Significant Other Update: Logic Board

For a few months, I’ve been playing working on a design for a QRP accessory as a way of becoming familiar with both the arduino platform and homebrewing technique. The basic idea was to put everything except a transceiver in one box, so I couldn’t leave anything behind when operating in the field. I wrote up a design overview when I started, and it is more or less up to date. The schematic isn’t necessarily finalized, but I’ve also posted the most recent version.

The first item I built was a relay board, with latching relays to route the signal through a bank of capacitors and inductors arranged in an L-network, configurable on the fly for low or high-Z. The prototype built on vector board  has nice blinky lights to help me visualize how the relays are switching. I’ve also built a power module and RF module (which senses SWR and reads frequency) on copper clad board.

Over the  New Year’s holiday break, I laid out the logic board, which contains the microprocessor (an ATmega368), a real time clock, LCD display, a piezo buzzer, some buttons, and connectors for paddle input and keyer output. The logic board also sports a USB interface to make my life simpler — I don’t think that will show up in the “final” version, which I envision being laid out as two PCBs: one for control, one for relays.  In the prototype, the two boards are joined by a ten-conductor ribbon cable (with RF connections through shielded cable, not added yet).

The two blank areas on the logic board are where the power module and RF module will be pasted in this prototype. For now, I’m leaving them off and concentrating on the programming aspect of the project. I’ve got some ideas about the global operation of the device and its menu structure, but before I really start any detailed coding, I’d like to look through a few similar projects. An obvious place to start is the full-featured CW keyer described by K3NG at http://radioartisan.wordpress.com/.  I can’t imagine putting all those features into this project, but I think I’ll learn a lot from reading through the code.

Significant Other Power Supply

Initially, I hadn’t given the power supply for the Significant Other project too much thought: I was more focused on the microcontroller, relays, and so on. After going for maximum efficiency with these components, though, it began to annoy me that it would be very wasteful to use an LM7805 regulator to bring lead acid battery voltage (13.8V) down to something that all the chips and relays could use (5V). The LM7805 tosses out the difference in heat, and while at the low currents that I need that doesn’t amount to much power — certainly, not enough to require heat sinks — it goes against the grain of QRP. If you have to haul a battery up a mountain, you’d like it to last as long as it can.

So, I started looking at more efficient (and lighter) means of powering the unit. The design I selected allows for two options. First, two AA batteries will fit inside the unit. Building them into the case assures that I can’t forget them. One of the goals of the SO project is to avoid unpleasant surprises while setting up the station in some remote location.  Since the unit draws so little current, I’d hope that a pair of AA batteries would last quite a while in field use.

Since radios are made to work from 13.8V sources, this is the other acceptable power input. The unit will be built with dual powerpole connectors, so that even if the battery has a single powerpole, it can be plugged into the unit, which effectively replicates the plug, so the radio can also be plugged into the unit. Even if the radio is greedy and pulls power from the battery causing the voltage to sag, the power regulator should cope with anything down to about 7.5V. If the lead acid battery gets that low, it’s probably toast anyhow.

Getting 5V from a 3V source requires a switching power supply, which could be a problem for a radio project since the switching happens at frequencies in the hundreds of kilohertz range. The LT1302-5 chip that I used in this project does not oscillate at a specific frequency, but is variable, and has the potential to produce RFI over a broad range of frequencies.

I followed the datasheet for the 1302 and built a “typical” supply using available parts. Layout is fairly critical, and I did my best to port their suggested PC board layout to manhattan construction. I didn’t have a 20k resistor, so I went with a 22k. I didn’t have any particularly low ESR electrolytics, so I used ones regular ones, etc. It seemed to work anyhow.

For testing purposes, I ran the power supply with a small load next to my FT-187nd, which was connected to a dummy load with cable that was unshielded for several centimeters. Within the ham bands, the only places I heard hash were on 160m and 80m, and even there, it only seemed to be around a couple frequencies. I had originally built the supply with a 10uH commercial inductor wound on a solid core. To limit EMI, I tried replacing this with an equivalent value hand-wound toroid (45 turns of 28Ga on a T50-2). This brought the noise level way down, and I couldn’t hear it when the antenna run was a couple cm away from the toroid. I suppose I could put the power supply in its own metal compartment, but it’s probably enough to just keep the RF path away from it in the layout.

