GoKit for Field Day and EMCOMM


Completed VHF/UHF GoKit

Completed VHF/UHF GoKit

We’ve been thinking about building a portable GoKit for VHF/UHF EMCOMM and Field Day Applications for a while now. The following is a list of our requirements for a GoKit –

  • 2m and 70cm operation with FM simplex and repeaters
  • APRS capability and tactical display for portable coordination
  • Digital messaging capability
  • Weather band monitoring capability
  • AC Power with flexible battery backup options

A plan to build our GoKit came together during our trip to the Dayton Hamvention this year.

Kenwood TM-D710GA At Dayton

Kenwood TM-D710GA At Dayton

The heart of any GoKit is the Transceiver. We’ve been using Kenwood equipment for our APRS iGate for some time now and we have had good results with it. Kenwood’s latest 50W transceiver with APRS is the TM-D710GA. This unit provides full support for APRS tactical applications and now includes a built-in GPS receiver making it ideal for our GoKit application.

AvMap GeoSat 6 APRS Tactical Display

AvMap GeoSat 6 APRS Tactical Display

We have been using the Kenwood TM-D710 along with an AvMap GeoSat APRS display in our APRS iGate setup and the combination works very well. The AvMap display lets one see the location of portable and mobile APRS stations on a map display. This arrangement is perfect for coordinating activities in an EMCOMM situation. The AvMap GeoSat 6 APRS display is no longer in production but I was able to locate a nearly new unit on eBay.

3 - iPortable Enclosure

We had a chance to look at the iPortable enclosure at Dayton and decided that their Pro 2 4U deep unit would be a good choice for our GoKit application. The iPortable enclosures are based on a portable rack mount case and include a DC power system, speaker and headphone hookups, a light, and provisions for a cooling fan.

Radio Shelf

Radio Shelf

With all the components in hand, we began the construction of our GoKit. Reliability is important in any portable system like this so we put some time into securely mounting all of the equipment and neatly arranging the cabling. First came the shelf which holds the Kenwood transceiver and a SignaLink USB sound card. A combination of drilling the shelf to secure gear with large cable ties and #8 stainless hardware was used here.

Coax Connector Cables

Coax Connector Cables

Our iPortable case was equipped with both SO-239 and N-connectors on the front panel to allow for antennas and feed lines equipped for either connector type. To make the change over between the connector types easy, we installed separate PL-259 jumper cables for each connector. One simply connects the appropriate jumper to the radio.

Display and Power Shelf

Display and Power Shelf

The power and AvMap display shelf was next. The AvMap display mount was dissembled and modified to accept a custom mounting bracket.

PWRgate Battery Interface and Charger

PWRgate Battery Interface and Charger

The iPortable enclosure was drilled to mount a West Mountain Radio PWRgate to handle backup battery charing and management. The PWRgate supports instantaneous switching between an AC power supply and a backup battery and can accommodate a wide range of battery types and sizes.

Backup Battery

Backup Battery

The PWRgate was configured to properly charge our 18AH AGM backup battery. Note the use of a fuse in series with the battery for safety reasons. We used a Powerwerx SPS-30DM adjustable power supply set to 14.5Vdc to operate our GoKit and to provide proper charging voltage for our AGM battery.

Diamond X-30 Antenna and Mast

Diamond X-30 Antenna and Mast

The last piece of the setup was the antenna. We wanted something that was portable, easy to set up and would provide good performance. We choose a Diamond X-30A 2m/70cm ground plane antenna and mounted it on an 12′ fiberglass push up mast. The feed line is made from 25′ of LMR-400UF coax. Several bungee cords are used to attach the mast to a fence post or other vertical structure.

10 - GoKit In Use

The picture above shows the completed GoKit in operation. We typically set one side of the Kenwood TM-D710GA to operate as an APRS transceiver and Digipeater and the other side to operate on a local repeater or simplex FM. The SignaLink sound card is used with a laptop computer running Fldigi and NBEMS for messaging applications. The iPortable case has a 13.8V lighter socket which connects to a power brick to power our laptop PC.

GoKit Packaged for Transport

GoKit Packaged for Transport

The GoKit is quite portable when closed. All of the equipment and cable connections are enclosed and protected by the case’s removable end caps. We’ve tested our GoKit during our club’s weekly repeater net and it worked great. The first real use of our new GoKit will be at Field Day this year. It will be located in our public information tent and will be used as a “talk-in” system.

