Update on NARS Amateur Radio Expo for Young People

Source: Update on NARS Amateur Radio Expo for Young People

The Nashua Area Radio Society will again be hosting an Amateur Radio Exposition for Young People as part of NEAR-Fest in Deerfield, NH on October 12th and 13th.

You can see more about what we are planning via the link above. Activities will include multiple GOTA Stations, a Kit Build, a Fox Hunt, Morse Code, and other hands-on activities. We will also be operating a Special Event Station as N1T.

NEAR-Fest along with several NARS members are also sponsoring a matching fundraising project as part of this event. Check it out!

Fred, AB1OC

Please Help Us Grow the Amateur Radio Service

Graduates from our Summer Youth Technician License Class

Source: Support the Nashua Area Radio Society on Amazon Smile and GoFundMe

Anita and I have been working to grow the Amateur Radio Service through our work at the Nashua Area Radio Society. The Nashua Area Radio Society is a 501c(3) public charity whose mission is to:

  • Encourage and help people to become licensed and active in the Amateur Radio Service
  • Spark Interest among Young People in STEM Education and Careers through Ham Radio
  • Provide training and mentoring to enable our members to improve their technical and operating skills and to be prepared to assist in times of emergency
  • Sponsor on-air operating activities so that our members may practice and fully develop their operating skills and have fun with Ham Radio!
Students and Teacher Ready To Launch Their High-Altitude Balloon

Students and Teachers Ready To Launch Their High-Altitude Balloon

The Nashua Area Radio Society has created many programs designed to provide STEM learning experiences and training through Amateur Radio. Some of these include:

To carry out our mission, we have formed close relationships with several schools. This helps us develop and deliver effective, high-quality programs that bring learning through Amateur Radio to young people. You can read more about what we’re doing via the link at the top of the page.

We provide many of these services either free of charge or at a very modest cost. We count on the generosity of our members, friends, and the Amateur Radio community to raise funds to support our work.

We hope that our readers will consider supporting our work at the Nashua Area Radio Society by using Amazon Smile and designating us as your favorite charity and/or by making a donation to our current fundraising campaign (click on the badge below).

GoFundMe Badge

Amazon Smile is free and it’s easy to set up and use (click here for setup information).

On behalf of the many young people and others that we help, thank you very much for your interest and support. We will continue to work hard to provide learning opportunities for young people through Amateur Radio and to continue to make the Amateur Radio Service the best it can be to benefit everyone.

Fred, AB1OC

Fall Youth Events at Boxboro and NEAR-Fest

Quite a few Nashua Area Radio Society members have been working on a display to get young people and potential new Hams interested in Amateur Radio. Our display will be part of the New England Amateur Radio Convention in Boxboro, MA on September 8th and 9th. We are also planning a similar display for NEAR-Fest at Deerfield Fairgrounds, NH later in the fall. You can see more about our planned display and the associated hands-on activities via the following link.

Source: Fall Youth Events at Boxboro and NEAR-Fest – Nashua Area Radio Society

I want to share some information about an Amateur Radio event that we will be doing at the Boxboro, MA Ham Radio Convention in September. Our display and hands-on activities provide an introduction to Amateur Radio for young people and include information and a chance to try Amateur Radio activities such as:

You can read more about our plans for the event via the link above.

Morse Trainer Kit

Morse Trainer Kit

We’ve been working with Steve Elliot, K1EL to develop an inexpensive kit building project to include as part of our displays. We will be including a new kit building activity in as part of our display. Builders can purchase the Morse Trainer Kit shown above for $20 and build it at the show. We will provide soldering equipment and kit building mentors to help builders complete their kit. The package includes batteries and a printed manual. We will have these kits available for walk-up purchase at the show on both Saturday and Sunday.

I am also planning to provide forum presentation on the following topics on Saturday at Boxboro:

  • Creating Successful Youth Outreach Projects
  • Portable Satellite Station Design, Operation, and Planning for an upcoming ISS Crew Contact
  • STEM Learning for Young People via High Altitude Balloons Carrying Amateur Radio

You can view the Boxboro Forum schedule here.