Getting the right combination of bypass and charge-holding capacitors and discharge resistors is a bit empiric, and I’m not sure I did an optimal job, but I got out the voltage that I wanted. When connected to the oscilloscope, I noticed a periodic ~50mV spike that I thought could be a problem down the line for the microprocessor, so I borrowed a low pass filter from a similar project, the power supply in the Norcal 2030. I again had to substitute a bit — I think the filter inductors came out of an old TV. With that filter in place, the voltage is completely smooth as far as I can measure.

The two power supplies are connected by wire “OR”ing them together. The LT1302 senses 5V distal to a Schottky diode, but putting a diode after the higher power supply means that the voltage prior to its diode must be about 5.3 volts. To get that value, I used an LM317 and selected specific resistor values for its feedback network. The LM317 needs a small load to stabilize, so for the prototype, I threw in an indicator LED that lets me know when the high voltage supply is in use.

When the high power supply is active, it pulls up the LT1302 shutdown pin, which turns off the up-conversion. Without all that switching action, the voltage on the toroid side of the diode should be that of the AA batteries. This means that with the higher power supply active, the diode in the lower power supply is reverse biased and no current flows through it. This should mean that the unit can hot-switch between onboard and external power.

The prototype was a little smooshed because I had originally intended to only build the LT1302 circuit on that piece of copper clad board, and then I added the filter, and finally the 13.8V supply.

The real test of this supply will be whether it makes the other components happy.

June mW Sprint

The view west towards mount roseI was sent on fairly short notice to attend a meeting at Lake Tahoe, which is just south of Reno along the California/Nevada border. I had one free evening before the conference, and it just happened to fall on the date of an NAQCC Sprint. I gave serious thought to throwing a wire out the hotel window, but the surrounding mountains called to me. This was not the usual monthly sprint, but the milliwatt version, so I figured that I needed all the help I could get and wanted to take advantage of the elevation.

After some quality time with Google Maps, it looked like Mount Rose was the highest accessible peak in the area. There is a parking lot near the trails that lead to the top of the mountain, but I didn’t think a business suit and dress shoes would fair very well on the gravely slopes. Across the road from the park lot is a campground with picnic tables and tall trees: the ingredients for comfortable field operations. In principle, there is a trail that runs up from the campground to Mount Slide, which, like Mount Rose is a SOTA peak. Again, if I had the right clothing and gear I might have attempted it, but it just wasn’t going to happen this trip. I settled for the 9000+ foot elevation of the campsite.

The view North, down the slopeI tossed a water bottle with a string into a tree, fired up the FT817nd on internal batteries and tuned up with the Hendricks SLT tuner. Before the Sprint, I worked WW0SS in Minnesota on 2.5W. Everything went faster than I had planned, so I laid down on the picnic bench and basked for a while.

I started searching around just a bit before the sprint to get a sense of band conditions. When the sprint started, I alternated between searching and calling. A number of local signals masked the sprint stations for a while, particularly with the poor selectivity of the ft817 (without a filter). I heard quite a few, some of whom were operating at 5W, while others were true milliwatt (less than 1W) stations.

I kept the rig at 0.5W for the entire event, and although I had two small lead acid batteries in the radio bag, I never had to use them. The 817 was running on fumes by the end of the sprint, but I was glad to see that it could make it through two hours of minimal power operation that had included a lot of calling.

All in all, I had six qsos on 20 and 40m. I reported 5 on the NAQCC sprint page because I wasn’t sure the last qso was complete, but I heard afterwards by email from the other station and confirmed that he had, in fact, correctly copied by call at the end of the contest. I think we gave each others 339 for that contact, and I recall that we needed a lot of repeats due to a mixture of summer weather background sounds, QSB and neighboring signals.

I didn’t come close to winning the sprint or even my category, but I enjoyed the scenery and the chance to sign myself as AI4SV/7.

