What are these very old posts?

Recently I imported posts from my old Ham Radio/Tech blog: ki4gmx.wordpress.com. They are ancient, but they are important to me to keep. I am slowly going through some of the posts and updating links. If you see two links in a row with one of them struckthrough, the that one is the old link. The new one, which probably points to the original on archive.org, is next to it.