Thursday, March 5, 2015

A 50 MHz trap

These days I have been thinking in a new antenna experiment. If works as expected, I could install it on my roof and add one or two new bands in my shack. But for the experiment I need a trap tuned to 50 MHz.

I do not have any experience working with traps in HF frequencies, but it was obvious the main problem will be the capacitor. A trap is a parallel connected LC at the top of an antenna radiating some power, so it was obvious the capacitor would need to withstand very high voltages. How high? I don't know. Maybe 5 kV or maybe 20 kV. A very high value in any case.