Scoping Out Lambs Knoll Summit

a topographic map showing APRS pings from Lambs KnollThere are a limited number of SOTA peaks within a short drive of Washington, DC, and most of them, particularly the ones with zero activations,  are on private property. After spending a little time with the SOTA database, I found one promising peak less than an hour’s drive away: Lambs Knoll,  W3/WE-007. The most attractive feature is that it is located on the Appalachian Trail, and as a plus, it is line of sight to the VWS repeater.

A Google Map view shows that the trail winds back and forth, with a road running up the middle of it towards a facility on the peak. Even in the aerial photo, it is clear that there are two large log periodic antennas on that site, which turns out to be an FAA facility. By some accounts, this facility started as a Cold War continuity of government site (designated Corkscrew), but presumably, it no longer performs that function.

I drove to Fox’s Gap, along Reno Monument Road. Just off the side of the road, there is a dirt parking lot. The monument to General Reno and some historic markers are also there. The road leading to the FAA site is marked “road may close without notice”, but the metal gate somewhat up the road does not look like it has moved in recent times. The Appalachian Trail crosses Reno Monument Road and runs through the parking lot and into the woods.

The white-blaze trail winds through the woods and eventually rises towards a clearing, where large high tension lines run down the hill. The trail then continues for some distance and forks, with a blue trail running level, and the white trail continuing upward. The path becomes increasingly steep and rocky. On the day that I went, I ran into a good number of hikers on this part of the trail. At one point, the trail crosses the road to the FAA facility and then continues upward. From here, the ascent is not so steep, though, and the trail wraps around the facility.

An aerial shot fo two log periodic antennas within the compound
Log Periodic Antennas from Google Maps

At the point that I thought I’d have line of sight to Tyson’s Corner, Virginia, I was successful in hitting the 70cm VWS repeater with my handheld at 5W using my Comet antenna. From that same position (the red dot on the above topopgraphic map), I was able to get acknowledgement to APRS squirts from three digipeaters.

After climbing back down, I drove the access road up to the facility. It is a nicely paved road and winds up the hill. At the point where the power lines cross the road, a fence runs along each side of the road, blocking access to the cleared strip of land under the lines. There are gates in the fences, but they are closed. The Appalachian Trail crosses the road higher up, with some minor signage to indicate the intersection.

At the top of the hill, the road splits with the main facility to the right and an emergency vehicle entrance straight ahead. I did not approach the main entrance, but it looks to be  a remotely-controlled electronic fence, probably with a card reader and some cameras. From the front of the facility, I could not see the log periodic or other recognizable antennas.

To reduce the climb time, one could probably drive up the road, drop operators off, and park the car back near the Reno Monument. Park the car along the side of the road is not a good option. The weakness of this plan is that whomever drove the car either has to wait in the parking lot for a “pick us up” call, or has to hike the whole trail — but it would allow the operators to get into position more quickly and have a longer operating day.

There is no indicate of hours of operation along the trail — it is not a park that closes at night, but it is probably best to tackle it in the day time. There may be some sort of camping along the blue trail, although I’d just drive out for the day.

Sugarloaf & QRPTTF

French Bread Loaf, Copyright © 2004 David MonniauxThe weekend was the QRP TTF event, and this year’s rules favored stations that did double duty as SOTA (summits on the air) stations. The Vienna Wireless Society made its annual pilgrimage to Glyndon Park in Vienna, Virginia, and I was sorely tempted to hang out there and partake in the barbecuage. However, the SOTA bug still had its fangs in me, so I headed to Sugarloaf Mountain in Maryland, or in SOTA terms peak W3/CR-003.

Sugarloaf Mountain is in private hands, but the land owners have opened it up for public use. The lone peak rises prominently above the surrounding farmland. Access is not bad at all — there is a road that runs up the mountain, with three parking lots providing views to the West, East, and South (towards the Potomac River). I had downloaded a trail map from the Sugarloaf website and decided to approach the summit from the Western Overlook.

