Category Archives: Antennas

Articles about Antennas, Feedlines, Towers and related equipment. Fixed, Portable and Mobile Antenna Articles are included.

One Radio, Two Shacks

One Radio, Two Shacks

My wife and I have two houses, one in MA and the other in NH.  I can afford to have an antenna set up at each location but duplicating the radio and amplifier is more expensive.  The point of the article is to describe how I transport the interior of my shack from one QTH to another.  As a new ham, I focused on building a shack in my primary QTH in MA.  Additionally, I wanted to be able to operate from our second home in NH. My solution was to put some effort into putting up a good antenna there and I would just bring my “rig” up to NH when we went there.  I could have set up remote access from the NH QTH to my MA QTH, but there was something about the property that made me want to have an antenna up there.

Advantages of operating from two locations

The MA QTH is in Tewksbury, MA, and has all the RF noise present in a suburban environment.  Additionally, the terrain was flat, so my antenna height above my roof was all I had.  The NH QTH offered many advantages. The first was there were many tall trees over 80 feet high.  Another advantage was the house was on top of an 85-foot hill.   The RF environment in the rural forest setting was noticeably quieter.  Installing an antenna high up in one of the trees on top of the hill is powerful. I ended up installing an 8010 EFHW antenna from MyAntennas.com which you can view here.  This second article discusses the topography of the NH QTH and how well the antenna worked in the 2019 CQ World-Wide DX SSB Contest. A disadvantage to operating remotely was that power and internet at the NH QTH were not reliable and I could anticipate losing connectivity multiple times a year.  I think this is a good case for wanting to operate locally from both locations.  A few hundred dollars for the antenna installation was an amount I could handle that would not eat into the Ham budget for the primary station in MA.  Duplicating the major components of that station would cost around $4500 which may happen someday, but until then, I will transport them between shacks.

One Radio, Two Shacks – Moving the Components Between Shacks

Here is what my MA shack looks like

MA Shack - One Radio, Two Shacks
MA Shack

Icom 7300, Elecraft KPA500 amp, and KAT500 Tuner are the core components that need to travel between shacks.

When I arrive at the NH QTH this is what the shack there looks like.

Empty Desk
Empty Desk

In addition to the radio gear, I bring my laptop.

Laptop with 2 Additional Monitors
Laptop with 2 Additional Monitors

I packed all the gear required to set up the NH Shack in these two toolboxes.  Pelican cases would be great, but these were around $60.00 at Home Depot.  They are watertight and the bottom one has wheels.

Stacked Tool Boxes
Stacked Tool Boxes

Let’s unpack the smaller one on the top first.

Small Tool Box Full
Small Tool Box Full

Inside is the IC-7300, Heil Pro 7, and Bencher CW Key.

The big toolbox is full and quite heavy.

Big Tool Box Full
Big Tool Box Full

The box from the Pro7 headset holds the loose cables and fits in the toolbox perfectly.

Big Toolbox Middle Layer - One Radio, Two Shacks
Big Toolbox Middle Layer

The KAT500 Tuner is unwrapped.  You can see below how well the toolboxes fit the components.

Big Tool Box Bottom
Big Tool Box Bottom

Dummy Load and KPA500 amp on the bottom of the large toolbox.

Components Laid Out - One Radio, Two Shacks
Components Laid Out

Here are all the components laid out.  Key cords and cables are labeled.

Wires and Ground

I connected the components.  The copper pipe is a bus for common ground.  The wire on the right side connects to the house ground outside.  The radio is noticeably quiet.

NH Shack Ready
NH Shack Ready

The shack is ready.

One Radio, Two Shacks – Here’s How Set Up Goes…

Click on the above image for a hyper-lapse video of me putting the shack together.

Jon, AC1EV

Satellite Station Antenna Upgrades

We’ve been making good use of our Satellite Ground Station. Our existing 2MCP14 and 436CP30 antennas have enabled us to make over 2,000 satellite contacts; working 49 of the 50 U.S. States, 290+ Grid Squares, and 31 DXCCs. Our station is also an ARISS Ground Station which enables us to help Schools around the world talk to astronauts on the ISS.

As you can tell, we are pretty active on Satellites so we decided to take our station up a level by upgrading our antennas. We choose larger yagis with booms over 18+ ft in length. The upgrade required us to improve the mechanical aspects of our Satellite Antenna System as well…

Source: Satellite Station 4.0 Part 12 – Antenna Upgrades

We’ve been pretty busy with antenna projects at AB1OC-AB1QB this fall. In addition to building a new EME Antenna System and Station, we’ve also been working on upgrading our Satellite Antennas.

Satellite Antenna Upgrade

The Satellite Antenna project was a pretty challenging one. We opted for the largest available circularly satellite antennas available from M2 Antenna Systems.

Satellite Antennas On the Tower - Parked
Satellite Antennas On the Tower – Parked

Getting these antennas to be mechanically reliable, properly aligned, and operating smoothly required us to make some custom modifications to the hardware associated with our Satellite Ground Station.

Cross Boom Counterweight and Trusses
Cross Boom Counterweight and Trusses

The article above covers the construction and adjustment of the new antennas. It also covers several custom enhancements that we made to our satellite antenna support system.

Aircraft Tracking Antenna System Addition

Satellite Tower Infrastructure including ADS-B Antenna
Satellite Tower Infrastructure including ADS-B Antenna

We also added an outdoor antenna for our FlightAware ADS-B Tracker as part of the project. ADS-B is a relatively recent aircraft tracking system. Our new ADS-B antenna has increased our Tracker’s contribution to the ADS-B network considerably.

If you’ve ever wondered what goes into building and putting up a high-performance satellite ground station, take a look at the article. The ideas shared there are applicable to the construction of any VHF and above antenna system – especially those that utilize elevation rotators and thus require balancing.

Fred, AB1OC

EME Station 2.0 Part 13 – H-Frame Enhancements

Our new 2m EME Antenna System has been performing very well. One area that we noticed that could use improvement was the alignment of our antennas as we move them in the Elevation plane. We’ve added some custom enhancements to our EME H-Frame to address this problem…

Source: EME Station 2.0 Part 13 – H-Frame Enhancements

EME H-Frame – The Problem

Any antenna system that involves large, multiple yagi antennas is bound to need some tweaking to work at its peak potential and to be mechanically reliable. Our recently constructed EME antenna system is no exception. We added some elements to properly balance our EME H-Frame assembly when we put it up.

We found that the antenna tended to change their alignment when we rotated them in the elevation plane. A solution to reduce some of the stress on the fiberglass components in our H-frame was also needed.

The Solution

Custom EME H-Frame Truss Enhancements
Custom H-Frame Truss Enhancements

The solution to these problems was a Custom Truss System that we worked with Matt at XX-Towers and Robert at M2 Antenna Systems to create. We built the new Trusses using non-conductive Phillystran cable and Turnbuckles. The parts were carefully arranged to keep all of the metal components that were added at the center of our antenna array to prevent any impact on the system’s antenna patterns.

We had a 50-foot Boom lift at our QTH recently to enable some upgrades to our Satellite Antennas. We made good use of it to install our EME H-Frame enhancements as well.

This part of our EME Project is a good example solution for some of the typical mechanical problems one encounters when building a large antenna system.

You can see and read more about what we did via the link above.

Fred, AB1OC

Radio Amateurs Developing Skills Worldwide