Tom,

These things come in various sizes, and generally you would use the 
proper size to fit the wire snugly.  You would lay the wire in the 
groove, kind of like laying a hot dog in a bun and snap it closed.

If the  groove is large enough for multiple passes of the  wire, you can 
  wrap the wire around one half of the choke multiple times: long ways, 
end to end through the groove.   You will still need to snap it shut 
without pinching the wire.


What I got here for a buck each  4 or 5 years ago are now $2 each, but 
one source for different sizes is:
http://www.allelectronics.com/make-a-store/category/235/Ferrites/1.html

73, Steve KW3A


On 11/22/2012 8:27 AM, Tom Behler wrote:
>      Hi, all.
>
> I need a little Elmering on something.
>
> I am dealing with some minor RFI issues here in the home shack, and have a
> few RF chokes that I'd like to try to see if they will take care of the
> problem.
>
> The chokes are the snap-on variety, and are about  an inch and a half long
> and about 3 quarters of an inch wide.
>
> When you open the choke, there are round indentations on each side where
> wires are supposed to go, and there is a hinge in the middle to allow
> opening and closing.
>
> My question is this:  How do you wind the wires in the choke for best
> results?  Do you wind the wires themselves into a coil, and then snap the
> choke around the coil, or do you wind the wires around each side of the
> choke?
>
> I know that, to some, this may seem extremely elementary, so thanks for your
> indulgence with this thread.
>
> Happy Thanksgiving to all!
>
> Tom Behler: KB8TYJ
>
>
>