappointing lately… the bands are noisy, the thunderstorms consistent and sometimes it seems like no one else is on the air. What happened to my Florida ham radio paradise dream?

Are the bands working elsewhere? Boy, we have had some poor conditions lately. How about you?

On  a high note (pun intended) it was pretty cool to watch QRPSPOTS.COM yesterday as lots of hams helped give signal reports to the Iowa High Altitude Balloon launched by W0OTM team! Congrats on creating some excitement and interesting reports. Now, if I can just get my antenna up to 30,000 feet or more, maybe my FL QTH will be ham radio paradise after all.

72,

Kelly K4UPG PB #173

Kelly McClelland, K4UPG, is a regular contributor to AmateurRadio.com and writes from Florida, USA. Contact him at [email protected].

When I lived on my parents’ farm in Ohio, I used to install Beverages.  That was back when copper was cheap and I bought 500-ft rolls of #14 THHN for $10 each.  N8ET gave me some ferrite toroids (of unknown mix, probably 77) and I added some parts from RadioShack to build some killer listening antennas.  The best setup was three unterminated (bi-directional) ones that covered the compass.  When I lived in Minneapolis, I went to W0AIH to operate the low bands.  And, when I lived in Urbana, IL, I didn’t operate 160 and didn’t need the low-noise receiving antennas—or I went to NO9Z.  Now, I live in the suburban wasteland between Washington and Baltimore.  It was time to do something about the receiving situation.

Armed with my (autographed, no less) copy of ON4UN’s Low-Band DXing, I began thinking of what options I had.  A small RX 4-square developed by K9UWA, W8JI, and others was appealing.  But, it’s too large to fit comfortably on my lot.  I considered a pair of short verticals with a phasing box (a project that has been in my queue longer than any—since 2003).  But, I ended up settling on the K9AY “loops” because they are small and portable, having an integral ground radial and a single ground rod.

When I lived in Urbana, I had considered doing a set of K9AYs.  So, I had purchased the parts to build a nice balanced preamp based on a QEX article by IK4AUY (this design is actually based on an even older Ulrich Rohde design).  Note that the version of this preamp presented in ON4UN’s Low Band DXing, 4th edition, is wrong—if you see IK4AUY’s web site you shouldn’t miss it.  Several months ago, I had assembled one on a perfboard (and tested it—so I thought).  When I tried the preamp again over the weekend, it didn’t amplify the signals on the antenna side.  The 2N5109 transistors are heat-sinked and so should get warm to the touch during operation.  They did not.  This suggested that they weren’t even being biased properly.  So, armed with a DMM and the schematic, I started following the Vcc line.  Megaoops.  I failed to connect the collectors to Vcc.  That fixed the problem and the preamp worked like a charm.

I built the classic K9AY crossed loops at 90 degrees for four-direction switching.  Here’s my switchbox (built using 48-volt relays scavenged from the AT&T Long Lines system in the post “Resume of a Master Dumpster Diver“).

This box may have layout problems.  If you’re an expert on K9AY loops, please weigh-in.  The terminal strip at right is for the control wiring.  I had originally planned to run Siamese RG-6 (scavenged from a DBS installation initiated by some lying, theiving, lazy, pot-head, good-for-nothing duplex neighbors we had in Urbana—they also discontinued our shared “free” Cable) so the loops could be independently switched and shared between two transceivers.  But, when I suggested this idea to K9AY, he told me that the loops couple strongly with each other unless the unused loop was left floating.  (If this idea actually did work, you could use two transformers on each loop, one in place of the termination, like a reversible Beverage…hmmm…for maximum flexibility.)  Instead, I built the regular control box, with a scrap of CAT5 cable as the control cable.

And, zoomed out…

The loops are 80% of full size due to the amount of space (and wire) I had available.  I terminated them with a 330-ohm resistor, although I’m having a hard time getting a null.  Unfortunately, this is one of the best sites in my yard, yet it has a rusty metal fence (i.e., lots of little diodes on a big antenna) on two sides, a 30-ft mast and my 80-meter vertical on the other two sides.  So, it’s not entirely unexpected that I’m not getting a null.  I suspect that the neighbor would let me install it in his back yard, but I don’t want his landscape guys to hit the cables.  This may become an option.

After conferring with N3OX, I tried putting a 500-ohm potentiometer on the termination point.  But, that didn’t seem to help.  I probably should bring a receiver out to the antenna when I do this…shouldn’t have sold that FT-817.  I checked the potentiometer with my antenna analyzer and it looked pretty reactive.  So, that could have been part of the problem.  For now, I have the 330-ohm resistor in there and get 10ish dB F/B when I’m lucky…

Ethan Miller, K8GU, is a regular contributor to AmateurRadio.com and writes from Maryland, USA. Contact him at [email protected].

Ohio is my home state (hence the W8 callsign) and I thought I’d get on to work a few old friends. I was surprised and pleased to work former co-worker WB8JAY although I’ve changed callsigns since we worked together and I don’t think he recognized me.  We had friends over for dinner, so I only got two and a half hours in.

The big bummer of the Qhio QSO Party is the RTTY contest.  It seems like there’s a lot of bad blood between RTTY and CW ops.  I think a lot of it comes from the fact that they can’t (as a CW op, I consider RTTY ops to be functionally-illiterate at CW because they’d be using CW if they weren’t) copy each other’s signals and therefore treat each other as just another interfering signal.  One man’s signal is another man’s noise, as we like to say in the remote sensing business.

Anyhow, it was a good time and helped me identify some problems with the K9AY loops setup…

                    Ohio QSO Party

Call: K8GU
Operator(s): K8GU
Station: K8GU

Class: Single Op LP
QTH: MD
Operating Time (hrs): 2.5
Radios: SO2R

Summary:
 Band  CW Qs  Ph Qs
--------------------
   80:   24      4
   40:   42     12
   20:
   15:
   10:
--------------------
Total:   66     16  CW Mults = 38  Ph Mults = 11  Total Score = 7,252

Club: Potomac Valley Radio Club

Ethan Miller, K8GU, is a regular contributor to AmateurRadio.com and writes from Maryland, USA. Contact him at [email protected].