Fred, AB1OC

 

Quicker-Turnaround Digital Modes in Experimental Stage for WSJT-X Suite


WSJT Screen

WSJT Screen

WSJT-X developer Joe Taylor, K1JT, weighed in to express his appreciation to all who shared their ideas and experiences using JT9 and JT65 modes during recent multi-hop E-skip openings on 6 meters.

“We are very much aware that a mode with most of the excellent characteristics of JT65, but with faster turnaround time, would be a big winner in such situations,” Taylor commented on behalf of the WSJT-X development team. “We are experimenting with several such possibilities. Tentative goals include 15-second T/R sequences, sensitivity around S/N = –20 dB, occupied bandwidth less than that of JT65, and capability to decode as many as 10 or 20 signals in a 2-kHz bandwidth.”…

Source: Quicker-Turnaround Digital Modes in Experimental Stage for WSJT-X Suite

This is something to follow if you are interested in the JT modes for HF and VHF communications. Our experience is that a new JT variant that would trade S/N margin for a faster QSO segment speed would be just the ticket on many of the HF bands as well as 6m.

  • Fred, AB1OC

Nashua Area Radio Club’s 2017 Field Day Station Test


ARRL Field Day is the Nashua Area Radio Club’s largest and most popular activity each year. You can see more about our recent Field Day activities on our Field Day page and on our Blog.

Dave Merchant K1DLM, our Field Day chairman, is bringing some 21st Century radio and computer technology to our club’s Field Day setup this year. There are several aspects to this new component of our Field Day plans including –

  • Two Flex-6700 Software Define Radios running over a network  for our new Digital and enhanced GOTA Stations
  • An on-site WiFi Network to enable using the N1MM+ Logger in network mode for sharing of log information, station activity, real-time scores, and messages
  • A central Score Board and Club Information Computer in our public information tent
2017 Field Day Site - Upper Field Layout

2017 Field Day Site – Upper Field Layout

We will again be holding our 2017 Field Day operation at the Hollis-Brookline High School in Hollis, NH. We are planning on using the upper baseball field area as our main operating location. We have decided to add a third tower this year and locate it on a soccer practice field which is situated several hundred feet away from our main operating area. All of our antennas and equipment will lie within the required 1000′ circle but the third tower would situate those operating at that location away from the rest of our group. Dave’s solution to this problem was to set up a network and operate two Software Defined Radios (SDRs) at the lower site remotely from our location on the upper field.

Dave has enlisted club member Piece Fortin, K1FOP to be our IT Chairman for Field Day this year. Pierce has been instrumental, along with Dave, in the planning and testing of all of this new technology. Pierce and Dave have a great deal of networking and IT experience and knowledge and we could not have put together what is described here without them.

Dave K1DLM, Piece, Hamilton K1HMS, Mike Ryan K1WVO, Anita AB1QB, and myself have gotten together multiple times to set up and test all of this new technology. I wanted to share some more about the equipment and the associated testing (which has been staged in the kitchen at our QTH – thank you Anita!).

We began the testing process by setting up our 20m CW station.

20m CW Station Test

20m CW Station Test

This station uses an Elecraft K3S Transceiver, a K1EL WinKeyer and the N1MM+ Logger running on a Windows 10 Laptop PC. We used this station to get our basic N1MM+ setup including our Field Day CW keying macros right.

40m SSB Station Test

40m SSB Station Test

Next came our 40m SSB station. This setup uses an Icom IC-7300 Transceiver and allowed us to set up and test N1MM+ on the fly audio macro recording and playback. All three of our SSB stations will have on the fly recording and playback capability which will allow each of our SSB operators to record and use a custom set of audio macros.

Digital Station Test

Digital Station Test

Next came our Digital Station. This station uses one of the two remote Flex-6700 SDRs.

Remote Flex-6700 SDRs and Antenna Switch

Remote Flex-6700 SDRs and Antenna Switch

Dave, K1DLM put together a really nice package for the two Flex-6700 SDRs and associated equipment which will be located on the lower field. He used a rack system to mount the two SDRs, power supplies, a three-band Tri-plexor, a set of bandpass filters for 80m, 40m, 20m, 15m, and 10m and a 403A 8×2 networked antenna switch. This setup allows either of the two SDRs to share the tri-band yagi or the 40m and 80m Inverted-V antennas on the tower on the lower field and operate on any of the 5 available HF bands. Antenna and filter switching automatically track the frequencies of the two SDRs making the setup simple to use.