I hope to see folks who follow our Blog at the New England at the Boxboro Convention. If you can make it, stop by our display or visit us in the forums and say “hello”.

73,

Fred, AB1OC

 

A Portable Satellite Station Part 6 – 3.0 Station Initial Contacts

Tech Class First 3.0 Portable Station Test

Tech Class First 3.0 Portable Station Test

With the construction of our Portable Satellite Station 3.0 complete, we’ve been looking forward to an opportunity to test the new setup. We chose the Nashua Area Radio Society’s recent Technician License Class as a good time to both test the new stations and to acquaint our Tech Class grads with one of the many things that they can do with their new licenses – amateur satellite operations.

Tech Class 3.0 Portable Satellite Antenna Test

Tech Class 3.0 Portable Satellite Antenna Test

The first transport of the new 3.0 station antenna system turned out to be simple. The booms and counterweights of the new antenna system are easily separated via the removal of a few bolts located at the cross-boom. This allowed the antennas feed-points, rotator loops and polarity switching connections to be removed and transported as complete assemblies. The separation of the longer-boom antennas into two sections also made transporting the antennas easier and made the antenna elements less prone to bending in transport. Setup and cabling of the new 3.0 antenna system as the class site was quick and simple.

The opportunities to make contacts during our Tech Class were limited but the new system performed well with one exception. We saw a higher than expected SWR readings on the 70cm yagi during transmit. We immediately suspected problems with one of the N connectors that were installed during the construction of the new system (component testing during assembly showed the SWR readings on the 70cm side of the system to be in spec.).

Portable Satellite Station 3.0 Antenna System

Portable Satellite Station 3.0 Antenna System

After the class, we set up the 3.0 system again at our QTH. Transport and re-assembly of the new system are somewhat easier and faster than our 2.0 portable station antenna setup is.

Satellite Antenna System 3.0 Connections

Satellite Antenna System 3.0 Connections

The 3.0 antenna system uses a similar connector bulkhead approach that we used previously. The rotator controls are handled via a single, 8-conductor cable and we have a new connection for the polarity switching controls on the 3.0 system yagis.

Rotator Loop Coax Retention System

Rotator Loop Coax Retention System

We have had some problems with the connections between the preamplifiers mounted at the antennas and the rotator loops which connect the antennas to them. This problem caused several failures in the associated N-connectors on the 2.0 portable antenna system so we fabricated a simple arrangement to prevent the rotation of the antennas from turning the coax inside the N-connectors and causing these failures.

70cm Yagi SWR in the Satellite Sub-Band

70cm Antenna and Feedline SWR in the Satellite Sub-Band

Some isolation tests were performed on each cabling element of the 70cm side of the 3.0 antenna system and this resulted in the location of an improperly installed N-connector. The faulty connector was easily replaced and this corrected the SWR readings on the 70cm side of the antenna system. The image above shows the SWR readings for the 70cm antenna after the faulty connector was replaced. We checked the SWR performance with the 70cm yagi set for both Left-Hand and Right-Hand Circular Polarization and we saw good results in both configurations.

2m Yagi SWR in the Satellite Sub-Band

2m Antenna and Feedline SWR in the Satellite Sub-Band

We also re-checked the SWR performance of the 2m side of the antenna system with the 2m yagi in both polarity settings and it looked good as well.

Portable Satellite Antenna 3.0 Az-El Rotator

Portable Satellite Antenna 3.0 Az-El Rotator

The 3.0 antenna system uses an Alfa-Spid rotator. The Alfa-Spid can handle the additional weight of the larger yagis and has a more precise pointing ability (1° accuracy) which is helpful given the tighter patterns of the larger, 3.0 yagis.

70cm Yagi Switchable Polarity Feedpoint

70cm Yagi Switchable Polarity Feedpoint

The new yagis in the 3.0 antenna system have feed point arrangements which allow the polarity of the yagis to be switched between Left-Hand Circular Polarity (LHCP) and Right-Hand Circular Polarity (RHCP). These antennas used a relay arrangement at the feed-points that flip the polarity of one plane of the yagis by 180° which in turn changes the polarity of the antennas between LHCP and RHCP.

