W5MPZ Field Day!

I had the honor of joining the Sandia National Labs Amateur Radio Club’s (W5MPZ) Field Day activities. The team consisted of 20 or so people who sought out this ham radio haven of a campground in the north edge of the Zuni Mountains near Gallup, NM. There was a lot of open space, many places to set up tents, and best of all, tall pine trees to hoist antennas. 

Our station was active for almost 24 hours, minus a lull at about 1:10 am Sunday morning. Our backup arrived at around 2 am, which included Brian (N5ZGT, Rocky Mtn Division Director), who just got back from a Turks and Caicos island vacation (or DXPedition, you might say), and Scott (N5SQR) who worked PSK and SSB.

Setup and Operation 

Beam

Before I arrived, the triband TA-33 beam was set up on poles over a center stake pounded in the ground.  It was rotatable by simply spinning the mast. The guy ropes were left slightly loose so that it’s rotatable, and they spool and tighten around the mast when you rotate it. They tighten just enough to cover the northerly half of the horizon without much added tension.
TA-33 with the 80m windom in the background
The beam was top. It was fun but frustrating to hear a section you haven’t worked on the back side of the beam, run out, turn it, and discover the station disappeared completely. 

Dipoles

The 40-50′ tall Ponderosa Pines were more than adequate antenna masts. Our method of pulling lines over the trees was with a spud gun — a PVC contraption with an air tank, electric valve, and 3′ long barrel which shoots a PVC slug with fishing line attached to it.

On my first shot, I got over this tree and the line sat perfectly on the brown number post.

The perfect shot.
After shooting the line over the tree, we’d tie and pull thin twine to it, then pull heavier rope to attach to the antenna. Repeat for the other side, and hoist away.
Old Glory on our 80/40 trap dipole
We had an 80/40 m resonant trap dipole on one tree, and the other was an 80m Carolina Windom. They were both oriented for maximun E-W reception and did a great job.

RPi camera

 A nifty setup was a motion sensitive camera connected to a Raspberry Pi. It snaps photos when it sees movement, and stores them on an SD card and posts them to our LAN. The router was for the LAN for syncing our logs.

Operation

We were 2A, so we had 2 stations on the air, all supported by batteries. We operated SSB, CW and PSK31.

 

Scott, N5SQR working SSB
After setting up the last dipole, we began calling CQ on a clear frequency a few minutes before Field Day start to secure our spot in chaos. Once it began, signals filled the band but we had an interestingly slow time throughout the day. We shifted operators on the top of the hour, usually having a logger and radio op on each station. We made around 150 QSOs on SSB, CW and PSK31 before sunset.

No field day station is without its problems. We were lucky to only have minor issues, like the logs not syncing or the digital station computer interface not working. These were easily and promptly fixed. Everything else (except for the band conditions) was perfect.

Our ops came from all areas of the hobby. Brian, for example, just got back from Turks & Caicos, and worked hordes of stations from VP5-land, while Seth never worked a contest before being a technician.

Brian and Seth teaming up to send Radiograms for bonus points
Seth taking names and gettign mults on the voice station

Seth quickly caught the Field Day bug and worked the 12-1am shift by storm, and eventually took both working and logging on the voice station on solo.

It was very cool to see him warm up to the air and get excited to work stations. It reminds me of my first Field Day, where I was thrown into the action and started racking up QSOs as fast as any other operator after only having a few hours to figure it out.

Seth also worked PSK31 after showing him the macros. He first though it was going to be too difficult, like CW, but was amazed at how simple it is.
The county sheriff got the call from us to visit the site. He visited on his regular patrol and we explained our operations to him. He was certainly impressed.

A visitation by the local sheriff

  Satellites

The Arrow LEO-SAT yagi and other antennas in the background

Sat Station Setup — FT-817 for RX and an 897 for TX

My job at W5MPZ was to bring a satellite QSO to the log for an extra 100 points. Unfortunately, this didn’t happen.

I had several attempts at SO-51 (the only FM satellite), VO-52, FO-29 and the zombie AO-7 (all SSB/CW transponders). I had most luck with the SSB satellites but had problems in being able to hear myself.

To work the SSB satellites (all but SO-51) you need to know where your signal ends up after it gets translated to the other band. For example, FO-29’s uplink band is 145.8-145.9 MHz, while the downlink is 435.9-436.0 MHz. One would think the 100 kHz passband would be linearly related, e.g. I transmit on 145.85, and hear myself on 435.95, but this isn’t the case. The doppler effect causes the frequency to differ by up to 500 kHz on UHF, so you need a way of calculating doppler, or simply finding yourself.

My technique was to spin a carrier through the passband until I heard it on the downlink, and switch to SSB to call CQ and tune into myself. Upon the switch, I lost myself.

