On 1/19/2011 8:21 AM, Jim Sheldon wrote:
> I've had several queries on this so I'm posting here - I have no idea what 
> ferrite material is

It makes no sense to buy unknown ferrite cores, especially for use on 
the HF bands. Study my tutorial on RFI to understand why.

http://audiosystemsgroup.com/RFI-Ham.pdf

73, Jim Brown K9YC
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