May 19, 2018
Posted by on
The life thing has been pretty disctracting from ham radio the past few weeks. I just returned from a week long business trip to the Philippines and then had a bunch of catch up to do. This week I started making Field Day and Portable operation preps. I took out all my battery packs and charged them with the solar panels. All are ready to go now.
I ordered a cool little gizmo for the FT-817ND. It is a 3D printed power connector that fits nicely on the back of the radio and converts the power inputs to Anderson powerpoles. I got mine from Ebay:
Regarding Field Day, I am still thinking about a 20m beam. I’ll be doing some modeling comparing the Buddistick, the 2 element vertical beam and a 2 element, inverted-V wire beam. I have already built two of these three and have good results on QRP.
I tried some operating today but so far conditions have been…well they have been pretty bad. SFI=68 and SSN=0 makes for some pretty bad propagation. Definitely need to up the antenna game.
April 10, 2018
Posted by on
I came across an interesting read from Jim, N2GXJ entitled “Thinking about Field day Antennas“. This talks about Field Day scoring and how to improve your score. He points out that the key to Field Day comes down to the sheer number of QSO’s you make irregardless of where they are from. Jim starts by looking at poulation density from the US Census as an indicator of where ops will be located:
This map tends to confirm my previous experience that the bulk of contacts are made up and down the east coast and in California. Last year I ended up running at 45W due to poor propagation and did notice many stations coming in from California. I made the mistake of not working more of them.
So from my QTH in South Texas I need to target the East and West coasts with daytime activity on 20m and 15m. The 2el vertical beam for 20m will definitely be a good choice for pointing to the east coast and should let me go back to QRP levels. I’ll try and test this out this coming Saturday if the weather holds (good to test the battery system while I am at it).
November 15, 2017
Posted by on
New QST came in with the results of this years Field Day. Here is my score. My score is #3 on the following list:
I was only one of two stations claiming a 1B1 class in the STX section and I had the higher score. Out of all STX stations reportiong across all classes I came in 54 out of 72 stations. In the 1B1 class, I came in at 60 out of 102 stations. Top score had 1371 Q’s! Overall happy with these results considering I only worked FD for about 8 hours and was running 45W on solar charged battery power. Looking forward to improving the score in 2018!
September 2, 2017
Posted by on
Configured a Pelican case to carry the FT-450D and an MFJ-4230MVP 12V power supply along with the microphone and assorted cables. The case has two “levels” so there was plenty of room. I plan to use the FT-450D portable with antennas that can be matched with the internal 3:1 tuner. So this is my FT-450D “go-kit”:
I have a QRP version of this with the FT-817ND in another case. There is also a smaller case now which holds the Netbook and cables needs to connect either rig for digital modes. I have one more smaller pelican case to configure for solar charged portable operation with the LiFePo batteries.
June 28, 2017
Posted by on
I got a late start to field day this year due to a late breaking family commitment. Our club tried to setup at the local weather station but cancelled operations due to a large noise source crashing the bands at that location.
I started operating about 19:30 UTC. I started at 5W on SSB but over the first hour only made one contact. The band conditions were not good on 20m with lots of QRM and QSB. I added the amplifier and started to work on 45W. My power draw was significantly higher but my Q rate increased. The solar panel kept up with the power consumption even though there was quite a bit of cloudiness. I continued to operate on 20m until dusk when I switched to 40m. Overall I made 60 Phone contacts over the course of about 8 hours. My score this year will be lower even with more Q’s due to the higher power I ran. I did not get a chance to run digital.
- Digital logging – netbook needed one charge cycle during this period. The 12V to 18V DC-DC converter was running at abou 2.2A during the charging cycle. I used a 7Ahr for this through a spare Solar Charge controller. I am going to look at a tablet for next year.
- The EFHW antenna worked great on 20m.
- SOTAbeams travel mast + TV tripod worked great to support antenna with no guy lines.
- Solar generator box had enough juice to supply the day’s activity even at the higher power consumption and had some power to spare.
- Tube Tarp came in real handy as shade. Luckily no rain on Saturday. I’ll do better with the depolyment next time as I figured out how to guy it better.
What did not work so good:
- Can’t run digital mode while using an amp. The amp uses the ACC port on the radio but provides no pass through. I am looking at how I can accomplish this for next time.
- I don’t have the battery budget to run 45W phone for 24 hours. I figure I would have run out of power after about 12 hours. Partly cloudy day didn’t help.
- Didn’t take advantage of more 6 stations to raise Q count.
- Calling CQ consumes a lot of power. Need to refactor the power budget.
So I figure my score this year for 60 SSB QSO’s + bonus points for emergency power will work out to 310 for my 1B station. I am convinced now that I have to finish learning CW so that next year I can run 5W on CW and up my point count. A more directional antenna would be nice but a portable beam antenna remains elusive. For some reason I seemed to be doing better with stations in California than on the more densely populated east coast.
