I was testing a new Wilson Silver Load antenna connected to 16' of Belden coax with an MFJ 259 Antenna Analyzer when I noticed something strange. The impedance would start out at 50 ohms, and slowly, over five minutes or so, creep up to 60 ohms. I disconnected the meter, let everything sit for a while, and then took another measurement, but it happened again. I repeated this twice more with the same result.
What causes this? Is it the MFJ Analyzer not measuring the impedance accurately, or is there something else involved?
What causes this? Is it the MFJ Analyzer not measuring the impedance accurately, or is there something else involved?