Hum interference filter, isolator, with galvanic and capacitive isolation of the inner and outer conductors. The shielded current filter provides capacitive and galvanic isolation for coaxial cables and effectively prevents interference and hum caused by ground loops. It is suitable for use with cable TV and DVB-T as well as radio antenna systems, but not for satellite receivers. The frequency range extends from 5 to 1006 MHz with an insertion loss of 2 dB. The connections include an IEC socket and an IEC plug.