The path up is well maintained, and consists predominantly of stone stairs. There’s a handrail at the steepest parts. Little kids were running up and down the stairs, impatient for the adults. I took a few breathers on the way up, but it wasn’t too bad a climb, even with equipment.

When I got up there, I found a slanting rock at the very top and made it my base. Being on the edge of the Washington Metro area (and perhaps the Southern edge of the Baltimore region), there were lots of visitors, some who watched with amusement as I tossed soda bottles with strings into the trees, and others who asked me questions about the hobby.

I set up the 20m station first, a TenTec 1320, which I had built from a kit three years ago, plus a longwire antenna and the Hendricks SLT+ tuner. The usual. Later in the day, I put up a longer wire antenna and brought out the 40m Rockmite.

Once at the top, I checked into the club via the 2m repeater, but found that the 440 was quieter. I had brought along a homemade yagi that I had used on the FM sats last year; I’m not sure it helped that much. Ian, N0IMB spotted me on the SOTA site, and that led to a short flurry of contacts on 20m.

Shortly after the first contact, there was a brief hail storm with tiny pebbly hail. I covered everything in the plastic that I had brought along, but luckily the storm did not convert to rain, and weather remained cool but clear for the rest of the day.

I set up my VX-8GR hand held on the summit, and used it to post my current frequency and coordinates via APRS. I heard confirmation tones from at least three digipeaters, but I’m not sure if anyone actually used this information to find me on HF.

My first contact, W7CNL was nice enough to spot me on 20m, and later N4EX did the same on 40. I was pleased to work three members of the Vienna Wireless Society, including Kevin WB0POH, who was operating the club station K4HTA at Glyndon Park. He later told me that he was trying out Tom N4ZPT’s new KX3. The signal was paperthin and went in and out, but we managed to complete the call. Later, I had a clear QSO with Jake, N4UY who was using an attic antenna and putting out 2W on a GM20 transceiver.  Finally, I worked Ray Albers, K2HYD from his home in North Carolina on the Rockmite.

My longest distance contact was G4ELZ Jeff from the UK. The rest of the 20m contacts were west coast US, TX/OK, or Florida. The total for the day was 22 worked on 20m QRP, and four more on 40m QRPp.  Looking over the log, I worked the following states: NJ, OH, NC, PA, NY, AL, OK, TX, FL, MI, MD, VA, OR and ID. Florida was disproportionately represented in the log because I worked a few FQP stations. I also worked a number of QRPTTF stations, plus one summit-to-summit contact with AA5CK on W5/QA-008 in Oklahoma.

I was glad to get the rockmite out for some exercise. I’ve now worked about 30 station with it, corresponding to six states. It was a rough ride with the rockmite due to lack of selectivity, and I appreciate the work of the other stations in pullings its signal out.

I stopped working on 40m when the clouds grew dark, and on my way through the parking lot back to the car, the storm broke. I avoided getting drenched by about ten minutes.

Signal Mountain Activated

some rocks
The peak of signal mountain. Photo taken from our operating position, looking north.

Our visit to Signal Mountain, Virginia was successful, and summit W4/SH-049 has been activated for the first time (and perhaps the only time for the forseeable future).  We made a total of 19 QSOs, which we thought was reasonable for our first  SOTA activiation (and not really knowing what we were doing).

On the morning of April 14, 2012, I met up with Ian N0IMB and we drove out to the site. A Google Map query for “Signal Mountain, Virginia” puts an arrow right on the summit, and there is a road all the way to the top. That road is silky smooth, but the residential road that leads to it is a couple miles of gravel and dust.  We drove in and parked about just after the sharp bend in the road. According to the terrain feature on Google Maps, this put us a couple hundred feet from the summit.

I unpacked Dolly, who in this case was not a cloned sheep, but an old furniture dolly that I have used since college every time I change dwellings. Most of the equipment went into a milk crate that was bungeed to Dolly. Given the road access, we didn’t pack particularly lightly — folding camp chairs, some folding TV tables to work on, and a couple bags of equipment and snacks. As peaks go, this was a pleasure cruise.

