Dear Stefan, the wire length of 25 cm of your active antenna corresponds very well to an antenna capacitance of about 2.7pF. The same capacity I have found as an optimum and used in the form of a "pc
Hello Rik, I use an active antenna of my own design (higher imd free range than the miniwhip).It alsoo has a FET inputstage with some protectiondiodes and a small lightbulb. It was only 3 meters away