I figured out the solution on the last pass of the weekend. The FT-897 has a feature in SSB mode that allows you to send CW at your tone frequency. So if I’m on 145.000 and have a 700 HZ CW pitch, it would send it at 145.000.70 MHz. Therefore, if you were tuned into 145 MHz on another rig, you’d hear that same pitch. All I had to do was zerobeat on the flipped bandpass, and call away. I finally heard myself repeated by the satellite, but didn’t have any replies within the last 5 minutes of the pass.

It was worth the effort (and in hindsight I should have just worked the ISS’s message system via packet)!

Summary

The underlying point of Field Day (aside from preparedness) is to have fun. W5MPZ did exactly that. Our support team of family members kept us well fed, watered, sheltered, and our batteries charged. One could not ask for a better place to set up and operate from, and the weather (despite being cold in the mornings) was amazing – not having wind and the 100°F temperatures to contend with was a huge relief.

I’m not sure of the final QSO count or score, but we only missed a few sections in Canada – NT, MAR, and ONN I believe — like we expected. Field Day isn’t a contest, so the score isn’t important to me or any of the operators aside from personal club goals and whatnot, so that wasn’t a worry. What matters is the coming together of like-minded people to getaway from the daily grind, have a ton of fun, share stories, and work stations.


Sterling Coffey, NØSSC, is a regular contributor to AmateurRadio.com. He is ARRL Youth Editor and an electrical engineering student at Missouri S&T. Contact him at [email protected].

An Aaargh! moment

Some of you may have received an invitation to join my LinkedIn network from me today. To those who accepted, thank you. To those who found the invitation unwelcome, I apologize.

It was not my intention to spam you in any way. Unfortunately I didn’t look carefully enough at what was displayed so that instead of emailing just those whom I had painstakingly selected from the list, the invitations went to all of the hundreds of addresses in my Gmail contacts list.

It was a real Aargh! moment, but by the time I had uttered the exclamation it was too late! Judging by all the invitations I have received in the past from people I don’t remember, I don’t think I am the first person to have done this.


Julian Moss, G4ILO, is a regular contributor to AmateurRadio.com and writes from Cumbria, England. Contact him at [email protected].

QRP Key?

There are things in our daily lives that we acknowledge as being true, even though technically they aren't. There are all sorts of phrases that just don't make sense, but we say them all the time. I've played a lot of baseball and I am a big fan. There are phrases in that sport that confound logic. For example, when your team needs a rally and the batter at the plate takes a big swing and misses, how many times have you heard the phrase, "Okay , we don't need a homerun, just get on base.......really, you don't need a homerun? When, in any baseball game, do you not need a homerun? Yet, its a common phrase and if you are a baseball fan, I'm sure you've said it. Or, you yell at the pitcher who is having control problems, "just throw strikes". Now do  you really think the pitcher is thinking anything different? Do you think he is intentionally walking the opposing batters just to irritate the crowd? Or if you are a basketball fan, "They need to quit shooting so many three pointers". What you really mean is that you wish they would quit missing three pointers. How can you make a three pointer, if you don't shoot it? For the non US readers, I'm sure there are similar phrases in other sports that confound logic when you literally interpret the phrase.

So, that brings me to the term "QRP Key". We've all seen it, an advertisment or solicitation for a small morse key or paddle. Phrases like, "a nice compact morse key suitable for QRP operation" or the key is "QRP" sized. Now this brings a few questions to my mind. QRP in the technical sense means low power, so can you only sent 5 watts with this key?  I suppose QRP operators are not suppose to use full sized keys or bugs as obviously you wouldn't be QRP any longer. Does using a full size key boost your signal? Does this mean that this small key cannot be used for QRO operation, will this "QRP key" degrade my high power signal? What are the specifications for a "QRP" key?

What about the QRPp operator? What are they to do for an appropriate key? Surely if you have QRP keys, QRPp keys must be even smaller and only those with very small hands can be successful, QRPp operators.

All of this is very confusing from a literal sense. If I am new to QRP must I get a new key? Dare I mix my QRO and QRP paddles or will I have problems if I do? I have this nice desk paddle that I love, but surely I couldn't use it with my KX3, or could I? Since the KX3 is larger than my KX1 maybe I could use my big paddle with it, but definitely not with the KX1. Surely you understand the dilemmas here. What to do?

Now, a few more descriptive terms for these small keys is the term "portable", "small "or the phrase "for field use". These terms, from a literal pespective, seem to make more sense. Certainly these "QRP keys" make sense for the QRO operator on an expediton who doesn't want to carry around a heavy key. Begali uses the term "adventure key", which seems to be self explanatory and doesn't invoke a QRP only use.

So, be careful and use your own judgement on when and where to use your QRP key, someone may be watching.

Mike Crownover, AD5A, is a regular contributor to AmateurRadio.com and writes from Texas, USA. Contact him at [email protected].

Any Guesses?