I led Dolly up the slope, pulling on her leash, and Ian lugged the rest of the equipment. The road continues past the peak to a fenced government facility, but we stopped at the peak and headed eastward up a gentle slope into the woods. When we got to the actual stony peak, Ian found a nice place to erect the buddipole tripod, and I set up the radios.

The buddy pole went up quickly, and we played with the counterpoise until we arrived at a 1:1 SWR on 20m (Ian made me take a picture of the MFJ tuner as evidence!). We tuned around on 20m and quickly came to the realization that our stated operating frequency was just wishful thinking. The band was humming from one end to the other with QSO Party activity. We tried working a few of the NM QSOP stations, but although they were thundering in, they could not hear the 5W the Yaesu 817d was putting out. CW was a bit better, but the stock filtering on the 817d was relatively wide.

We decided that before we really set up shop, it would make more sense to put the antenna on 17m and see if we couldn’t get out better without all the background chatter. The buddipole retuned quickly, and we were soon on the air. Our first contact was Mike KE5AKL from NM, which is quite fitting since he was the first station that I had worked as a chaser, the day before.

After that, we worked a succession of stations, some with callsigns that I recognized. The TenTec 1320 sitting next to me in my bag had, for instance, been modified according to instructions that I had found on the website of our third contact, Scott W5ESE. Two contacts, Bob WB4KLJ and John AF4PD, were from our local club, the Vienna Wireless Society, and must have been working us direct from 25 miles to the east.   Jonathan AK4NL was also a very close contact, being located on Bull Run Mountain. Our stateside contacts on 17m included VA, CO, ID, NM, TX and OR.

We were very glad to make contacts with England (G4OBK), Scotland (MM0USU), and Germany (DJ5AV).  We are particularly grateful to Phil G4OBK, who stayed on frequency after working us, followed us up frequency when we had QRM, and warned off a station who was about to transmit on top of us. The other station likely could not hear our puny signal, but could copy the solid transmission coming from across the pond.

Around three in the afternoon, we switched to 40m. It was a little more involved to move the buddipole to 40m, but we finally got a reasonable match.  Predictably, on daytime 40m, we worked primarily the US east coast: PA, VA, MA, NJ, and NY.

We had intended to work until about 6 pm, but stopped early, because we were informed that the access road was being closed up at 4 pm. In talking with some guys from the facility, who turned out to be communications professionals, we learned that the facility houses some sensitive radio equipment. Although our signals did not cause any sort of interference, we agreed that we would recommend that others not work this summit, even at QRP levels.

We learned a number of lessons from our first activation, and here are the ones I can remember:

  • It is okay, indeed encouraged, to self-spot. We had so-so cellular connectivity, but in the future, getting the word out will include spotting on sotawatch, qrpspots, and via twitter.
  • Less equipment is better. We did not use the G5RV or the TenTec 1320; while there is some value in being prepared and having redundant equipment, if I had to carry the extra gear up a more challenging slope, I would not have been a happy camper.
  • The WARC bands are your friends. Ian and I both like 17 meters. If I had to pick one band, that would be it.
  • We had originally not planned to work 40m in the middle of the day, but the east coast US hams were grateful to hear us, so I’d factor that in next time, and try to split operation between local and more DX stations.
  • Our pre-posted operating frequencies went right out the window. Also, we had too many of them. It probably isn’t practical to work more than a couple bands on a given activation.
  • 5W on voice is difficult, but still worth it – when we did connect wth other stations, most of the time we received fairly good reports, and on our end, the other stations were loud.
  • For CW, I’d prefer a radio with better filtering (or maybe a modded 817).

 

March contesting

I had a great run in the March NAQCC sprint, a two hour QRP CW sprint that encourages the use of straight keys.  I am surprised (but pleased) to see that I took the top position in the W4 division for simple wire antennas. I think this speaks to good conditions where I was operating, luck in hitting so many multipliers, and the absence of other stations that typically score very well (K4ORD and others).  I know that several of the contestors, e.g., K4BAI, were already preparing for their CQ WW WPX runs,  so that might explain the absence of some of the regulars.

Speaking of CQ WW WPX…

S line station, tuner, swr meter, paper log
Upper book: antenna tuner settings; lower book: the contest log.

