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I had two nice DX QSOs tonight on 20 Meters and you could have knocked me over with a feather.  Both ops actually carried on somewhat “normal” QSOs with me!  Ivan EA2NN and Jean F6HFX (who was also QRP, BTW).

Now mind you, due mainly to QSB, these weren’t long rag chews by any means; but we did exchange (besides RST), rig, antenna, weather information – that kind of thing. Wow! DX QSOs that were heckuva lot longer than “TU 599 QRZ?” !!!

Man, that takes me back to my Novice days when QSOs with DX stations were like any other.  In fact, I still have QSLs where in addition to the card, I got letters and photos!

I really, really miss that; and it was nice to get just a teeny taste of that again, tonight.

72 de Larry W2LJ
QRP

On 30 Meters tonight at 00:52 UTC.  Figured out that he was creeping up a few kHz after each station worked. Got in his path, and got in the log!

A good end to a pretty good day!

72 de Larry W2LJ
QRP – When you care to send the very least!

The battery is charging and my Lowepro 150 with the KX3 station is ready and raring to go for FOBB tomorrow.

I sincerely hope the weather is better tomorrow, compared to today.  We’ve had heavy, gray, overcast skies all day.  It was threatening to rain all day and in fact, did. from about 2:00 PM to 3:30 PM or so.  No heavy downpours; but if I were outside operating, it would have been enough to force me indoors.

This afternoon, I was able to break the pileup and work 2012L, the Olympics Special Event station on 17 Meters.  I heard them again tonight on 30 Meters; but their signal was not as strong as on 17 Meters this afternoon.

So I decided to frustrate myself for a while and try to bust the pileup working CY9M on 30 Meters.  The pileup covered a 10 kHz patch of spectrum and after a while, I realized I wasn’t going to cut it this night with 5 Watts.  I have worked St. Paul Island years ago; but never QRP.  They’re there till Wednesday, so I have a few more times to give it a shot.  I have them for DXCC credit already, so if I don’t get them in the log, I won’t lose any sleep.

72 de Larry W2LJ
QRP – When you care to send the very least!

I tell ya!

I had a virtual pipeline into Northern Europe tonight on 20 Meters.  I worked Latvia, Denmark and a whole bunch of Ham friends from European Russia.  I was consistently getting 579 reports, and I will take those at face value.  Whenever I don’t get that automatic “599”, I figure any other report is probably pretty honest.

Hey, 5 Watts to the Butternut and I’m getting 579 from over across all that water that’s separating us?  I’ll take THAT any day of the week! If I wasn’t so tired from work, I’d do the Happy Dance.

I’ve got a bunch of yard work planned for tomorrow, so that I can have Sunday free for Flight of the Bumblebees.  Fresh air, trees, sunshine, wire and a radio.  You can’t beat that with a stick!

Since portable ops seems to be the thing that a lot of folks associate with QRP, I’m attempting to boil the essence of that down into a design for a T-shirt.   This is what I’ve come up with so far:

I’ve put this design on some stuff at Cafe Press.  I think I’ll order myself up a few shirts so that I can wear them while I’m Skeeter hunting (too late for FOBB).  I’ll have to see if I can’t find a real graphic artist who can improve on the execution of my idea – but for now – not too shabby (at least I think so!)

72 de Larry W2LJ
QRP – When you care to send the very least!

I was enjoying a leisurely sweltering summer Sunday afternoon in the back yard with Evan, Sarah, two Adirondack chairs, a kiddie pool, and the schematics for an IC-290A I have on the bench.  I came in to get a glass of water and while I was inside, I checked my e-mail (since I have some equipment for sale).  No prospective buyers, but I did have a message from Sean, KX9X, that he was working aurora on 6 and 2 meters.  I quickly plugged in the 2-meter rig and swung the beam around to the north.  Sure enough, there were raspy aurora signals all over two meters.  I quickly put N9GX (EN60) in the log for my first ever aurora QSO.  This was at least as cool as working K5QE on 2-meter Es with 10 watts.

So, I fumbled around a drawer and pulled out a cable to connect the TS-700S to the computer and fired up Audacity.  I made this interesting recording of KA1ZE/3.  I started out with the beam to the NE (45 degrees azimuth) with a strong auroral buzz on Stan’s signal.  Then I swung the beam around to the NNW direct path (345 degrees azimuth).  I’m in FM19la and he’s in FN01xt, which is exactly 200 miles (322 km) direct path.  On the direct (forward tropo scatter) path, there is still a hint of aurora, but the tone is a bit purer.  When I turn the rotor there is pretty bad hum from a (not unexpected) ground loop.

In order to better visualize a few things, I ran a short-time Fourier transform (this is the actual technical term for a “waterfall”) on the audio file.  I need to code-up a polyphase implementation of the FFT like that used in Rocky, but there are only so many hours in a day.  Click on the image for full-size.

There are lots of interesting details here.  First, you can see that the auroral scatter is both Doppler-shifted (lower in frequency) and Doppler-broadened (spread out from the central frequency) compared with the direct tropo scatter signal.  Second, you can see the ground-loop-induced hum at the low-frequency end.  Auroral backscatter comes from field-aligned plasma density irregularities embedded in the auroral convection flow.  Because most readers will be allergic to the vector math, we make the (somewhat gross) approximation that KA1ZE and I are transmitting and receiving from the same location.  Now, we can take a stab at estimating the flow velocity from the following equation:

Where delta-f is the Doppler shifted frequency (about 300-Hz from these data), c0 is the speed of light (300,000,000 m/s), f is the carrier frequency (144 MHz), and vflow is the flow velocity.  While we’re making approximations, if we round f up to 150 MHz, the twos cancel and we get the Doppler shift of 300 Hz corresponding to a flow velocity of 300 m/s (670 mi/hr).  Fast!  Because it is lower in frequency than the direct signal, we can also infer that the flow was directed away from us.