Guess the rude noise on 6m I recorded a little while ago but forgot all about

Guess the din

 

 


Alex Hill, G7KSE, is a regular contributor to AmateurRadio.com and writes from Cumbria, UK. Contact him at [email protected].

My first ever field day is over…………

The Saturday afternoon sky
Not sure why but I have never taken part in any field day, I can remember there have been some years were I was busy. I have often seen field day setups as I drove from here to there but as I said I have never been involved in one. Well 2013 field day was my first I was not with a group from a club but did it on my own. Not because I'm not into clubs but was not sure if this year I would be busy doing other things as Julie's
Saturdays operating position
relatives are in from England. It turned out I was able to get some time in on Saturday and Sunday and I had a blast. I was operating search and pounce and was using my KX3 on battery power only. I did bring along my spare battery but did not have to use it either day. My antenna was a mobile whip and I stayed on 20m for the contest. I was reading on twitter how 10m and 15m were dead. Funny thing too I was also reading other twitter posts of how this was a field day with very little action on the bands. I found things to be very busy and I was always able to make a contact....well hear them but maybe not make the contact. It sure was a change to not have my PC with me during a contest. I was hand writing my log and also having to run down my contact list to see if I have worked the station already. I did get a few "worked B4" but that was due to the fact I was not able to see them in my log sheets. At the start of the contest I was getting asked to repeat my category almost every contact!! That told me I was for sure messing something up, turns out I was
Sundays spot...lunch time
Sundays weather
sending B1 and not 1B as a category....sorry to all those who I threw off at the start of the contest. Once I got the exchange sorted out all was going very well. The weather on Saturday was touch and go there was very severe weather clouds moving overhead all the time. I must say for the time I was out on Saturday I did not have rain at all. On Sunday it was once again very humid and HOT HOT!! The nice thing about Sunday was the bad weather seemed to had taken a good long break. On Sunday I went to a different spot, it was a nice park just north of me. I did have some folks stop by to see what I was up too but none hung around to long. When the contest was over I was on the air for only a total of 4 hours and I made 50 contacts CW only. I was operating at 4 watts on the internal batteries of the KX3.  I had a nice time and was able to give the Elecraft KX3 a good workout. So as I said this was my first ever Field day and I will for sure be putting this contest in the calender for next year.

Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].

Updated RTL1090 – more planes on your SDR based virtual radar

A few days ago, I noticed some mention about a new version of the RTL1090 program. This is Windows software which you can run on your PC in conjunction with the RTL-SDR dongles and plot ADS-B transmissions from aircraft. For a bit more detail, please see my earlier blog post

Yesterday evening I downloaded the program and installed it, which was straightforward. My first impression was that I was seeing more aircraft than I had before. With the small antenna provided with the dongle on the desk in front of me, I was seeing aircraft further out than I had done before with the RTL1090 software. Testing again this morning, the same seems true.

As well as seemingly being a bit more sensitive, the new version of the RTL1090 software provides a bit more information in the List view abut messages which have been decoded, which might be useful or interesting (or encouraging) if you have not yet got the link to a plotting program working yet.

It’s possible that the plotting of more distant aircraft is due to tropospheric conditions at 1090Mhz, but I suspect not! 

Download the new version of RTL1090 here

The other thing that looks quite interesting is that the team have produced a program to interface with RTL1090 and plot aircraft on a map. It’s called Globe-S and can be found here – I haven’t yet installed it, but it looks a nice interface.


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

Where did the Stations Go ?

The DX seems to have disappeared here in the valley; it left just a mysteriously as it came. There didn’t appear to be any reason why I captured it, in the first place, around the first of the year, and there doesn’t seem to be any reason it left; but I’m hearing very little here in the valley.

Just as a precaution, I’ve submitted a work order (I’m not holding my breath) for a “new” Gold coating of on the West Virginia State Capitol Dome, which is just up the  street. It seems only logical that the recent thunderstorms and a tremendous lightening strike (point blank) last week, on the dome, has reduced my DX to a trickle. I’m just not getting the usual radio signal “bounce” off all that gold.

All kidding aside; the weather has been terrible for the last few weeks. I think the same can be said about most of the European stations which I usually work. They seem to be underwater for the most part. I saw on the news this morning where Calgary Canada has been flooded. The mid west here in the US is still experiencing severe thunderstorms on a daily basis. I think we’re all in trouble with these shifting, and unusual weather patterns in the world.

Perhaps, in some unusual way, I’ll experience these unusual DX band conditions again next year at the same time? It’s beginning to sound like my DX contacts are somewhat of a fluke now, which is difficult to explain. I’ll be looking forward to the beginning of next year, to see if these conditions repeat themselves.


John Smithson, Jr., N8ZYA, is a regular contributor to AmateurRadio.com and writes from West Virginia, USA. Contact him at [email protected].

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