With a 100W station and a couple fixed antennas in my attic, I’m not much of a threat to the CQ WW WPX establishment, but I thought I’d give it an “old school” try this time.  Instead of working the contest with my workhorse Kenwood TS-450, I fired up the Collins S-line station. With the recently acquired Heathkit SA-2040 antenna tuner and the TenTec 1225 SWR meter to keep an eye on things, I had enough flexibility to work all the bands.

I had a number of other things to do over the weekend, so I put in about four hours in the contest. I went full manual — not even computer logging, just some sheets of graph paper. I worked 136 contacts, three of which were dupes (the paper-only method leaves something to be desired in terms of real time dupe checking).

According to my log, I worked the following DXCC entitites: Aland Island (Finland), Asiatic Russia, Belarus, Belgium, Bonaire, Curacao, Bosnia-Herzegovina, Brazil, Bulgaria, Canada,Canary Islands, Croatia, Cuba, Cyprus, Czech Republic, Dominican Republic, England, Estonia, France, Germany, Hungary, Italy, Latvia, Lithuania, Luxembourg, Madeira Island, Montenegro, Morocco, Netherlands, Norway, Poland, Portugal, Serbia, Slovak Republic, Slovenia, Spain, Sweden, Switzerland, Ukraine, the USA, Virgin Islands, and Wales.

The rigs worked flawlessly, and the warm sound was pleasant. I did a lot of repeating, and surely my signal was not very strong compared to most, but it got the job done.

Contests 2011

It’s still barely the first week in January, so I’m going to do a little retrospective on contests entered in 2011. Some contests I just hear on the air and jump into (particularly QSO parties), others I obsessively prepare for over several months (like the Indiana QSO Party, Operation Sizzling Pork). Usually, though, I don’t think much about them when they are over.

Not included in my retrospective are some of the contests that I participated in as a member of VWS, e.g., Field Day, and the NAQP SSB and CW.

Except for some of the QRP sprints, most contests take at least a few months to turn around results, which is somewhat puzzling considering that log submission is almost universally electronic. So, here’s the run down, based  on a quick scan of outgoing emails with logs attached. Unless otherwise stated, I entered as single operator, low power, CW only:

MN QSOP 1st VA station in category
BC QSOP Hey — I was one of only 20 outside BC in the contest
CQ WW WPX RTTY No way I was going to do well in this contest, but I made some contacts at least
2011 ARRL International DX CW I gave up trying to find the results on the ARRL website
VA QSOP I worked part of this contest with the VWS club, but them went home in the evening. I ended up getting a certificate as 1st place station in Fairfax, County, Virginia. Not bad for a half day’s work.
FL QSOP I recall this one — I was on the back porch with a QRP rig and only worked a couple, but had fun.
IN QSOP Well, I’ve certainly written enough about Operation Sizzling Pork on this blog, but it was the highlight of the year for me. I had fun preparing, during the contest, and even afterwards in compiling the scores. We placed second in the category of multioperator, multistation. Our station ran low power and worked both CW and SSB.
CQ WW WPX CW I think I was camping an entered this one QRP. A bit frustrating because only one out ten heard me, but after a few hours, I had a decent number of international contacts on 5W with an improvised antenna
REF The French amateur radio league contest. I placed 20th among US operators – pas mal.
HA DX I always enjoy the Hungarian contest. I came in at #278, but I still like the way they run this contest, communicate with log submitters, post the results, etc.
RAC Canada Day The RAC contest is also a favorite, although the results are not broken down geographically.
IARU HF The International Amateur Radio Union contest was fun in that I made contact with a number of headquarters stations and added a few new countries to my list. The results have not been posted yet.
The MARAC US Country QSO Party I had just installed the rig in my car and I made exactly one SSB QSO in this contest, but one is better than none. I’d like to try this again next year, but working CW.
Maryland/DC QSOP I worked this one with the NIH Amateur Radio Club, so it wasn’t an individual effort. We ranked second as club station in Maryland.
TN QSO Party I always seem to have great propagation in TN, so I worked this one QRP. I came in as the #3 out of state QRP operator, so I was very happy.
Arkansas QSO Party Luckily, they break the scores down by state, and as not many others from Virginia entered, I was the top VA station. It’s always worth sending in a score.
WAE SSB Again, I don’t have a chance in this sort of contest, but I did finally figure out how the whole QTC thing works.
OSPOTA I heard a random call for the Ohio State Parks on the Air Contest and dialed around to catch a few more. I came in #10 for stations outside Ohio.
Arizona QSO Party I had one QRP CW contact while I was in Montreal for a conference. Results aren’t up, but looking at logs received, I can guarantee that I was the only VE2 entrant!
NY QSO Party I usually have good connections to New York during the QRP sprints, so I also worked this contest QRP. I think I did pretty well, because I recall crossing a bunch of counties off my list, but results are not yet posted.
IL QSO Party I came in 49th in this short contest
ARCI Hoot Owl I worked this contest in the dark with a 20m rockmite, a longwire antenna and some mosquito spray. I had a great time and my score was roughly in the middle of the range, largely thanks to the bonus for working portable. I’d like to do more ARCI events this year.
NAQCC Sprint Hands down my favorite sprint. I have slowly worked my way up, both in terms of operating skill and antennas. I look forward to this every month, but schedules don’t always work out.
Spartan Sprint I also enjoy the SS, and have been working on trimming the station down from a chubby to a skinny. I can now operate pretty skinny, but only on one band at a time.

