21 Tech Net: 2025-01-05

My Week in Radio

  • My favorite way to learn things: experiments
    • diagnose and repair a bad coax cable
      • no continuity on center conductor
      • plugged it into the nano vna, switched to smith chart
        • saw a big spiral around the outside
        • no change in the graph on the other side
        • compared to a working cable
        • it should have spiraled
        • maybe alonger spiral for a longer cable
    • 71 foot random wire with 5W is not needing the tuner
      • disconnected lots of different places and checked lots of SWR without those connections
  • Tossed a wire into a tree at Swatara State Park today for some POTA contacts
  • Operated the last 2 hours of the RTTY contest on 10m, 15m, and 20m.
ka3tkw  net  tech  21 

See also