Isolatore di linea antenna RF 1-30 MHz / nominale @3 kW / arresta soffocamento RFI / RF CMC-130-3K
If you use End Fed antenna aka 9:1 UNUN with a piece of wire, OCF dipole antenna or have any RFI problem, use the best tool to cure it. Ferrite turns the RF energy into heat, coiled coax does not! It is rated up to 3kW in HF band.