QRV à Montréal

Graffitied picnic table with Tentec 1320, Winkeyer, Palm Paddles, and wiresI’m up in Montreal for a conference on rare diseases and the agenda is pretty tight. However, after meetings ended this afternoon, I scampered northwards from the hotel, up past McGill University, heading for the high ground of Mont Royal Park. The downtown is a canyon of metal buildings, but ground slopes up as you head north, away from the river.  I actually didn’t climb to the top of Mont Royal — I stopped when I found a picnic table about half way up. The top of the hill sports a bunch of antennas, and I thought it best to keep some distance from other radiators (and the giant metal crucifix at the top of the hill. I’m not sure if it radiates, but I didn’t want to go near it either).

My picnic table was already decorated by the local artisans with their initials and names, so I knew it was something of which they were proud. Conveniently, but not too surprisingly, there was a tall maple tree nearby, and the antenna went up in one throw (because no one was looking). I set up the TenTec 1320, the Hendricks SLT+ tuner, and my Swedish lead-acid battery. I should mention that this time, TSA had no problem with lead acid batteries. I guess that was last week’s policy.

I was operating as “AI4SV/VE2”, which is a quite a mouth [fist] full. The first station I worked was Ivan, IZ4DLR, who gave me a 569. He was running 200W into a 3 element beam. I informed him that his beam was performing very well both coming and going. My next contact was with Stan, N7OC, who was also running 5W in Custer, Washington. I was pretty happy with the distances — Italy and Washington within a few minute of each other. I had a few more contacts, working Virginia, South Carolina, and even one station in the Arizona QSO Party. I hope I was a multiplier for him. I’ll have to think about what station category I’d be in that contest — Single op, single transmitter, single band, cw only, qrp, portable, Candian.

A basket of friesOn the way back, I stopped by a restaurant advertising itself as a transplanted Belgian fritérie. It was nice to see a place that served different sauces with their fries, but the fries themselves were a bit overcooked, and the sauce andalouse could have been a bit spicier. Nonetheless, their beer was good, and they had hockey on a big TV, so it was still worth the trip.

Visiting with Swedish Hams

Continuing the visit to Sweden from the previous post

Saturday morning, Kjell pulled his car up to the hotel, and we took off towards the village of Dalarö. Along the way, he showed me his mobile set-up, which included a Kenwood mobile rig set up for ARPS and an associated GPS unit.  As we drove, he gave me a brief run down of the history of the area and what was going on in terms of ham radio activity.