Digital Station Second Display - SmartSDR & More N1MM+

Digital Station Second Display – SmartSDR & More N1MM+

The Digital Station’s remote SDR will be operated using a SmartSDR client running on the Digital Station laptop PC. This station will have a second monitor to better accommodate all of the windows associated with it.

Digital Station Main Display - N1MM+

Digital Station Main Display – N1MM+

The main display associated with the Digital Station will run decoders for all PSK and RTTY modes. The ability to decode multiple PSK signals simultaneously and multiple RTTY decodes are available. The Digital station also acts as the N1MM+ master station in our Field Day setup for all of the other stations which use N1MM+.

Satellite Station Test

Satellite Station Test

Our Satellite Station 2.0 was also added to the test setup. It uses a MacBook Air laptop running MacDoppler to control the antenna rotators and the Icom IC-9100 Transceiver which are part of our Satellite Station. A Windows 10 Surface Pro computer is included which runs N1MM+ and provides logging and other network functionality for our Satellite Station.

GOTA Station Test

GOTA Station Test

We also tested our GOTA station which uses the second Flex-6700 SDR and a FlexRadio Maestro to provide a more conventional “buttons and knobs” interface for our GOTA operators to use. This station will also have a laptop PC running N1MM+ for logging.

Scoreboard Computer

Scoreboard Computer

We also build and tested a Scoreboard PC. This computer will be located in the Public Information tent at Field Day and will be connected to a large display. It will show our real-time score, QSOs being logged as they are made and other useful information about our Field Day operations. This computer will also continuously play videos from our Club Video Collection and will provide access to IP video cameras which monitor the tower and equipment on the lower field.

Pierce, K1FOP and Hamilton, K1HMS Testing CW Stations

Pierce, K1FOP and Hamilton, K1HMS Testing CW Stations

Our networked N1MM+ test bed contained at least one station of each type (CW, SSB, Digital, Satellite and GOTA) that will be part of our Field Day setup this year. The Station Masters for the additional CW and SSB stations came by to test their setups using the test bed.

Field Day Networking System

Field Day Networking System

The networking system which Dave and Pierce built is central to all of the technology described here. All of the gear is mounted in a single rack which will be located on the upper field during Field Day. The setup includes a Firewall/DHCP server, a commercial grade outdoor WiFi access point, a 4G LTE modem for Internet access, an Ethernet Switch, and a UPS power supply.

MoCA Data Link Cable

MoCA Data Link Cable

The upper and lower fields at our Field Day site are separated by several hundred feet. A thick line of trees between the two locations raised concerns about connecting the upper and lower sites using WiFi. Piece came up with a great solution to this problem – we will be using MoCA Data Modems and RG6 Quad Shield 75 ohm Coax Cable to provide a 10 Mbps data link between the two sites. We tested the MoCA link using a much longer run of coax cable then we will need to use at Field Day and confirmed full 10 Mbps throughput.

N1MM+ Talk Window

N1MM+ Talk Window

Our networked N1MM+ setup will allow any station in our setup to send messages to everyone who is operating at Field Day. We can use this capability for important communications like “lunch is ready!” or “I need help from Pierce (our IT chairman) on the 40m SSB station”, or “The 6m band is wide open!”.

Our GOTA and Digital stations will be located together in the same tent and will provide our Field Day 2017 visitors to see and use 21st century Amateur Radio technology to make contacts. We are expecting young people who participated in our club’s High-Altitude Balloon project and from other local schools where we have done Amateur Radio activities to attend. In additional to being a learning opportunity for all of us in the Nashua Area Radio Club, we hope that the state of the art technology that we are using will generate interest among our visitors. If you are local to the Nashua, NH USA area, come pay us a visit during 2017 Field Day. We’d enjoy providing a tour for you and your family along with a chance to Get On The Air. Hope to see you at Field Day!