Portable Satellite Station 3.0 Radio and Controls

Portable Satellite Station 3.0 Radio and Controls

With the SWR problem corrected, we set up the 3.0 station radio and controls. The 3.0 station adds our homebuilt PTT Router and the control box from DXengineering which controls polarity switching. Also, the Green Heron rotator control box has been configured to control the new Alfa-Spid rotator.

POrtable Satellite Station 3.0 Computer Control via MacDoppler

Portable Satellite Station 3.0 Computer Control via MacDoppler

We are continuing to use the excellent MacDoppler software to control the 3.0 station. MacDoppler provides tracking controls for the antennas and doppler correction for the Icom-9100 transceivers uplink and downlink VFOs.

Satellite 3.0 Station Control Details

Satellite 3.0 Station Control Details

The image above shows a closer view of the 3.0 station controls. The box in the middle-left with four LEDs and the knob is used to select one of four polarity configurations for the 2m and 70cm yagis – RHCP/RHCP, LHCP/RHCP, RHCP/LHCP, or LHCP/LHCP. Just to the right in the middle stack is our homebrewed PTT Router which expands and improves the PTT sequencing performance of the station.

So how does the new 3.0 station perform? The new antennas have a tighter pattern requiring careful pointing calibration of the rotators during setup. This is easy to do with the Alfa-Spid rotator. The new antennas have noticeable more gain as compared to the LEO pack used on the 2.0 station. We are also surprised to see how much difference the polarity switching capability makes in certain situations – sometimes as much as two S units (12 dB) in certain situations. The combination of the new antennas and selection of the best polarity combination allows solid operation on many satellites passes with as little as 2 watts of uplink power. We have made a little over 50 QSOs on the new 3.0 station so far and it works great! For more information on the Portable 3.0 Station as well as the 2.0 and 1.0 stations that we’ve built – see the links below:

Fred, AB1OC

 

PTT Router for Satellite Station 3.0

ARR Satellite Preamp

Advanced Receiver Research Remote Preamp

Our Satellite Station 2.0 antenna system uses a pair of Advanced Receiver Research Remote preamplifiers at the antennas to boost weak signals. These preamps have RF sensing and switching to protect them during transit. While this system works well; we are always concerned about the impact of the RF power affecting the long-term reliability of these devices and the associated radio equipment.

M2 Antenna Systems S3 Sequencers

M2 Antenna Systems S3 Sequencers

Our Satellite Station 2.0 uses a pair of M2 Antenna Systems S3 Sequencers to control the preamps remotely. For U/V and V/U mode satellites, it’s a simple matter to turn off the uplink band preamp to protect it against RF during transmit. The problem with this approach comes when working satellites and the International Space Station in simplex (single band) modes. In these situations, we need a solution which keys the sequencers externally so that the sequencers can properly control the changeover of the preamps from receive to transmit mode before keying our radio (an Icom IC-9100). We also wanted a solution which could also allow the radio initiate the keying of the sequencers for CW break-in keying and digital modes.

PTT Router

PTT Router

Our solution was to design and build a simple Push-To-Talk (PTT) router. This device allows an external source such as a footswitch or a trigger switch to initiate the keying. The design also includes indicators which confirm that the keying sequence has completed.

PTT Router Schematic Diagram

PTT Router Schematic Diagram

Our first step was to create a simple design which allowed for either an external switch or the radio to initiate keying. The PTT source switch (S1) selects the keying source and uses the Hsend  (2m key) and Vsend (70cm/1.2 GH key) lines on the Icom IC-9100 accessory jack as either the means to key the radio or the means to detect that the radio has initiated a transmit keying sequence. A second switch (S2) selects which VFO is keyed when the keying source switch (S1) is in External mode. Finally,  indicators for power and keying complete were added.

Rear Panel Connectors

Rear Panel Connectors

A small enclosure was used to house the switches, indicators, and the connections to the rest of our Satellite Station. The image above shows the rear-panel connections to external PTT sources, the S3 Sequencers, the IC-9100 Radio, and a 12 Vdc station power source.

