An Introduction To The DXLab Suite


Introduction To The DXLab Suite

Introduction To The DXLab Suite

I recently had the opportunity to put together a presentation introducing the DXLab Software Suite for several local radio clubs. The idea was to provide a fairly comprehensive introduction to DXLab and to show how it can be used to make Amateur Radio operations, QSL’ing and Award Management easier and more enjoyable. There are several good DXLab introductory presentations and web pages on the internet so we decided to do ours with some “live” demos of DXLab in use within our station.

Why Computer Logging And DXLab?

Why Computer Logging And DXLab?

Not all hams have made the conversion to computer-based operation and logging, so we began by covering the motivation for and some of the advantages of Computer-based operation and logging.

DXLab Suite Components Overview

DXLab Suite Components Overview

The next part of the presentation provided an overview of each of the components of the DXLab Suite as well as some of the basics of how they work together. This was covered via a set of “live” demonstrations using our station. You can view these demonstrations as videos via the following links:

Our station is a fairly complex one. It includes multi-operator capabilities from two operating positions with a total of four active radios and a microHAM station automation system. We also operate under a number of different callsigns from different computers. Finally, we do a fair amount of operating portable and from our mobile HF station. The DXLab Suite’s Launcher program with its multiple workspace capabilities easily handle the multiple configurations and equipment interfaces that are required for our station and operating style.

DXLab Use Scenarios

DXLab Use Scenarios

The next part of the presentation covered some common DXLab “use cases” that one would likely encounter when making contacts, QSL’ing and managing progress towards operating awards.

Casual Contacts With DXLab

Casual Contacts With DXLab

The first demonstration showed the use of DXLab to make casual or “rag chew” contacts. The emphasis here is on using the Suite to automate station configuration and logging tasks and to provide information to enhance the quality of your contacts. This demonstration covers the basics of how the components of the DXLab Suite work together to help you make and log a contact. You can view a video of this demo via the following link:

Finding And Working DX With DXLab

Finding And Working DX With DXLab

The next demonstration showed the use of DXLab to find and work DX contacts. This demonstration uses more components of the DXLab Suite including the spotting cluster and propagation prediction features. You can view a video of this demo via the following link:

Operating CW And Digital With DXLab

Operating CW And Digital With DXLab

The next demo shows how DXLab is used to find and make a DX QSO using Digital Modes. A RTTY QSO is shown including the use of the WinWarbler component and multiple RTTY decoders (MMTTY and 2Tone). You can view a video of this demo via the following link:

QSL'ing With DXLab

QSL’ing With DXLab

The next demo show how to use DXLab to QSL and confirm contacts. The demo covers QSL’ing via the Logbook of the World (LoTW) and the eQSL online QSL services as well as the generation of paper QSLs along with the assistance that DXLab provides to determine QSL route information. You can view a video of this demo via the following link:

DXLab QSL Card Examples

DXLab QSL Card Examples

DXLab can generate labels apply to your pre-printed QSL cards or it can be used to print QSL information directly on blank cards.

QSL Card Label Sheet Example

QSL Card Label Sheet Example

DXLab can print QSL card and address labels on many types of standard label stock. An example of QSL card labels are shown above.

QSL Envelope Generated By DXLab

QSL Envelope Generated By DXLab

DXLab also generates outgoing and return envelopes for your paper QSLs. An example is shown above.

Operating Award Management With DXLab

Operating Award Management With DXLab

The final demonstration shows how to use DXLab to track your progress towards and apply for operating awards. Some of the basics of QSL “aging” are discussed as well. You can view a video of this demo via the following link:

AB1OC Operating Awards In Our Shack

AB1OC Operating Awards In Our Shack

The set of operating awards that DXLab knows about and the features that it provides to manage your progress towards earning and applying for awards are some of the strongest features of the suite. We haves used DXLab to help us to earn many different operating awards.

Getting Started With DXLab

Getting Started With DXLab

The final part of the presentation covers the configuration of the DXLab suite to get it to work with your station. Since every station is different, its best to consult the excellent DXLab online help for more information on how to configure the suite.

Useful Information And Links

Useful Information And Links

Lastly, the presentation includes links to useful tools and information to help you get the most from the DXLab suite. Dropbox is a useful file sharing tool and it can help you keep your logs and DXLab configurations in sync across multiple computers. This allows you to use DXLab to access your current logs or to operate your station from difference computers.

I hope that this overview of the DXLab suite will encourage our readers to give it a try. Anita (AB1QB) and I have successfully used  the DXLab suite with our station for several years now. It does a great job automating many aspects of our Amateur Radio operations, QSL’ing and award management. It easily handles the complexities of our multi-operator station and it also handles logging and QSL’ing for multiple call signs that Anita and I operate under. We also use DXLab for our portable, Field Day and mobile operations and it handles all of these scenarios very well.