Fred, AB1OC

2014 Es Season On The Magic Band – A Journey Towards A 6m VUCC


6m Band Opening Viewed On DXMaps

6m Band Opening Viewed On DXMAPS

I decided to become active on the 6m band this year. This 6m Sporadic E (Es) season was in full swing about a month ago when I got active on 6m. The picture above is from the DXMAPS website and shows one of the daily openings that we’ve experienced on 6m here in the US during the last month. The DXMAPS website is a good tool for monitoring for VHF/UHF band openings (10m and higher). The site collects and plots cluster spots and propagation mode information on a world map in real-time. This includes spots from CW Skimmers which monitor beacons on the VHF and UHF bands. This allows one to determine when a VHF/UHF band is open and the directions for possible QSOs from one’s location. As you can see from the picture above, there was a solid 6m opening on this particular day from my QTH in New England to the Midwest, the Southeast and the Caribbean! You can also see the beginnings of an opening into Europe.

Cluster Spots During A 6m Band Opening (DXLabs SpotCollector)

Cluster Spots During A 6m Band Opening (DXLab SpotCollector)

The graphic above shows spotting cluster data (we use the DXLab Suite at our station). You can see the details of the stations being spotted during the opening.

The 6m band is often called the “magic band” because it exhibits many different propagation modes including Sporadic E (Es), Tropo, Aurora, Iconoscatter, Meteor Scatter and even Earth-Moon-Earth (EME or “Moon Bounce”). You can find a good introduction to the magic band, its propagation possibilities and some ideas on how to get started on 6m on these sites:

I would also recommend Six Meters: A Guide to the Magic Band by Ken Neubeck, WB2AMU. While the equipment information in this book is somewhat dated and it can be a little had to find, it contains excellent information on propagation modes and operating on 6m.

Many of the 6m propagation modes can be very short-lived so one must be prepared to make short contacts at the start of a QSO. The typical 6m exchange would include callsigns, signal reports and grid square (more on grid square below). The 6m band is typically very quiet and will easily support QSOs that do not move one’s S Meter even with the rig’s preamps on!

SteppIR DB36 Antennas At Our QTH

SteppIR DB36 Antennas At Our QTH

We planned for 6m operation when we built our station a couple of years ago. Our primary antennas for 6m are our SteppIR DB36 yagis at 105′ and 65′. These antennas are used separately on the 6m band (we can run them as a 4 over 4 array on 10m – 40m).

SteppIR DB36 With 6m Kit

SteppIR DB36 With The 6m Kit Installed Below Our 2m and 432 MHz Yagis

Out SteppIR DB36 Yagi’s feature a 36 foot boom and have a 6m Passive element Kit installed which provide two additional elements on the 6m band. The resulting gain and front/back performance are in the range of  typical 5 element 6m mono band antennas. Having two independently directional antennas for 6m has turns out to be quite useful in contests and when monitoring for 6m openings. These antennas have 6 elements on 6m and are pretty directional. Typical operating setups at our QTH would have one antenna pointed to the West or toward Europe while the other is pointed south to monitor for openings to the Southeast and the Caribbean. In these configurations, we can instantly switch between two directions using our microHAM Antenna Control System.

AB1OC Operating Position On 6m

AB1OC Operating Position On 6m

Both of our two operating positions are 6m capable. They both feature Transceivers with good receivers (a Yaesu FTdx5000 and an Icom IC-7800) and both have PW-1 Amplifiers which provide 1KW output on the 6m band.

QSOs By Band

QSOs By Band As Of Early 2014

Before the 2014 Spring Es Season, we had only done limited operating on the 6m band. I did participate in the 2013 ARRL June VHF Contest and operated on a combination of the 6m, 2m and 70cm bands during that contest. I also did some 6m operating as part of the 13 Colonies Special Event in 2013. In total, I had made about 200 QSOs on 6m and had worked 10 grid squares by the beginning of the 2014. Most of these 6m contacts were with stations in the US with a few to the Caribbean. My longest DX up to that point in time were a few contacts 6m stations in the Canary Islands on the northwest coast of Africa.

JT65 QSO On 6m

JT65 QSO using WSJT-X and JTAlert On 6m

At the start of the 2014 Spring Es Season, I decided to get serious about earning an ARRL VUCC Award on 6m. This award requires one to work and confirm 100 grid squares on the 6m band (it’s also available for 2m and higher bands). I began by studying 6m propagation modes and monitoring the calling frequencies on the 6m band. We work a combination of modes on 6m include SSB Phone, CW, and digital (using JT65). The CW and JT65 modes are very useful on the 6m band when the propagation conditions are marginal. We recently upgraded to Joe Taylor’s WSJT-X software which supports both the JT65 and JT9 weak signal modes. This WSJT-X software coupled with JTAlert software from HAMApps integrated the JT65 and JT9 modes very well with the DXLab suite that we use for logging and other DX’ing work at our station.