PTT Router Internal View

PTT Router Internal View

A pair of terminal strips were mounted inside the enclosure to make connecting all of the components easier. The wiring is pretty dense around the front and rear panels so connections were insulated with heat shrink tubing. A small PCB could easily be created to make replicating the prototype easier should we decide to build more copies of the design.

Satellite Station 3.0 Controls

Satellite Station 3.0 Controls

Our new PTT router was easy to integrate into our Satellite Station 3.0 setup. Integration required some custom cables to be made to connect our PTT router to the sequencers and to the accessory jack of the radio. With the integration completed, we are now able to properly sequence the control of the preamps and the radio in all modes of operation. Here are some more articles which include more about our portable satellite stations –

Fred (AB1OC)

DX Alarm Clock Part 2 – Hardware

The DX Alarm Clock

The DX Alarm Clock

I recently wrote a blog article about the DX Alarm Clock software – here is Part 2 of the Series on the how I built the hardware for the DX Alarm Clock.

DX Alarm Clock Hardware Components

The DX Alarm Clock is based on a Raspberry Pi 3 computer and an Adafruit Pi-TFT Touch Screen Display.  The list of components, along with links is below.  Since I built the Raspberry Pi almost a year ago and technology is always advancing, some of the parts are no longer available or have better replacements available.  I’ll provide information on what I used and a recommended replacement.  Approximate prices are included.

 

Rapberry Pi 3

Rapberry Pi 3

 

Motherboard: Raspberry Pi 3 ($35) – includes a 1.2 GHz 64-bit quad-core ARM CPU, Build in WiFi, Ethernet, 4 USB Ports, an HDMI port and audio port (3.5″) and Bluetooth.

Also you will need a power adapter  ($10) and Class 10 Micro SD card ($15) for the Raspberry Pi.  Ours is a SanDisk Ultra 64GB Micro SD Card.

Pi-TFT Touch Screen Display

Pi-TFT Touch Screen Display

Display: Adafruit Pi-TFT 2.8″ Display with Capacitive Touch Screen ($45).  A slightly larger, 3.5″ display is now available.

PiBow Case

PiBow Case for Raspberry Pi and Touch Screen Display

Case: Pimoroni PiBow Case for Raspberry Pi and Pi-TFT Display($20)

Kinivo Speaker

Kinivo Portable Speaker

Portable Speaker:  Any small portable/rechargeable speaker will do.  Mine is a Kinivo, but it is no longer available.  Any small speaker will do as long as it is Bluetooth or has a 3.5″ stereo connector.

 

Raspberry Pi Development Environment

Raspberry Pi Development Environment

Raspberry Pi Development Environment

After constructing the Raspberry Pi, case and TFT Display, the next step was to connect it to a monitor via the HDMI port, a mouse via one of the USB ports and to a Bluetooth keyboard.   Then I loaded the Raspbian Operating System onto the Raspberry Pi via the micro SD card.  I first copied the OS to the Micro SD card using a PC or Mac and then inserted the card into the Raspberry Pi and booted from it.  You can find a good tutorial on how to do this at https://www.raspberrypi.org/learning/software-guide/quickstart/

Once Raspbian is installed, you will have a windows like GUI (Graphical User Interface) environment with a web browser, and a number of additional applications included.

This gave me a development environment that I could use to build and test the DX Alarm Clock software.  I used the Python language to develop the software.  I used the Python IDLE development environment, which is included in the Raspbian OS.

Interested in Raspberry Pi Amateur Radio Projects?  See the article on a Raspberry Pi Satellite Rotator Interface.

Raspberry Pi Satellite Rotator Interface

MacDoppler and GHTracker

MacDoppler and GHTracker

We’ve been using our Portable Satellite Station 2.0 for some time now and it works great. One area that can be improved is the interface between the MacDoppler Satellite Tracking program we use and the GHTracker application which controls the Green Heron Engineering RT-21 Az/El Rotator Controller in our setup. Our initial approach was to run the GHTracker app under Windows/VMWare on the same MacBook Air laptop that runs MacDoppler. While this approach works ok, it was more complex and less reliable than we had hoped.

Fortunately, the interface between MacDoppler and GHTracker uses a UDP-based interface which will run over an IP network.