DXLab was created, enhanced and maintained by David Bernstein, AA6YQ. He makes this excellent suite of software available as freeware for the benefit of the Amateur Radio community. The DXLab suite is available for download here. You can download a copy of our DXLab presentation (without the videos) here. The DXLab Yahoo! Group provides is a good place to seek support and answers to questions about DXLab. I hope that our reader will give the DXLab suite a closer look. For those who already use DXLab, we hope that you pick up some new ideas from how Anita and I use the suite as part of your Amateur Radio operations.

- Fred (AB1OC)

Operating Mobile HF – Working DX On The 80M Band


JA4FHE QSL

JA4FHE QSL

We have continued to gain experience with our recently completed mobile HF installation in our F-150 pickup truck. We have been working quite a bit of DX from our completed mobile station. Recently, I have been concentrating on the 80m band from the mobile station and have been pleasantly surprised with some great DX contacts on this band. The last two evenings around sunset here in New Hampshire, USA have been particularly good ones for 80m DX. This evening, I heard Aki-San, JA4FHE during a short errand just as we were one the grey line. I pulled over to the side of the road so that I could concentrate on the contact and turned on the amplifier (450W). After a few tries, Aki-San came back to me and we completed the contact! This was my first contact to Japan ever on the 80m band and it was from the mobile!

JA4FHE's Antennas

JA4FHE’s Antennas

Aki-San has a capable antenna system including a 2-element yagi for the 80m band and his antenna system no doubt helped to make the contact possible. My received signal report was a 44 (he was 57 on my end) but the band was quiet and we were easily able to exchange names, signal reports and our callsigns.

OU5U's View

OU5U’s View

I have also been working quite a bit of DX on the 80m band from our mobile station into Europe. I recently encountered a nice group of fellows working a team effort on 80m. I was on the light side of the afternoon grey line here in New Hampshire, USA when I worked Henry, OU5U in Denmark from the mobile. It was a bit early for 80m but our signal reports at that time were 55 both ways (I worked Henry again from the mobile later in the evening on 80m and our reports were 59 both ways the second time). I also worked John, G4PKP in the United Kingdom, and Ian, GM4UYN in Scotland during this session. Signal reports ranged from 57 to 59+ both ways.

80m Ground Plane Antenna

80m Ground Plane Antenna

John, G4PKP was using an 80m ground plane antenna and he was putting a good signal into my mobile once we were on the dark side of the grey line.

Scorpion SA-680 Screwdriver Antenna

Scorpion SA-680 Screwdriver Antenna

I am quite surprised at what is possible on 80m using a short antenna. Our screwdriver antenna (a Scorpion SA-680) is set up with a 4 ft rod and a cap hat. The 4 ft rod/cap hat combination is electrically longer than the usual 6 ft whip that one might use on a screwdriver antenna and therefore requires less of the screwdriver antenna’s base loading coil to be used to tune the antenna to resonance. This significantly improves the overall efficiency of the combination.

Screwdriver Antenna Configured For 160m

Screwdriver Antenna Configured For 160m

We are moving into the best part of the year for operating on the low bands here in the Northeastern, USA. The days are short and the 80m and 160m bands are quiet at night. I plan to concentrate on 160m next and see what sort of results we can achieve using our mobile station on the Top Band.

- Fred (AB1OC)

Operating Mobile HF – Working DX


ZS2XD Antennas

ZS2XD Antennas In South Africa

It is still early days for operating mobile HF now that our setup is complete. I am continuing to make adjustments to improve performance. I had a chance to operate mobile from New Hampshire, USA this evening made some interesting contacts. I began by calling CQ on 20m SSB. I was operating with the amplifier on at about 325W output. I had a pileup almost immediately and worked about 20 contacts over about 40 minutes. Early on in the pileup, I had several stations in Europe call me. I also had ZS2XD, Gerry in South Africa answer my CQ! The signal reports for our QSO were 59 both ways and I was able to have a nice conversation with Gerry. We were both surprised that the contact was as solid as it was. Gerry has a good antenna system on his end and I was on the grey line which no doubt helped.

HL4FUA Antennas

HL5FUA Antennas On Ullung Island, South Korea

Later in the evening I decided to tune across the 40m band where I encountered Choi, HL5FUA on  Ullung Island (AS-045), South Korea calling CQ. He was working stations all around the world and had a decent pileup going. I set my drive to produce about 425W out and called him. To my surprise, he came right back on the first try! The signal reports for our QSO were 56 both ways. I believe that he was working the USA long path over Europe. Choi has a good directional antenna and was using some power. This combined with my being just on the dark side of the grey line certainly helped.