There were some exciting times on the air during the early part of the Es Season this year. Two that stand out were my first double hop Es contacts with hams in California and several openings to the Midwest and the Southeast where the band went from dead to very active in a period of 5-10 minutes! This is typical for the 6m band but it’s quite an experience to go from calling CQ with no answers to being in the middle of an almost instant small pileup!

AB1OC Claimed Score In 2014 ARRL VHF Contest

AB1OC Claimed Score In 2014 ARRL VHF Contest

I also decided to operate in the 2014 ARRL June VHF Contest again this year. I decided to operate in the Single Operator, High-power Category on 6m only. I was able to make a little over 300 6m contacts in this contest and managed a score that was significantly better that my 3 band effort in this contest last year. My QSOs were primarily SSB phone mode but I also managed a number of contacts in CW mode and a few digital QSOs using JT65.

AB1OC Worked Grids In 2014 ARRL VHF Contest

AB1OC Worked Grids In 2014 ARRL VHF Contest (N1MM Logger)

As you can see from the screenshot from the N1MM logger that I used for the contest, I was able to work quite a few grid squares. We had a very nice opening to the Southeast and Florida during the contest period and this resulted in lots of new 6m contacts and even some small pileups at times!

AB1OC Worked Grids In The Americas

AB1OC Worked Grids In The Americas

By the end of the contest, my total grids worked was up to 98 and this put me very close to my goal of earning a VUCC on 6m. At this point I was hooked on 6m!

AB1OC Worked Grids In Europe And Africa

AB1OC Worked Grids In Europe And Africa

A couple of days after the contest ended, I took a look at the DXMAPS website and saw that a good 6m opening was occurring to Europe. I got on the air and was able to make my first ever contacts into Europe on 6m. The opening was a “spotlight” one (covering a limited area) that involved double hop Es propagation in Spain, Portugal, France and Morocco. Over the period of about an hour and a half, I made some 30 contacts into these countries. A very exciting time on the air and one that I will not soon forget!

AB1OC Worked Grids Around The World

AB1OC Worked Grids Around The World

With the opening to Europe and some continued operation on 6m I am currently at 122 Grid Squares worked (with 91 confirmed so far. My 6m QSO count stands at 755 with 112 new grid squares and approximately 550 QSOs made in the last 30 days.

The website used to plot the grid squares worked and confirm in the previous pictures is WG7J’s GridMapper site. Its a really nice tool to visualize the grid square one has worked or still needs to work.

At this point, I am totally hooked on the 6m band! While a yagi antenna with 5 or more elements helps a lot on 6m, I have found that it does not take a big station to have fun on the band when it’s open. I have worked many station in the US who were using wire antennas and verticals with 100w or less. See the following youTube video for an example of a simple 6m setup. Another good 6m intro video can be found here. If you have not given 6m a try, I encourage our readers to take a look at the band. It is really quite a lot of fun.

– Fred (AB1OC)

Contest Results for Anita (AB1QB) and Fred (AB1OC)


Anita’s Best Contest Result To Date – 2013 BARTG RTTY Contest

Anita’s Best Contest Result To Date – 2013 BARTG RTTY Contest

Anita (AB1QB) and I really enjoy working contests to build our skills as operators. Anita has steadily improved her RTTY contesting skills over the last 18 months as is getting to a point where she is quite competitive. He best finish to date was a 5th place finish in the world in the 2013 BARTG RTTY Contest in the Single Operator All Band Category. BARTG RTTY is a pretty major worldwide RTTY contest and her 5th place finish is a great accomplishment given her limited experience (Anita is licensed for just about 3 years). You can read more about Anita’s experiences in this contest here.

AB1QB 2013 ARRL RTTY  Roundup Certificate

Anita’s (AB1QB) First Place NH Finish – 2013 ARRL RTTY Roundup

Anita’s first serious contest attempt was the ARRL RTTY Roundup in January 2013.    She placed 1st in the New Hampshire section in the single operator high power category.

