W5MPZ Field Day!
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
| TA-33 with the 80m windom in the background |
Dipoles
On my first shot, I got over this tree and the line sat perfectly on the brown number post.
| The perfect shot. |
| Old Glory on our 80/40 trap dipole |
RPi camera
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 |
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.
| 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?
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
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 |
| Saturdays operating position |
| Sundays spot...lunch time |
| Sundays weather |
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.
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].