With these contacts, I have worked a total of 95 DXCCs mobile HF from our truck. I continue to be surprised at how well a properly installed mobile HF setup works. Our results are also a testament to the efficiency of the Scorpion SA-680 Screwdriver Antenna that we are using. I plan to concentrate on the low bands (80m and 160m) and see what sort of DX is possible on these bands.

- Fred (AB1OC)

Mobile HF Installation – Part 4/4 (500W Amplifier, 160M and Accesories)


Scorpion SA-680 Screwdriver Antenna

Scorpion SA-680 Screwdriver Antenna Setup for 80m – 15m

This article will cover the completion of our Mobile HF project. Our installation is fairly complex so we’ve broken the project into several phases:

The first step in this part of our project was to add upgrades to our Scorpion SA-680 Screwdriver Antenna to enable it to be used on 160m.

Screwdriver Antenna Configured For 160m

Screwdriver Antenna Configured For 160m

Ron at Scorpion Antennas makes an add-on coil unit to enable his 80m – 10m antennas to work on 160m. The picture above shows the add-on coil installed along with a 3 ft rod and Cap Hat. The coil adds additional base loading inductance to enable the antenna to work on 160m.

Antenna Base With Shunt Coil Switching Unit

Antenna Base With Shunt Coil Switching Unit

A different shunt coil is required to get the 160m configuration to tune up properly. Ron makes a very nice shunt coil switching unit (the grey box attached to the base of the antenna in the picture above) to allow multiple shunt coils to be used.

Antenna Shut Coil Switching Unit

Antenna Shut Coil Switching Unit

The unit contains two shunt coils (one for 160m and one for 80m/40m) and a 12V relay. The relay switches in the appropriate shunt coil under the control of a switch that I’ve added to our truck’s console. After properly adjusting both shunt coils, I was able to get a good match (SWR < 1.4:1) across the 160m, 80m and 40m bands.

The next step in this phase of our project was the installation of a mobile HF amplifier and some accessories to make the operation of our mobile HF station easier. As Alan Applegate (K0BG), author of the excellent K0BG.com website on mobile HF points out, installing an amplifier in a mobile application is not a trivial project. One must pay a great deal of attention to the following areas:

  • Beefing up the vehicle’s electrical system to be able to supply adequate 13.8V power (a 500W mobile amplifier will require 60A – 80A of sustained current when transmitting at full output and may draw close to 100A on peaks).
  • Proper physical mounting and adequate cooling to dissipate the heat generated (a 500W amplifier will generate approximately 500W of heat when operating at full output)
  • Proper choking of antenna control leads to ensure that conducted RF does not get into your vehicle or electronics (this areas was covered during the installation of our Screwdriver Antenna)
  • Drive/output power and SWR monitoring to ensure that the amplifier is not over driven and is working into a properly tuned and matched load

I am going to cover each of these points as they were handled in our installation.

Secondary Battery And Fuses

Secondary Battery And Fuses

It’s important that your vehicle’s alternator is capable of supplying enough current to operate the amplifier and the rest of your vehicle’s electrical system with overloading or major drops in voltage. We were fortunate that our F-150 Truck came with a 150A alternator from the factory. The next problem to solve is to provide 100A+ of peak current during transmit without excessive voltage drop (you want to have no more than 0.5V of drop between your primary battery and the power terminals of your amplifier). The easiest way to achieve this in our application was to install a secondary battery in the bed of our truck. We choose an Optima Red-Top series battery for both the secondary battery and as a replacement for our truck’s primary battery. The Red-Top series provides very high current for short periods of time (ex engine cranking). This profile is ideal of supplying a mobile amplifier. Both batteries are connected in parallel with custom-made 2 ga cables for both +13.8V and ground. The batteries must be identical when connected this way to ensure that differences in operating voltage do not result in uneven charging. It is also critically important for safety reasons to properly fuse the connections between the batteries at both ends and in both the +13.8V and ground leads! We used high current fuses (the insulated holders to the right of the battery in the picture above on both ends of the battery cabling. If either cable becomes shorted to the other or to ground, the fuses by the batteries will blow and prevent a fire. It’s also important to securely mount the batteries and the associated cabling and to properly protect the battery cables.  We used insulated cable clamps and convoluted tubing to accomplish this.