In summary, A great afternoon of outdoor radio fun and already looking forward to next year.
June 23, 2017
Posted by on
My Field Day preps are done. Tested the EFHW and its ready to roll on 20m and 15m. There is 12Ahr of solar charged battery ready as well. I won’t be able to join the club at the NWS office as I have a commitment in the morning I have to deal with. I may start late but I am ready for operations in the backyard. Will get some water bottles and snacks for daytime ops. There is a 30% of rain tomorrow afternoon so I’ll keep an eye on that as well to see if I need to deploy the tarp tent. Rain means clouds so that may help moderate the heat. Today the NWS is advising people to stay indoors between 1pm and 5pm!
Tested the EFHW a bit and am finding Common Mode Current issues if I run higher than 90W. The SWR increases with power and foldback starts kicking in if I try and run at 100W. This should not be a problem on FD as I’ll be running at 5W where everything behaves itself. I’ll be trying computer logging this year as well. If things get real tough on Phone I plan to try PSK31 and have setup some DM78- macros for that.
Looking forward to a great Field Day in the outdoors!
June 21, 2017
Posted by on
I purchased the following for $1 at Home Depot yesterday to form links for the EFHW I plan to use for Field Day:
These are buckles to make paracord bracelets. Here is how the resulting link looks like using these, a couple of cable ties and a pair of Anderson Power Poles:
I have made initial wire cuts for 15m, 17m, 20m and 40m. I also cut 1/10 wavelength counterpoise wires for each band. I have also prepped the Travel Mast and the TV Tripod so I will hopefully setup later this afternoon (when it cools off a bit) and tune the wires. I’ll run 15m-20m as a vertical and 40m as an inverted V.
The only other prep I am working on today is I’ve taken the solar generator box I built last year and set it up outside with the two 15W panels to charge them up.
Update: Just did the calculations on the 40m inverted V and found that I probably don’t have enough space to lay that out in the backyard due to obstacles. Will configure the first half as a vertical and then the remaining half as a sloper which I’ll aim towards the north and terminate 4 feet off the ground. Only need a radius of about 16ft. A quick run on EZNEC show the following pattern:
June 18, 2017
Posted by on
I was pondering what I would do for a Field Day antenna after yesterday’s debacle with the Homebrew Buddipole and military mast. It just hit me a few minutes ago. I’ll run the EFHW antenna as a vertical on 20m and 15m. It is a proven performer and it is resonant thus no tuner needed. I’ll use the TV Mast tripod Cliff gave me to support it during the contest on the SOTABeams Travel mast. What I will do this week is set that up and cut some links for 15m, 20m and possibly even 40m. Will be much more manageable as a vertical. I have 5 days to work out the details. Tomorrow morning I’ll put put the battery packs and solar panels to top off the charge. This should work!
June 12, 2017
Posted by on
Working on Field Day antenna selection this week. I am down to using the Homebrew Buddipole, Buddistick or end fed vertical antenna this year. I plan to operate as 1B battery operation so I am limited to 5W on SSB. This will be my main challenge this year given the worsening band conditions as the solar cycle continues the drop.
A previous post showed some data on the homebrew Buddipole mounted at 16 ft with a painters pole. I am working on a few tweaks now that will bring resonance into the band and simplify the azimuth adjustments.
The Homebrew Buddistick served me well in 2015 but band conditions are shifting. Here is some modeling data comparing the Buddipole at various heights vs the Buddistick on 20m:
The Buddipole at 16ft and 20 ft outperforms the Buddistick down to about 25 to 20 degrees. The Buddistick has more gain below these take off angles. At 30 ft the Buddipole is better or equal to the Buddistick from 60 degrees all the way way down to zero.
One thing I could do is use both antennas and switch back and forth as needed. This would not be overly complex to do. My challenge is getting the Buddipole up above 16 ft. If I can get setup using the military poles I can get the Buddipole up to 30 ft and only use the one antenna.
June 4, 2017
Posted by on
I have two more weekends to prep for 2017 ARRL Field Day. Next weekend I plan to test the Homebrew buddistick on 20m WSPR and compare to the 20m Buddipole I tested last week. I need to complete a 1:1 current balun for both of these antennas. I am also reconfiguring my go-kits. I have a case for solar power generation, another to carry gear for digital ops, and yet another for the FT-817ND and other equipment. I have also sourced a “tarp tent” which I hope to test next weekend as well. Just missing a field portable chair and table at this point. Need the shade and will need plenty of water as well.
My plan now is to run solar powered battery operation from start of the event on Saturday, run 20m & 15m through the day then switch to 40m once the sunsets and operate till the late evening. I will not likely operate on Sunday at all. I plan to start with SSB and switch to digital PSK31 if band conditions limit QRP SSB operation.