In a word, no.
Ferrites are interesting material. If you want to know how they work, read this: http://www.k0bg.com/beads.html
By the way, single turn chokes just don't suppress RFI to any level detectable. Like any good choke, they require multiple turns to be effective. At a minimum, make sure you have the common mode choked off the coax and control lines to your antenna. This keeps the lines from being part of the antenna, and picking up most of the RFI the on-board electronics generate.