Ameritron ALS-500M Amplifier And Radio Interface

Ameritron ALS-500M Amplifier And Radio Interface

The next step was to select a location for the amplifier that enabled good air flow around the unit and to securely mount it to the floor of the truck. The spot that we choose was under the flip-up rear seat of our truck. The mounting location we used is at the corner of the seat which ensures good airflow around the unit. We also made an aluminum plate that sits between the amplifier and the carpet in the truck to ensure that cool air can circulate under the amplifier without being blocked by the carpet. The Ameritron ALS-500M Amplifier which we used comes with mounting brackets that allow it to be securely screwed to the floor of the truck so that it does not become a safety hazard during a quick stop, etc. We also installed an Ameritron ARI-500 Radio Interface Unit which provides automatic amplifier band switching and a keying interface for our Icom IC-7000 Transceiver.

Amplifer And Accessories Under Rear Seat

Amplifier And Accessories Under The Rear Seat

The picture above shows the location of the amplifier under the rear seat. Note the clear path that the vents in the case have to the air which circulates within the vehicle. There are air conditioner vents behind the front seats in the center console which can direct cool air on the amplifier during warm conditions.

Power Distribution, Antenna Controller And Wattmeter Sensors

Power Distribution, Antenna Controller And Wattmeter Sensors

The picture above shows the layout of all of the power and accessory electronics in our installation. Note the two high current fuses which protect the power connections between the amplifier and the secondary battery. We also installed a RIGRunner 4005 Power Distribution Block to supply 13.8V fused power to all of our accessories. We again used black convoluted tubing to protect all of the cabling and to dress up the installation.

Wattmeter Sensors And Screwdriver Antenna Controller

Wattmeter Sensors And Screwdriver Antenna Controller

The picture above shows the remote sensors (left) for the Elecraft W2 Wattmeter that we are using in our installation. A separate sensor is used on the input (200W range) and the output (2Kw range) side of the amplifier so that we can accurately set our drive power as well as monitor the amplifier’s output power and the SWR which is being presented by our antenna.

The TuneMatic unit is an Automatic Screwdriver Antenna Controller. This unit senses the frequency that our radio is operating on and automatically adjusts our screwdriver antenna to provide a good match. It also has auto-tune capabilities and includes an amplifier key line interrupter relay to ensure that we do not transmit high power into the antenna while it is being tuned.

Control Layout On F-150 Console

Control Layout On F-150 Console

All of the controls for the Amplifier, Screwdriver Antenna Controller and the Elecraft Wattmeter are mounted next to the driver on the F-150’s shifter console. We used heavy-duty Velcro strips to mount everything. The device in the right foreground is a Remote Control Unit for the Amplifier. The device in the left foreground is the control head for the TuneMatic Screwdriver Antenna Controller. Just behind the Screwdriver controller unit is a lighted 13.8V switch which we installed in the console to switch the shunt coil relay between the 160m and 80m/40m shunt coils. Finally, the unit in the background is the Elecraft W2 Wattmeter.

Antenna Controller, 160m Shunt Coil Switch, And Amplifier Remote Unit

Antenna Controller, 160m Shunt Coil Switch, And Amplifier Remote Unit

The TuneMatic Antenna Controller will automatically adjust our screwdriver antenna with a simple touch to the Tune (TU) button when the radio frequency is changed. This unit can also be used to manually move the antenna up or down to fine tune the match. There is also an auto-tune function which works well. An antenna controller such as the TuneMatic makes changing bands and frequencies much safer and easier to do and ensures that one keep their eyes on the road.

The Ameritron ALS-500RC unit provides a switch to enable or reset the amplifier if it should trip as well as a remote current meter which shows how much current the amplifier is drawing.

Elecraft W2 Wattmeter

Elecraft W2 Wattmeter

The Elecraft W2 Wattmeter worked out well in our mobile HF application. One can easily select the input or output sensors and its auto-ranging features provide accurate power and SWR readouts. It also has an LED brightness adjustment which is nice to have when operating at night.

Voltage Monitor

Voltage Monitor

It’s important to be able to monitor your vehicle’s voltage when using an amplifier. The heavy current demands of an amplifier at full power output can cause significant voltage drops, especially if the vehicle is idling and other power accessories like de-icers or seat heaters are in use. I found a simple and inexpensive solution for voltage monitoring – a unit which plugs into the cigarette lighter jack in the vehicle. The unit has an easy to ready display and it does not draw much current so it can be left plugged in when our truck is parked.

It took a little time to setup the TuneMatic Antenna Controller to quickly adjust the Scorpion Screwdriver antenna on all the bands from 160m – 10m. The instructions which come with the unit explain this process and it is not difficult to do. The TuneMatic must be configured to work with your particular screwdriver antenna when it is first installed. This involves setting some option switches and adjusting a pot inside the TuneMatic unit. Again, the instruction cover the setup steps well.

