The Carolina Windom uses a coax feedline from a 4:1 balun at the feedpoint
to a 1:1 current-type unun at the 22-foot point.

Do you guys think that some number of snap-on ferrite chokes of the type
Radio Shack sells at

http://www.radioshack.com/product/in...entPage=search

(Radio Shack part number 273-105), wrapped around the RG-8X feedline at
the 22-foot point, will be suitable in place of something like the MFJ-915
"RF Line Isolator" (unun)?

If so, how many should I use? I have four of them now and the local Radio
Shack claims to have some more in stock.

Each of those ferrite cores is about 1.25" long by 1" square. I have no
idea what type or grade of ferrite material they're made out of.

Thanks...