Dear Henny, my QTH is about 400 m from a railway line, and I regularly saw their 16.667 Hz power frequency and several ELF harmonics. The E-fields are relatively strong as the lines normally do not c
Dear Henny, my QTH is about 400 m from a railway line, and I regularly saw their 16.667 Hz power frequency and several ELF harmonics. The E-fields are relatively strong as the lines normally do not c