Can a hum eliminator be used with PAL and 50 cycle systems?
Yes. 1) PAL and NTSC video need approximately a dc to 6 MHz bandwidth to operate. A hum eliminator has a bandwidth of dc to over 100 MHz, making if suitable for PAL and NTSC as well as HDTV and projection TV signals. 2) The impedance of the choke in the ground path is made large enough to block hum from both 50 and 60 cycle sources.