Anita’s (AB1QB)’s First Place NH Finish - 2013 (RTTY) North American QSO Party

Anita’s (AB1QB) First Place NH Finish – 2013 (RTTY) North American QSO Party

Anita also finished first in our state during the 2013 NCJ North American RTTY QSO Party. Anita is a regular participant in RTTY contests and she at the point where she is entering some RTTY contests for the second or third time. Her goal is to improve here score in each successive attempt a RTTY contest that she has competed in the past. She is also getting better at contest strategy particularly in the area of band/time planning.

Fred’s (AB1QB) First Place Finish in NH – 2013 ARRL June VHF Contest

Fred’s (AB1QB) First Place Finish In The NH Section – 2013 ARRL June VHF Contest

I received a very nice surprise in the mail recently – a certificate for my very first VHF contest effort (the ARRL 2013 June VHF Contest) last year. Since this was my first VHF contest, I operated only in SSB phone mode with the goal of learning what VHF contesting was about and testing the VHF side of our station for the very first time in a contest. I operated in the Single operator High Power Category on a combination of the 6m, 2m and 70cm bands. It was a very nice surprise to receive a 1st place certificate for NH for this contest!

I am planning to enter this contest again this year (2014) in the 6m single-band, high-power category. I am working on completing my first ARRL VUCC Award on 6m and I am hoping that the contest will help me toward this goal.

Contesting is a great way to improve your skills, work DX, make progress towards operating awards, and just plain have fun. I’d encourage our readers to give contesting a try. You do not need a “big” station or a lot of power to have fun in contests. There are many articles on contesting and contest station design here on our blog. A read through of some of these should help you to get started in contesting if you’re interested.

– Fred (AB1OC)

AB1QB/AB1OC Enter The 2013 CQ WW RTTY Contest


AB1QB Hard At Work During The 2013 CQ WW RTTY Contest

AB1QB Hard At Work During The 2013 CQ WW RTTY Contest

Anita (AB1QB) and I (AB1OC) recently participated in the 2013 CQ WW RTTY Contest. Band conditions were fairly good and we had some fun experiences in this contest. We entered the contest in the Multi-Operator, Single-Transmitter (Multi-Single) High Power category with a goal of finishing in the top 10 in North America.

Our Claimed Score for 2013 CQ WW RTTY

Our Claimed Score for 2013 CQ WW RTTY

One of us was on the air for almost the entire 48 hour contest period and we managed a final claimed score of a little over 2.7M which will hopefully allow us to achieve our goal for this contest. We were active on all 5 contest bands with the best results in terms of both QSO counts and multipliers on 40m, 20m and 15m.

N1MM Setup For 2013 CQ WW RTTY

N1MM Setup For 2013 CQ WW RTTY

We again used the excellent N1MM logger along with both the MMTTY and 2Tone decoders. The use of multiple decoders really helps to get callsigns and exchange information correct. Using multiple decoders to process  received transmissions (plus the built-in decoder on our Icom IC-7800 Transceiver) gives a 3-way vote on decoded QSO information.

A Notable Spot - AB1QB Booming Into Cyprus!

A Notable Spot – AB1QB Booming Into Cyprus!

We focused on working into Europe and Asia/Oceania in this contest as these two regions provided the maximum QSO point value and were both very active in the contest. As you can see from the above spot, we had a very strong signal into Europe and Western Asia which helped generate many QSOs while running. We also worked quite a few contacts in Japan with a total of 120+ QSOs with operators in Japan during the contest.

We both had a great deal of fun during this contest and were very happy to post our best score yet in a contest of this type. We’ll be anxiously looking forward to the final results when they are available.

– Anita (AB1QB) and Fred (AB1OC)

2013 Field Day


CW Station Operations

CW Station Operations

Our club, PART of Westford, MA USA, held our 2013 Field Day event at the Concord Rod & Gun Club again this year. We operated three HF Stations (SSB Phone, CW, and Digital) as well as a VHF and a Satellite Station this year. All of our operations were QRP 5 watts and used solar/battery power. The photo above shows Bob (W1IS) and Bill (AA1O) operating the CW station. Our day began with the setup of our antennas and the four stations.

Field Day Tri-Bander

Field Day Tri-Bander

Anita (AB1QB) and I handled the HF beam antennas for our Field Day Operation. This included a Hy-Gain TH-3JRS Tri-Bander loaned to the club by Allison (KB1GMX) which was installed 20 ft up on a guyed military push-up mast.

