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Arghhhh!

With 16 Fox hunts completed, I was 10 for 16.   If I was in the major leagues, that would be a .625 batting average and I’d have mansions, yachts, and sports cars.

But alas, it’s JUST the QRP Fox hunts; and in the last two weeks, I have been shut out!

To make matters worse, tonight’s hunts are the last of the Summer 2012 season, so I will be going out on a really lousy note. I’m doing about as well as Mr. Fox shown above, who got stuck in the fence that surrounds my cousin’s house in Pennsylvania.

A revoltin’ sitchyashun!

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

It was a tough day at work, but ……

I was really lucky tonight and both Foxes in the 20 Meter QRP Fox hunt were loud into New Jersey. I got both their pelts quite quickly and they were both VERY honest 599s into NJ.  This was kind of an unexpected surprise, and a quite welcome one at that. Tuning around 20 Meters a few minutes prior to the hunt, I saw that the ambient noise level on the band is around an S7. I was expecting to be skunked as a result.

But TJ W0EA and John K4BAI have superb ears and both heard me really quickly. And as a side benefit of working them so early, I can now sit here and relax and listen. It’s like listening to a fine piece of music. Both are masters of their frequencies – firing off QSOs with liquid ease.  If not like a symphony, then it’s certainly like a fine ballet; or perhaps akin to enjoying a piece of velvety smooth chocolate.

Bravo to both Foxes. It was not only good working both of you; but a joy to listen to your efforts working others.  Fine codesmanship (new word?) is a wonderful thing.

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

in the 20 Meter Fox hunt tonight.

I worked Dave AB9CA first.  His signal strength was a bit different tonight as he is not home in Alabama, but is vacationing in Wisconsin.  Completing Fox duty while on vacation – now THAT’S dedication!

Paul AA4XX was another matter.  I could barely hear him when I did finally find him.  The K3’s APF (Audio Peak Filter) made all the difference in the world.  At ESP levels when I first heard him, turning on the APF feature insured that when I finally worked him, I was able to hear him answer me back!  It took a barely audible signal and boosted it to a 449 to my poor old ears.

Thanks Elecraft, for a real neat (and usable) feature!

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

I belong to a small group of transmitter hunters here on Long Island. My Elmer originally got me involved by having me navigate for him, and as I learned the technique, I graduated to running my own vehicle along with my better half, KD2CHE. The last few hunts, she has been driving while I watch the signal strength and maps.

Most of the hunters use doppler equipment, from various vendors. Jill and I have had great luck just using our maps, and a good assortment of receivers. We watch the signal strength on my best receiver, a Kenwood TR-9000, and then keep two HTs set to different levels of sensitivity. I hang the HTs in locations so that I can hear them come on. One with no antenna at all, and the other with a mismatched stubby antenna. This combination has gotten us to the bunny box before many of the doppler-equipped cars.

Friday night we had a hunt. The box was to be hidden within 3.5 miles from the Republic Airport in Farmingdale, NY. The box itself is managed by my Elmer, WA2CDL. It’s an old Radio Shack HTX-202, controlled by a custom PIC controller, powered by an external rechargeable battery, all contained in a surplus ammo box. We set out in our new Kia Soul, with me in the back seat. I folded half the back seat so as to have a kind of desk next to me. There I had the TR-9000 and a Dell laptop with the RTL-SDR setup, and Google Maps. Internet was provided by a hotspot on my T-Mobile HD7. We waited.

Unfortunately no one could hear the transmitter. It was mentioned that it might be operating on low power, since it had not been charged. So we drove around till we heard it. Each time it transmitted (30 seconds on, 30 seconds off), we would get a signal, and as we drove in the direction I though it would be in, the signal got weaker. As I plotted all of the vectors around the area where we heard the signal, it seemed that it was simply nowhere. Every time we chased the signal, it got weaker.

Eventually we were given a hint, and once found, I have to admire the location (about 15 feet off of a trail, in a nature preserve, up in a tree). Only some of the doppler-equipped cars were able to locate the box. As it turned out, my eternally fading signal was caused by the low battery. WA2CDL did some measuring after the hunt and told me that it was starting out transmitting just over a Watt, and finishing the 30 second transmission with about 250 Milliwatts. That explained why we always seemed to be heading away from it.

In practical use, what does this mean? If we were trying to find a lost hiker, for example, who had a radio with a dying battery, we would need to take the fading signal into account. I think if I had known that the signal was fading out each time we heard it due to the battery running low, I would have altered my technique. I think if we had simply moved at one minute intervals and marked the signal strength at each location just for the beginning of the transmission, I would have been able to plot the location. I guess I need to ask what the charge on the bunny box battery is in advance next time, or stay put for a couple of transmissions, and see if the signal fades.

How did the RTL-SDR do? Well, if we had steady signal, or if I had known to compensate, it would have been fantastic. I could see the signal before we could hear it, and signal strength was more visual. The battery quit before the end of the hunt though, because of the difficulty in finding the box. I hope to try it again.

The 20 Meter QRP Fox hunt did not pan out tonight.

I heard Arn K0ZK fine for the first half hour; but could not break the pile up. Then his signal faded into oblivion, even with the K3’s APF feature going full bore.

TJ W0EA was just the opposite.  He came up into hearing range in the last half hour; but I couldn’t break the pileup there, either.

Sometimes you’re lucky and sometimes you’re not. Tonight was not a lucky night.

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

Wowsers!

Both 20 Meter foxes worked within the first 10 minutes of the hunt.  That doesn’t occur very often, but when it does it’s gratifying.  The K3 (and the KX3) really makes it easy with those dual VFO knobs.  Hit split, listen on VFO A, dial up the transmit frequency with the VFO B knob and got to town.  No more hitting the A/B button and trying to deal with tuning two separate VFOs with one knob.  Probably a minor thing when you consider it, but oh so convenient!

The Maxpedition padded pouch arrived today and it is perfect!  Fits the KX3 just fine and will protect it from anything else that’s in the knapsack.  Not that there’s really that much in there, but I still worry about something jouncing around and doing damage.  I had the K1 in a “Tupperware” container all those years and it stayed looking mint.  I am sure this padded pouch will do the same for the KX3.

KX3
Antenna wire
Small SLA battery (and small gel cel charger – going to charge off the grid this year)
Lithium Ion battery
Paddles
Earbuds
Autek antenna analyzer (to make setting up the Buddistick easier).
Pad and misc supplies
Wrist rocket

Still, that’s enough to carry along when we go to Lake George later this summer – and for the Flight of the Bumblebees and the Skeeter Hunt as well.

The SLA battery is being taken as a back up only.  If the Lithium Ion performs admirably and gives me a decent amount of radio time between charges, the SLA will stay home in the future.  That would certainly lighten things up.

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

I used my KX3 for the first of the 2012 Summer 20 Meter Fox hunts tonight – and it was great!

Using the K2, you hit the “split” button and you tune each, VFO A and VFO B with the same main tuning knob.  You have to switch back and forth between the two VFOs in order to tune each one.

Not so with the KX3!  Hit “split” and tune VFO A with the main knob and tune VFO B with the smaller, side tuning knob.  No need to keep switching between VFOs to tune each one!  This made things so much easier.

I worked Paul K4FB pretty much right off the bat.  Don NK6A in California was more of a challenge. He was weak, but was picking up in signal strength as the hunt progressed.  Nabbed each pelt using the Butternut vertical.

This was a great way to start the Summer season. Hope it stays this good!

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