GENERIC HOUSEHOLD RADIO FREQUENCY INTERFERENCE (RFI) KIT
The RFI kit is designed to cure most household RFI problems. It contains ferrite toroids and beads selected to eliminate RFI from .1 to 300 MHz.The beads are easy to use, don’t require modification of the protected equipment and work in almost all cases, even when plug-in filters fail.
What is in the kit? Three 1/2" ID snap on beads, three 1/4" snap on beads, 3 wall wart filter rings to suppress noise and interference and a large 1.4" ID ring for AC power cord installation on RFI prone equipment like computers, Home Theater Systems, telephones, etc.
Plus full instructions in the RFI TipSheet. A $49.50 retail value if purchased separately.
50 ohm coax to 75 ohm balanced output baluns are useful for low (< 1 wavelength) dipoles exhibiting 75 ohm characteristic impedance or for matching to balanced ladder line whose endpoint impedance is near 75 ohms.
50 ohm coax to 75 ohm CATV coax connections are easily done with a 1.5:1 unun with SO-239 connectors on input and output. Likewise 50 ohm coax to unbalanced verticals or loads near 75 ohms can be matched with a 1.5:1 unun.