15m Buddi-Beam

15m Buddi-Beam

We also brought our 15m and 10m 3 element budi-beam mono band yagis which we designed for portable operations. These antennas plus a G5RV and a 40m wire beam made up our HF antenna farm for Field Day. All of these antennas were brought to a common interconnect panel where they could be connected to any of the three HF stations. We setup all of these antennas at home the week before to confirm that they worked as expected and to ensure that they could be erected safely and quickly at our Field Day site.

VHF Tower

VHF Tower

Another part of our team spent time to put up a Rohn 25G tower for our VHF Station. Allison, (KB1GMX) led this effort and supplied yagis for 6m and 2m. Operating on these bands QRP 5 watts is quite challenging and Allison was able to make a fair number of contacts by utilizing her considerable VHF operating experience.

Digital Station Battery Power

Digital Station Battery Power

With the antennas up, we turned our attention to the setup of the digital station and its associated battery and solar power. The digital station is the most challenging in terms of off-grid power because we need to power both the Transceiver and a Personal Computer as the latter is integral to generating and decoding digital mode signals over the air. The power system for the digital station consisted of two 65 Ah dry cell deep cycle batteries and a solar charging system. The batteries were sized to allow operation of the digital station for the full field day period of 24 hours in the event that we had limited sunshine due to clouds or rain.

Solar Panels

Solar Panels

The battery system used SunSaver MPPT charging system setup in a 30 Vdc configuration along with two PowerFilm 90W folding portable solar panels wired in series. We had good sunlight during the daytime and the solar panels were able to keep our batteries fully charged. The CW and SSB phone station used a few sets of smaller batteries and a solar panel to recharge them.

SSB Phone Station Operations

SSB Phone Station Operations

All three of our HF stations used Elecraft KX3 Transceivers. The KX3s turned out to be an excellent choice for our Field Day operations as they have low power consumption, a good receiver and provide excellent usability and external interfacing capabilities for automated logging, CW and digital operation. The photo above shows Scott (NE1RD) and Lyman (W1LKS) operating the SSB phone station. We used PCs on all three station to automate logging. We used Andy’s (KB1OIQ) xlog logger for the Phone and CW stations and the N1MM logger for the Digital Station.

Digital Station Equipment

Digital Station Equipment

Anita and I were the coordinators for the Digital Station and we decided to update the configuration of the digital station this year. In addition to the Elecraft KX3, we used a Windows 8 PC running N1MM/MMTTY/2Tone/FLdigi to handle the logging and digital mode processing.

Digital Station Software

Digital Station Software – RTTY Mode

N1MM provided a more contest-oriented logging setup as well as the ability to run multiple digital decoders to give us the best possible chance of receiving digital transmissions without error. For RTTY signals, we used a combination of the MMTTY and 2Tone encoder/decoders. For PSK signals, we used FLdigi. After some initial tuning, we got good results with this combination of software.

Satellite Station

Satellite Station

Bob (KB1SWZ) put together a very competent Satellite station to complete our Field Day setup. Working LEO birds QRP 5 watts on Field Day provided to be quite a challenge as its hard to compete with the many higher power stations contending for the birds on Field Day.

Toolbox Talk

Toolbox Talk

With all of the stations setup and ready to go, we provided a series of “Toolbox Talks” to help members of our club understand our field day stations and how to use them. Shown above is Scott (NE1RD) explain how to use the Elecraft KX3 which was central to all three of our HF stations.

Digital Station Operations

Digital Station Operations

One of the best parts of Field Day is that it provides the opportunity to spend time with newer operators and young people to introduce them to many aspects of Amateur Radio and to provide them with opportunities to get on the air and try new things. Shown above is Fred (AB1OC) explaining the operation of the Digital Station.

Field Day Feast

Field Day Feast

We are fortunate to have our club sponsor a nice meal as part of our Field Day event. Charlie (W1ADL) and Rick (W1RAG) did a great job with food for our event this year. In addition to a great meal, this provides all of the club members participating in our Field Day event a chance to socialize and have fun.

We operated for the full 24 hour period again this year and managed to make a good number of contacts with our QRP setups. The totals for our effort were 722 QSOs (up from 587 in 2012) with a final score (including bonus points) of 7,355. A special thanks to everyone who contributed to or was part of making our 2013 Field Day event a success. We also very much appreciate Joe’s (KB1SSA) efforts to help us secure the excellent facilities at the Concord Rod and Gun Club for our Field Day event.

– Fred (AB1OC)