GHTracker Running On A Raspberry Pi 3

GHTracker Running On A Raspberry Pi 3

Anita, AB1QB got great results using a Raspberry Pi 2 with a Touch Screen for her DX Alarm Clock Project so I decided to do something similar with GHTracker. The new Raspberry Pi 3 Model B boards feature a built-in WiFi networking interface and four USB ports which made the RPi 3 a perfect platform for this project. An email exchange with Jeff at Green Heron Engineering confirmed that GHTracker could be made to run under Linux on the Raspberry Pi (RPi).

We wanted a compact package that did not require anything but a power supply to run the final project. There are lots of great choices of parts to build a Raspberry Pi system. Here’s what we used:

Total cost for all of the parts was $120.

Assembly of the case and the hardware was straightforward. The folks at Adafruit provide a pre-built Jesse Linux image for the RPi which includes the necessary driver for the Touch Screen Display.

After a bit of configuration work and the creation of a few shell scripts to make it easy to boot the RPi to a HDMI display or to the Touch Display, we were ready to install the GHTracker App. we also enabled the VNC Server on the RPi so that we could use a VNC Client application on our MacBook Air in place of directly connecting a display, keyboard, and mouse to the RPi. Finally, we installed Samba on our RPi to allow files to be moved between our other computers and the RPi.

GHTracker Running on the Raspberry Pi

GHTracker Running on the Raspberry Pi

Jeff at Green Heron Engineering provided a copy of GHTracker V1.23 and the necessary serial interface library to enable its use on the RPi. Jeff is planning to make a tar file available with GHTracker and the library in the near future. We did some configuration work on LXDE (the GUI interface for Linux that runs on the RPi) automatically run GHTracker whenever the RPi is booted up. We also optimized the GUI for the sole purpose of running GHTracker on the Touch Screen Display. Finally, we configured the Ethernet and WiFi interfaces on the RPi to work with our home network and with our LTE Hotspot modem.

RPi GHTracker Test Setup

RPi GHTracker Test Setup

With all of the software work done, it was time to test the combination with our Satellite Rotator System. The setup worked on the first try using a WiFi network connection between the MacBook Air Laptop running MacDoppler and the RPi. The USB-based serial ports which control Azimuth and Elevation direction of the rotators worked as soon as they were plugged into the RPi. Also, the touchscreen interface works well with the GHTracker App making the combination easy to use.

MacDoppler and GHTracker via VNC

MacDoppler and GHTracker via VNC

The VNC Client/Server combination allows us to work with the software on the RPi right form our MacBook Air laptop. It also makes for a nice display for monitoring the GHTracker App’s operation from the Mac.

Other articles in the Portable Satellite Station series include:

You may also be interested in the satellite station at our home QTH. You can read more about that here.

Thanks to the help from Jeff at Green Heron Engineering, this project was very easy to do and worked out well. The Raspberry Pi 3 platform is very powerful and relatively easy to work with. It makes a great start for many Ham Radio projects. Also, there is a wealth of online documentation, how-to information, and open source software for the RPi. I hope that some of our readers will give the RPi a try!

Fred, AB1OC

Building An Amplifier

Elecraft KPA500 Amplifier

Elecraft KPA500 Amplifier

I have been planning to add a medium power HF Amplifier to our station for some time now. The plan was to use an amplifier of this type for two purposes –  as an amplifier for Anita’s (AB1QB’s) position at our home station and to have an amplifier that we could take along on DXpeditions and other portable operations. After doing some research, it looked like the Elecraft KPA500 Amplifier would be ideal for this. It is small in size, can operate using either 120 VAC or 240 VAC power and has a quite reasonable weight of 26 lbs.  After dropping some not so subtle hints, I received a KPA500 kit as a holiday gift.

The Elecraft KPA500 is a no-solder kit and requires 4 – 6 hours to assemble. Just for fun, I decided to make a time-lapse video of the assembly, checkout and an initial QSO with our KPA500.