A scan of a business card from the restaurant SaltskutanAfter about fifteen minutes, we arrived at quiet village on the water (I realize “on the water” may not be very informative when it comes to an archipelago). Kjell mentioned that this particular village is popular among the well-off who maintain summer cottages there. One of the stops on our tour of this town was the tiny sea cabin that belonged to Anders Franzen, the archeologist who discovered the 17th Century wooden ship Vasa, preserved in the brackish waters of the Baltic.  For lunch, he took me to a restaurant in the building that at one time has served as the customs house (tullhuset) for ships bring in goods. The meal was very tasty and involved a meat similar to bacon, but thicker, served over what I think was a potato pancake.

A photographic qsl card for club station sk0qoAfter eating, we continued the trip towards the club station, SK0QO. The station is located on the Gålö peninsula, which until fairly recent times was an island. The station has been there for about a year, and the club owns the building, which is on the edge of some farm land. Driving up to the station, I noticed that they had a number of dipole antennas strung up, a vertical, and I think even a discone.

A number of hams were present at the station, some on the air, and others preparing for their annual hamfest, which will occur next week. I learned that the club is among the largest in Sweden, and that they frequently take part in contests.

The club house has a main room with a central table and a corner fireplace. One rig was set up on the table for QRP voice. I could hear some morse code sounds coming from behind the door to a side room. I peeked in a found a few operators on an IC-7000. It turns out that one of the operators was Jonas, with whom I had a CW QSO the previous day. He filled out a QSL card on the spot, and handed it to me, which is about the fastest turn around time I think I will ever have for a “dx” QSL. Afterwards, Kjell snapped a photo of some of us out in front of the station.

Photo with some Swedish hams in front of the SK0QO club stationJonas explained that on the previous day, by the time our qso took place, he had been operating for a few hours, mostly in English, and was relieved to hear a Swedish call — which turned out to be me.  I was relieved to learn that he had, in fact, sent to me in Swedish and that there wasn’t something wrong with my listening skills.

Also in the photo are Olaf, who oversees the station itself, and Carin, who is working on her sea captain’s license, and was also sending morse code that day.

After a nice time chatting with the hams at the stations (all of whom spoke excellent English), Kjell took me to visit his friend Sven, an extraordinary homebrew experimenter who definitely has “the knack”.

Sven is interested in monitoring the planet’s Schuman resonance, an extremely low frequency (i.e., 7 Hz fundamental) signal, and he has gone to extreme lengths to build his own equipment to do so. It is well worth reading Kjell’s excellent article on Sven’s efforts. What is amazing is that Sven has built equipment sensitive enough to isolate these tenuous signals, and that he does it in a populated area, where radiation from power lines, heating systems, and every other domestic electrical device complicates the situation.

This was no small task, and Sven is willing to put in an extreme effort. He has, for example, entirely cut AC power to the second floor of his house, where he has built a magnetic loop antenna the size of an upright piano. The coil itself is suspended by elastic supports and the ceiling and walls are covered in anechoic material to avoid acoustic vibration of the coil. He has gone so far as to “tune” the room itself, by positioning baffles to null out the room’s intrinsic acoustic resonances. No half measures there.

a map showing the route driven earlier in the day as reported by ARPSAfter all of this, I thanked Kjell for being an amazing host and for extending such a warm welcome to a visiting ham. We agreed to set up a sked at some point, and I hope we’re able to meet on the air in the future. Later that evening, Kjell sent me a link to our APRS tracked route from earlier in the day.

I was able to get on the air again that evening from the hotel room using a longwire thrown out my 8th floor window. Even with this very suboptimal antenna arrangement, I worked two stations on 20m, one in Wales, and one in the Czech Republic. For kicks, I did try the rockmite on 40m. I didn’t get any replies, but I did at least show up on a Netherlands reverse beacon monitoring station at 8dB above noise.

On Sunday, I again hiked into the woods behind the hotel, spent about two hours on the air, and worked eight stations (in Russia, Germany, Italy, Slovenia and England). I turns out that I was lucky, as not too long afterwards, a series of solar events disturbed the ionosphere for a few days. In all, I worked 14 stations and 9 DXCC entities with my 5w 20m transceiver.