Our next generation portable satellite station is complete and we tested it during our recent Tech License Class. We discovered a minor issue which was easily sorted out. The new antenna system includes switchable circular polarity and has performed really performs well during the first 50 or so contacts made using the 3.0 station. You can read more about the new station and the initial tests via the link above.
Our Portable Satellite Station 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…
Our Portable Satellite Station 3.0 is coming together and has been tested thanks to help from several NARS members. Part of the project is to improve the sequencing system which manages antenna mounted preamplifiers. These improvements involved the design and construction of a simple Push To Talk (PTT) router. The article above explains the design, construction, and integration of this PTT Routing devices. It was a great homebrew addition to our Portable Satellite Station setup.
We installed a 75m loop for SSB operation on our tower when we built it. The loop is full size and is diamond shaped so that our lower SteppIR DB36 yagi can rotate inside of it. The loop is fed at the bottom corner about 20 ft up from the ground. It works great for SSB operation on 75m but we have often wished we could use it across the entire 80m band. This goal led to a project to create a matching system for the antenna. The idea was to use a set of loading coils in series at the feed point create a good match in all segments of the 80m band…
We shared this project at our project night meeting in January. I recently published an article explaining the design and construction of an 80m Broadband Matching System. The ideas used can be applied to many other matching system arrangements for many different types of low-band antennas.
Every January Meeting we hold Project Night, where members bring in and share recent homebrew projects that they have built. This year’s Project Night was full of interesting projects built by our members.
Our Programs Chairperson, Scott, NE1RD led it off by showing us some kits he had built, including the K1EL PaddleStick Keyer that we will be building for the February Tech Night.
Bob, KB1TEK brought some QRP kits that he had built.
Dave, K1DHP showed us the VLF Detector that he built.
Hamilton, K1HMS brought Antenna Switches that he had built.
Dave, K1DLM showed us a Heathkit that he plans to build.
Dennis, K1LGQ had another explosive presentation when he showed us a KX2 stand that he built.
Fred, AB1OC brought an 80m band matching system that he will install in order to make our 80m delta loop be resonant across the band. He has programmed our MicroHam system to automatically have the box switch the matching system as we tune through the 80m band. I’m looking forward to using this to get the last 20 80m contacts for my 5 Band DXCC!
I (AB1QB) demonstrated a Raspberry Pi project that I built over the holidays. It is called a Morse Code Virtual Radio. When you hook up a monitor and a straight key to the Raspberry Pi, it will decode what you key in. This was a big hit with the kids who visited us for ARRL Kids Day.
Finally, Mike, AB1YK brought in a number of projects that he has done including a Panadapter and a CW Generator.
Overall it was great to see all of the projects that our members have been working on. The gallery above contains more pictures from Project Night.