The assembly of the kit was quite straightforward and I was able to complete it in about 5 hours. The amplifier worked fine after assembly. It  performs well on all of the Amateur Bands from 160m – 6m and delivers its rated output of 500 W with 25-35 watts of drive power. The initial QSO in the video was made using our Elecraft KX3 Transceiver which provides a maximum of 12 watts of drive power to the amplifier. As you can see in the video, the KPA500 produces about 200 w output using the KX3. I have also tested the KPA500 with a 100W transceiver and found that it produces the rated output on all of the bands and runs cool and quiet. Testing with my station monitor as well as on-air reports indicate that the KPA500 produces a clean signal.

I know that some of you may be wondering how I made the time-lapse video included in this post. I found a very good how-to webpage that explains how this is done and includes links to some good software choices to perform the various steps in the process. The software and hardware that I used are listed in the credits at the end of the video for those who are interested.

Time Lapse Video Setup

Time Lapse Video Setup

The basic setup requires a digital camera on a tripod that can take a series of still images at regular intervals. My video was created using a Nikon D7000 which took a still frame  every 5 seconds. The video required a total of about 3,900 individual photos to produce a 24 fps video that is about 2:40 minutes long. A combination of Batch Photo Editing (Adobe Lightroom), Time-Lapse Assembly, and Video Editing (Apple iMovie) tools were used to complete the project.

The plan is to couple the KPA500 with Anita’s new Flex-3000 Software Defined Radio (I got a not so subtle hint too). More on the Flex-3000 and its operation with the Elecraft KPA500 will be the topic of a future post.

– Fred (AB1OC)

Feedline Breakout System

Feedline Breakout System

Feedline Breakout System

Since Anita (AB1QB) and I both want to operate at the same time, we are planning to put two SteppIR DB36 Yagis on our tower. These antennas will be connected to a DX Engineering Stack Matching System so that they can be operated together as a 4 over 4 array. The DXE Stack Match can select either antenna individually and connect it to the feedline associated with the array but it does not provide breakout of both antennas onto separate feedlines. We designed and built a custom feedline breakout system to enable simultaneous breakout of both antennas to separate feedlines. This project involved the construction of both a tower mounted box to house a part of relays and a control box for the shack.

This device is inserted between the Stack Match and the antennas in line with the two phasing lines to each Yagi. It is critical that the breakout device provide identical impedance and phasing effects on both phasing lines if the array is to function correctly. To accomplish this, we selected a pair of Tohtsu Coaxial Relays (Model CX-800N) that have very low SWR impact in the HF bands. These were installed in an outdoor utility box that we got from DX Engineering. Only one relay is used to breakout the lower antenna to a separate feedline as the Stack Match can break out the upper antenna to the main feedline for the array. The reason that two relays are needed is to ensure that RF performance of both phasing lines to the two antennas is identical.

Coaxial Relay

Coaxial Relay

The relays require a 24V source to energize them. I built a simple control box for the shack to provide the needed control voltage. The controller includes three switches so that it can be used for additional 24V relay applications in the future.

Breakout Control Box

Breakout Control Box

I wanted to be sure that the Breakout System had good isolation characteristics between the two phasing lines so that the device did not allow a transmitter using one antenna to interfere or possibly damage a transceiver using the other antenna.. The relays we choose have good isolation characteristics which is a good start. To ensure that we have good isolation at a system level, I used an ArraySolutions Vector Network Analyzer (VNA) 2180 to measure the isolation between the various input and output connections in the Breakout System. The ArraySolutions VNA 2180 uses a PC and software to control a measurement unit which can perform one and two port SWR, impedance, loss and phase measurements (many other measurements are possible as well). In this case, we are making a port to port loss measurement.

Isolation Measurement Setup

Isolation Measurement Setup using a VNA

The VNA 2180 has a dynamic range of about 100 dB which means that it can measure isolation up to this level. As you can see from the following screen shot taken with the VNA software, the isolation of the Breakout System is very close to the limits that the VNA can measure. The worst case isolation measurement is about -97 dB on the 6m band. We also use Bandpass Filters when we are both operating and these filters provide an additional 55 dB or more of isolation which means we have a total of about 150 dB of isolation through this path. In the real world, the antennas themselves will likely have much less isolation between them than this so the isolation performance of the Breakout System should be more than adequate.