Icom HM-151 Microphone

Icom HM-151 Microphone

The Icom IC-7000 Transceiver is an excellent radio for mobile HF applications. Unfortunately, the quality of the transmit audio with the “stock” Icom HM-151 microphone which comes with the radio is less than ideal. To solve this problem, I sent my HM-151 microphone to Bob Nagy (AB5N) for some upgrades. Bob performed a number of upgrades which included replacing the element with a higher quality unit, installing a heavy-duty PTT switch, weighting and vibration deadening the housing and other mods. After adjusting the equalization in the IC-7000 to match the new element, we are getting some very nice reports on our audio quality from the stations that we are working while mobile.

You can click on the above video to hear what our mobile HF station sounded like in Europe during some initial testing with the new amplifier and upgraded microphone. We were still adjusting the audio settings when the recording was made but it will give you an idea what the setup sounds like on the air.

There was quite a bit of integration and working with the folks at all of the companies who supplied the components for our mobile HF project. Ron Douglas at Scorpion Antennas, Mike at Ameritron, Jim at TuneMatic, Bob Nagy (AB5N Microphone Upgrades) and the folks at DX Engineering were all very helpful in answering our questions and getting everything to work together.

Scorpion Whip Quick Disconnect

Scorpion Whip Quick Disconnect

We are operating across a very wide range of bands (160m – 10m) and I’ve found that it best to use a range of “whips” on our screwdriver antenna to cover all the bands. The Scorpion Quick Disconnects make changing “whips” a snap. Our “go to” configurations are as follows:

  • 160m - We use the add-on 160m coil plus a 3 ft rod with a Cap Hat. The Cap Hat makes the rod appear electrically longer and this improves overall efficiency on the Top Band. This combination allows the antenna to be tuned for all but the top 50 kHz (above 1.950 MHz) of the 160m band.
  • 80m – 15m including 30m and 17m - We use a 4 ft rod with a Cap Hat. This combination is very efficient and our results on 80m have been particularly good. I am able to work DX from New England, USA into Europe on 80m with 100W (amplifier off) using this combination. The 4 ft rod/Cap Hat combo is electrically too long to tune above the 15m band. The 3 ft rod/Cap Hat will tune up on the 12m band but not on 10m.
  • 12m and 10m – We use a 6 ft whip for these bands.

We really like the combinations which utilize a Cap Hat. These setups are definitely more efficient than the 6 ft whip and the overall height of the combination is low enough to stay out of the low tree branches here in New England, USA. The Cap Hat combinations allow less of the screwdriver antenna’s coil to be used. The coil is one of the largest sources of loss in a well installed screwdriver antenna setup and this is why the Cap Hat/short rod combinations work so well.

It’s nice to have the extra power when operating from our truck and I find that I can call CQ and sometimes generate a pileup while operating mobile! I’ve also been working quite a bit of DX from our mobile HF station (95 DXCCs worked so far) and the improved antenna and the added power has certainly helped in this area as well.

We hope that you have enjoyed our series of articles on our Mobile HF project. We have learned a great deal doing the project and we’ve made over 600 contacts from our truck along the way with many more to come.

- Fred (AB1OC)

AB1QB Enters The 2014 JARTS RTTY Contest – Our First Use Of N1MM+


AB1QB In 2014 JARTS Contest

AB1QB In 2014 JARTS Contest

One of Anita’s (AB1QB) favorite contests in the JARTS RTTY Contest. We decided to use the new N1MM+ Logger for the first time in this contest. There are many new features and improvements in N1MM+. A summary of N1MM+’s enhancements can be found here. We opted to do a completely clean installation of N1MM+ (rather than upgrading our existing N1MM Classic installation) to avoid any issues related to an upgrade scenario and to clean up any lingering issues with the software that we use with N1MM. We did save our N1MM Classic databases from previous contests and we imported those into N1MM+ after the upgrade. This process went very smoothly and we are finding N1MM+ much less difficult to configure and use. We also did clean installations of the MMTTY and 2Tone RTTY programs that we use along with N1MM+.

N1MM+ Setup On Dual Monitors

N1MM+ Setup On Dual Monitors (click to enlarge)

Having plenty of screen space really helps with our computer assisted style of operating. Each of our two operating positions has a PC with dual monitors and we made good use of the display space to organize all of the information that N1MM+ provides. The picture above shows the N1MM+ screen layout that Anita used for the contest (the following screen shots were taken after the contest so as not to interfere with Anita’s operations in 2014 JARTS RTTY).

