OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,
RFI/EMI Solutions from KHz to GHz
Ferrite Snap On, ID = .74 in/18.8 mm, Mix 75
Excellent for AC/DC power cables on switching power supplies and data/audio/video cables for AM broadcast, Solar RFI suppression.
Case size is 58 ferrites