Isolation Measurement Results

Isolation Measurement Results

We are making good progress towards the planned installation of three of our Yagis on the tower next week. I will provide some additional posts over the next several days covering additional aspects of the preparation for next week.

– Fred (AB1OC)

Shack Construction – Part 4/4 (Final Setup Of Equipment)

Printer and Phone

Computers, Printer, Phone And Antenna Switching

The final step in the construction of our new shack was to outfit it with all of the infrastructure for power, RF switching and computers and install the radios and related support systems. This post will outline what we did in this area. One of the first things we did was to get the LAN in the shack working and set up our computers (two Windows 7 PCs) and a local printer. We also installed stands to suspend two computer monitors by each of our operating positions and keyboard trays to allow our keyboards and mice to be stored under the desk when they were not in use. The monitor stands were a good idea as they allowed us to place our displays just above our radios at eye level – perfect for the computer aided operating that we often do.

We also installed RF ground blocks by each operating position and terminated the ground connections from outside of our shack on the blocks. The ground blocks act as a convenient single point to connect the grounds for all of the devices in our station.

Ground Block

Ground Block

Desk space is usually at a premium in most shacks and ours is going to be no exception. To make the best use of the available space, we built dolly’s to place our 13.8V and 28V DC power supplies from Astron on the floor along with the main unit for our power amplifier (an Icom PW-1).  The amplifier has a small remote control and meter head which sits on our desktop and takes almost no space there.

Dolly's for Amplifier and Power Supplies

Dolly’s For The Amplifier And Power Supplies

The power supplies are terminated on RIGRunner power distribution panels by each of our operating positions as well as by the construction area. We have 13.8V and 28V DC power distribution blocks installed in these locations so that both voltages are readily available for distribution via Powerpole connections. Some of the 13.8V distribution panels have sensing capability so that when we turn on one accessory at each operating position the distribution panel powers up all of the 13.8V gear in that location – a nice convenience feature. We also added AC power distribution strips at several locations around our operating desk as well as APC UPS Power Supplies on both computers. With all of this infrastructure in place, we were ready to move our radios and related equipment into the new shack and set it up.

DC Power Distribution

DC Power Distribution

The next step in the equipment set up was to connect our antennas to the antenna switching consoles that were built as part of our shack. These devices were all grounded to the ground blocks for safety reasons. The switch panels allow us to assign any of our seven antennas to any of the four radios in the shack. This provides a great deal of flexibility when we are both operating at the same time. With the antenna cabling done, we set up both operating positions. Fred’s position is shown here. You can see the FilterMAX III switchable bandpass filtering systems on the right of Fred’s (AB1OC’s) position which provide needed isolation when both of us are operating on different bands at the same time.

This is Fred's operating position.

AB1OC Position

Here is Anita’s (AB1QB’s) operating position. Anita currently has a single radio installed but plans to add a second radio soon. She has her own set of bandpass filters on the right of her operating position. The combination of the filtering and antenna switching matrix allows us to operate our station in a multi-SO2R configuration during contests.

This is Anita's operating position.

AB1QB Position

We also set up all of our construction and test equipment in the shack. It is a great convenience to have all of this equipment set up and ready to use for kit building, making cables, and general test purposes whenever we need it.

Electronic equipment for equipment construction and test.

Construction Area

We took good advantage of the storage space in our shack for all of the odds and ends that are handy to have close at hand. This area also provides a nice spot to display some of our operating awards.

Storage and display area

Storage Area

Finally, we set up an A-V area with a TV, audio system and remote control and integrated this equipment into our whole-house A-V network. This allows us to listen to music or watch videos when we are not operating in the shack.

TV and Entertainment Audio Equipment

A-V Area

Here is a picture of our completed shack. We were able to get it into operation in time to use it for the 13 Colonies Special Event in July 2012. This allowed both of use to operate simultaneously as K2K, one of the New Hampshire 13 Colonies Special Event Stations.

Our Shack

We are both really enjoying our new shack and we find that we are operating much now that our equipment and the associated support system are properly set up. We are now working on a significant expansion of our Antenna Farm with the addition of a tower and several new antennas. We will continue to post as we progress on this next phase of our station construction project.

– Fred (AB1OC)