There you have it!  Science fair projects with your ham radio.

I participated in the QRP-ARCI Summer Homebrew Sprint for only a very little this afternoon.  But thankfully, quality is not defined by quantity, so the QSOs, while few in number were great in fun.

I began by operating on 20 Meters.  The Buddistick was set up with two 11 inch arms, the coil and the super long whip atop the Jeep on the magmount.  With my coil tapped in the normal 20 Meter spot that I am accustomed to, the Autek analyser displayed an SWR of 1.4:1.  I hit the ATU button anyway, for a very short “Brrrrp” and got a 1:1 match.

While on 20 Meters, as I was calling “CQ QRP” for a bit, and much to my surprise I was answered by Fred G4HOM out of Birmingham, England.  He was much louder than the stateside stations that I was working; so I immediately thought “tower and beam”. Nope!  Fred was using his K2 at 10 Watts to a simple wire – propagation, being what it was, favored a QSO between Lake George and Birmingham.  Signal reports were good both ways.

Shortly thereafter, I switched to 40 Meters by undoing the tap from the coil to take advantage of the entire Buddistick coil, and I added two more 11 inch arms.  After a bit of a scare that I won’t go into here (due to my own stupidity), the KX3 had matched the Buddistick to 1.4:1 on 40 Meters. I had several QSOs down around 7.030 MHz, including one with my very good friend Bob, W3BBO.  This was our first QSO while I have been at Lake George.  He had a good 579 signal and gave me a good report as well.

The Buddistick on the magmount, using the vehicle as a ground plane is great combination.  Thanks to W3BBO for getting me to try that.  It works so well that I may just forego using the EFHW wires unless I am on the hiking trail later this week.

Oh, I don’t remember if I mentioned this; but I decided to leave the Lead Acid battery home.  I am going strictly with the Lithium Ion this week.  It held up very well this afternoon.  I never dropped from 5 Watts output throughout the couple of hours of operating time this afternoon, including a few prolonged “CQ QRP” sessions.  I think “The Little Blue Guy” will be quite adequate for my needs.

72 de Larry W2LJ
QRP – When you care to send the very least!

VY2 portable K4SWL!

This year, during our family’s summer holiday, I’m enjoying the hospitality of Prince Edward Island, Canada (hence, the lack of recent posts).  This is our family’s second visit to the maritime island, and each time we’ve been  fortunate to stay at the same off-the-grid cabin on the eastern coast, less than twenty meters from the water.

Of course, staying in an off-grid cabin comes with its radio challenges—namely, supplying power—but also comes with one supreme advantage:  no noise from the typical electrical devices that plague most of our homes. What’s more, this cabin sits on 60 acres, so not even a neighbor’s home appliances disturb my RX ears.

On our previous visit, I brought my (then) Yaesu FT-817, a 9aH gel cell, Micro M+ charge controller, 10W Solarex PV panel, some 300 ohm window line, loads of 22 AWG wire and an LDG ATU.  Unfortunately, I found I had very little time for radio, and propagation was dismal. Indeed, it was during that trip that I discovered my FT-817’s finals had blown, so part of the time I was transmitting less than QRPpppp levels.

This year, since I knew the site well, I came better prepared.

My full 2012 setup consists of the following:

• An Elecraft K2/10
• An Elecraft KX1 (4 band w/built-in ATU)
• Elecraft T1 ATU
• LDG 4:1 Balun
• One 35 aH gel cell
• Two 9.5 aH gel cells
• Two PowerFilm Solar foldable 5 W PV panels
• My radio toolbox with various connectors, crimpers, cutters, wires, caps, multi-tester, etc.
• Enough wire and 300 ohm antenna line to make a couple of wire antennas

So…how’s it all working out? Brilliantly!

In the past few years I’ve done a lot of QRP CW—mainly rag-chews with some buddies on the lower bands. I’ve done less QRP SSB phone. When I first arrived at the cabin and began the process of unpacking, I couldn’t find the jumper cable to attach to my Vibroplex single-lever paddle (the paddle being a Dayton 2012 find, by the way). So, I plugged in a microphone and tuned to the phone portion of the 17 meter band.

Talk about radio fun!

I’ve once again re-discovered the joy of operating QRP SSB. It’s challenging to make those DX contacts and to transmit a long call sign (“VY2 portable K4SWL”) across the ether,  but occasionally the propagation gods smile upon you, and you’re able to participate in a good rag-chew or quick DX with a 57 to 59 signal report.

Being 20 meters from the salt water is a bonus I don’t usually enjoy in my US hermitage. Due to its excellent propagation characteristics, despite my lower power set-up, I have easily worked stations from Russia to North Africa, from  the Caribbean to Japan.   I am thoroughly reveling in it, and the process has re-connected me with my ham radio roots.

As Gunter, VA3GA, told me in a recent Canadian rag-chew, “ham radio holidays give you a chance to explore areas of the hobby you don’t normally think to enjoy.”

So true, Gunter. That’s what I love about ham radio in general– the hobby is so broad, you constantly discover and re-discover favorite elements about it.