Shortly after Field Day ended, Bill WC3B posted a map of the contacts he made on Twitter. “How cool,” I thought, and asked him how he’d done it. As it turns out, the map was a function of the N3FJP Field Day logging program.

While reading about how to configure my solar system for Field Day, I came across a recommendation to use an RF filter on the input of the solar charge controller. As you can see from the photo at right, it’s just an RF choke formed by winding the input cable through the core a couple of times. I have a bunch of cores, so I figured that instead of spending $5 on this core, I’d just use one I already have.

Being a member of the IEEE, I get a number of different emails from them. A week ago, I got an email from the IEEE Communications Society advertising a new white paper from Rohde&Schwartz titled, The Rebirth of HF.