N1MM+ Setup - Left Monitor

N1MM+ Setup – Left Monitor (click to enlarge)

Anita’s left monitor contains the N1MM+ and related windows that Anita used most during contest operations. You can see the MMTTY and 2Tone RTTY decoder windows in the right middle of the screen in operation on a RTTY signal that we are receiving. The windows to the left of the decoders are the N1MM+ Digital Interface windows which show the received text as it is decoded. It is common to use multiple decoders in a RTTY contest to maximize the chances of a good decode in marginal or noisy band conditions. MMTTY and 2Tone are set to use different decoding algorithms and each will work better in certain conditions than the other. The windows in the upper left and lower left of the screen provide a summary of available QSOs and multipliers based upon spotting cluster data and real-time contest information and performance statistics vs. goals that Anita programmed based upon her experience with this contest from last year. The small window at the bottom/center of the screen is the Rotator Control Window which provides an interface between the rest of the N1MM+ software and our rotatable antennas which are controlled via our microHAM Station Master Deluxe Antenna Controllers. We had no problems at all getting N1MM+ to work well with our microHAM system including the SO2R and WinKey capabilities of our microHAM MK2R+ and the antenna controller capabilities of our Station Master Deluxe Antenna Controllers.

N1MM+ Main Window

N1MM+ Main Entry Window

The picture above shows N1MM+’s Main Entry Window in detail. If you are familiar with N1MM Classic, you will immediately notice that most of the capabilities that are most commonly used to operate in a contest have been consolidated in this window. You can now change bands and see overall status of available contacts from this window. The fonts (including size), colors and skins are all customizable in all N1MM+ windows including this one.

Digital Interface Window (MMTTY)

Digital Interface Window (MMTTY)

The Digital Interface Window provides a new mode (wrap-round) which does not scroll the text up when the window is full. This is a big help to avoid “moving target” issues when one is trying to click on a decoded callsign or exchange information to get it into the logger. You can also hover over a callsign in this window with the mouse and it will be automatically entered in the N1MM+ Main Entry Window and checked.

Callsign Check Window

Callsign Check Window

The Callsign Check Window provides multiple options for determining if a callsign is valid or making corrections. The decoding algorithms have been improved and possible alternative characters for unmatched letters are highlighted in color. You can also now select multiple sources for information to base callsign lookups upon – your current log, the SuperCheck Partial file, Telnet spots received over the last 48 hours, and your current Call History database.

N1MM+ Setup - Right Monitor

N1MM+ Setup – Right Monitor (click to enlarge)

The picture above shows the N1MM+ Windows on Anita’s Right Monitor. On the left is the Bandmap Window which shows callsigns that have been spotted or worked on the current band. Clicking on a callsign or your CQ frequency indicator in this window will tune your radio to that place on the band and load the appropriate callsign into N1MM+’s Main Entry Window. In the upper right is the Telnet Cluster Window which shows and filters spots as they are received from your favorite Spotting Cluster server.

Log Window

Log Window

The picture above shows a closeup of the Log Window. This window’s layout is much cleaner and easier to read in N1MM+. it’s also possible to make corrections in log entries by just clicking on the desired field in a log entry and typing in a correct value. This is a real time saver when trying to make real-time corrections during a contest.

Multipliers Worked Window

Multipliers Window

There are a number of different Multiplier Window formats and each is useful depending up the multiplier structure of a given contest. The example above shows DXCC entities by band which is the most useful format for the JARTS RTTY Contest. N1MM+ allows one to include a color coded mix of multipliers that have been worked, spotted but not yet worked, or those that you expect to be on the air based upon your logs from the same contest during previous years (or perhaps an “announced operations” list that you have received prior to the contest). This new format provides a much more useful view of the operator’s progress on multipliers during a contest.

Grey Line Map

Grey Line Map

N1MM+ also provides a useful Grey Line Map Window which shows the current Grey Line location as well as recent spots. You can determine the callsign for a given spot “dot” by hovering over it with your mouse. A nice enhancement here would be to support click on this map to turn your rotatable antennas to that direction to enable working a group of spotted stations. It would also be nice if a line showing the current antenna direction could be displayed on this map.

Contest Statics

Contest Statics

There are also some nice enhancements in the Contest Statics reporting capabilities including a color coded graphical format. The format of the graph can be customized using a set of drop down boxes.

Score Summary Window

Score Summary Window

All of the enhancements in N1MM+ add up to a big improvement in usability of this popular contest logger. Shown above is Anita’s final claimed score for the 2014 JARTS RTTY Contest. Her score this year was about 200% higher than last year and no doubt the improved N1MM+ logger (along with Anita’s increasing experience as a contest operator) get some of the credit. Anita is using N1MM+ as part of the 2014 CQ WW SSB DX Contest this weekend. Look for an article here in the near future on Anita’s experiences with N1MM+ in that contest.

What’s your favorite Contest Logging Software? To help us understand our readers interests better, please complete the poll above.

- Fred (AB1OC)

What Is DX’ing All About?


3B8FQ

QSL Card From Rachid, 3B8FQ, on Mauritius Island

I came across a great video this morning – an excellent introduction to DX’ing. For me, this video really communicates well what DX’ing is all about. Chasing DX is a part of our hobby that provides the chance to meet many new friends around the world, learn about culture and geography and make some amazing contacts. Take some time to watch the video – I think our readers will enjoy it!

- Fred (AB1OC)

Mobile HF Installation – Part 3/4 (Screwdriver Antenna Installation)


Icom IC-7000 Mobile HF Radio

Icom IC-7000 Mobile HF Radio

We have made some 250+ contacts using the Mobile HF setup in our Ford F-150 Truck. Our initial setup used an Icom IC-7000 Transceiver and HAM Stick Antennas. This combination enabled us to work quite a bit of DX from our truck (56 DXCC’s worked mobile HF to date). It is surprising how well a properly installed Mobile HF setup works. For more information on our Mobile HF installation project, see our other articles here -

It has been part of our plan to enhance our Mobile HF installation to include a Screwdriver Antenna and a Mobile Amplifier. This article cover the first of these upgrades.

Scorpion SA-680 Screwdriver Antenna

Scorpion SA-680 Screwdriver Antenna

We chose a Scorpion SA-680 Screwdriver Antenna for our project. Scorpion mobile HF antennas are among the best on the market in terms of quality and efficiency. The SA-680 covers all HAM bands from 80m – 10m (160m operation will also be added to this antenna – more on this in a later post). The SA-680 is also a good choice given our plans to add a mobile HF amplifier to our truck (the SA-680 is rated for 1500 Watts SSB PEP). We ordered our antenna with a flat black powder coated finish to match the color scheme on our truck. Scorpion antennas can accommodate a variety of whips and we have both 6 foot (supplied with the antenna) and 8.5 foot whips available. We also ordered a 3 foot long rod with a Cap Hat and this is the combination that we are currently using. This arrangement features improved efficiency due to the top loading of the antenna provided by the Cap Hat and a reduced height profile which is perfect for avoiding the low tree branches here in New England, USA. Ron Douglas, NI7J owner of Scorpion Antennas has been a great help providing lots of good advice to help us to install his SA-680 antenna properly.

BreedLove Folder-Over Antenna Mount

BreedLove Folder-Over Antenna Mount

The Scorpion SA-680 Antenna is a beefy unit and weights about 18 pounds. This antenna requires a strong mounting system for safety and reliable operation. We chose to mount our antenna in the bed of our F-150 Truck using a fold-over mount from Breedlove Antenna Mounts. This mount is made specifically for the Scorpion Antenna and uses 1/2″ thick aluminum plate with reinforcing bars that mount under the truck bed to ensure that the mount is rigid and does not crack the truck bed due to the load of the antenna. As you can see from the picture above, we cut the plastic bed liner which protects our truck’s body to allow the base of the antenna to sit on the truck body’s sheet metal. We used star washers between the mount and the bed to ensure that the mount made a good RF connection with the bed of the truck.

Antenna In Folder Down Position

Antenna In Folder Down Position

One of the nice features of this mount is its ability to be folded over to 90 or 45 degrees. This is done by loosening two large allen screws on the mount. The picture above shows the antenna folded over with the Cap Hat/Rod removed. In this position, we can close the roll cover on our truck’s bed to completely cover the antenna. This is great for taking the truck through the car wash or when we want to protect the antenna from the winter weather here in New England.

Scorpion Whip Quick Disconnect

Scorpion Whip Quick Disconnect

Removal of the Cap Hat/Rod or an attached whip is made easy by Scorpion’s Quick Disconnect. The ones on our antenna are made from stainless steel and allow easy removal of the Cap Hat Rod or a whip.

Control And Feedline Choking

Control And Feedline Choking

All Screwdriver antennas require control cables to operate a motor which raises and lowers the antenna to change the length of a base loading coil. This is how the antenna is tuned to operate on different bands and frequencies. The motor and associated control leads operate at a high RF potential relative to the vehicle’s ground. This is also a problem for the outside shield on the coax cable feeding the antenna. The RF potential on the control cables and feedlines must be choked or it will enter the vehicle and cause all manner of RFI problems. Proper RF choking is especially important in our installation as we plan on running high power via an amplifier. To ensure proper choking, we built a series of RF chokes for the six control lines from the antenna – one pair for the 2 motor leads, one pair for the 2 pulse count leads that are used to sense the position of the antenna, and one pair for a future shunt coil relay to enable 160m operation. These chokes were built according to the information on K0BG’s excellent Mobile HF website. Each pair of control leads were run through two separate chokes at the base of the antenna (two chokes were used to due to the planned high-power operation with an amplifier). Two chokes were also used on the RG-8X feedline. For the initial installation, the supplied shunt coil (copper coil on the left side of the antenna base) was used to match the antenna on 80m and 40m. The coil was adjusted using the procedure on K0BG’s website to achieve a good match on these bands. Also note the ground strap (visible to the left of the fold-over base). This connects to one of the button head screws at the base of the antenna and to the ground point on the antenna mount to ensure a good ground between the antenna and the truck.

Chokes Inside The F-150

Chokes Inside The F-150

Another set of control cable and feedline chokes were made and installed at the point where the antenna cables and feedline enters the vehicle. The picture above shows some additional detail on how the chokes are made. It is important that the chokes be at the same point on each of the control cables and coax feedline so that any RF induced on the cables does not couple from one cable to another and bypass the chokes.

Additional Bonding and Cables Mounting

Additional Bonding And Antenna Cable Mounting

I decided to do some additional work on the bonding of the bed of our truck to the rest of the F-150. This involved installing 4 bonding straps between each corner of the F-150’s bed and the frame. I used the excellent strapping material from Electric Motion for this purpose. This strapping features eyelets which are installed every 3 inches along the strapping material. This made attachment of the strapping to the F-150’s bed and frame easy to do via self-taping stainless steel screws and star washers. A liberal coating of Ideal NOALOX was used on each of the screws and washers to protect against corrosion. Also note the convoluted tubing which houses the antenna control leads and feedline running along the frame. The tubing protects the antenna’s cabling and feedline from the weather and enables secure mounting to the vehicle’s frame.

Screwdriver Antenna Manual Controller

Screwdriver Antenna Manual Controller

The final step in the installation was to connect the antenna control cables to Scorpion’s antenna control switch and mount the switch on the console with velcro strips. This switch is used to raise or lower the antenna, changing the length of the loading coil to tune the antenna for different bands and frequencies. I also installed crimp-on connectors on the RG-8X feedline and connected it to the radio and to the antenna. A quick check of the antenna’s SWR on 20m confirmed that the antenna and feedline were working correctly.

I was able to make contacts on the 17m, 20m, 40m and 80m bands with the new antenna last evening and it works great. I am particularly pleased with the antenna’s performance on 80m. I made several contacts on this band out to about 2,000 mi and was receiving signal reports ranging from 58 to 59+20dB. These results are very good considering the short length of the antenna’s Cap Hat/Rod (only 3 feet) and that I was using only 100W.

*** Safe operation of your vehicle requires your full attention on the road. You SHOULD NOT try to tune your antennas or your radio while your vehicle is in motion. Safety requires that you perform these actions only when your vehicle is stopped and parked safely. ***

The antenna is easy to tune manually. One simply sets the radio to the desired band/frequency and then adjusts the antenna up/down until the maximum reading on the radio’s S-meter is obtained. This usually gets you to within a “coil turn” of the optimal tune-up. I then key the radio up and adjust the antenna up or down a bit to optimize the tune to the lowest SWR as indicated on the radio. The antenna’s tuning is not critical on 20m and higher bands. It is fairly sharp (due to the short length) on 40m and 80m so final adjustment to minimize the SWR is important on these bands.

It’s great to have the full set of Amateur HF bands available in the truck with the new antenna. Performance seems comparable to the Ham stick antennas I was using previously on the 20m and higher bands. I would say that this indicates that the efficiency of the Scorpion SA-680 is significantly higher than the Ham stick antennas because the Ham sticks where mounted dead center on the roof of my truck and about 3-4 ft higher than the Scorpion. While this location performed reasonable well on 20m and higher bands, it was not a very practical mounting location due to height problems and the difficulty in getting at the base on the antenna to change or remove the Ham sticks. Performance is also much better on the 40m and 80m bands with the new antenna. I would say that the new antenna is also somewhat quieter than the Ham sticks were. This is probably due to a combination of being further away from the engine and cab noise sources plus benefits due to the additional bonding work.

The next stage of our Mobile HF project will be the installation of a mobile amplifier, automatic antenna controller and 160m band add ons to the Scorpion antenna. I hope to work some of our readers on the HF bands from our truck soon!

- Fred (AB1OC)