[Elecraft] OT: Big Ferrite Split Beads @ B.G. Micro

[ab2tc]

For the record, Mouser has a similar snap-on ferrite in the preferred (for
HF) #31 material here:

http://www.mouser.com/ProductDetail/Fair-Rite/0431167281/?qs=KmHvPbTOE4S79xB57hcPyQ%3d%3d

The part number is 623-0431167281. The hole is about 0.4". A smaller version
is this part# 623-0431164281

These are not terrible expensive either and can be bought in any small
quantities. I used 4 of them to bring down the noise on the Ethernet cable
from my Dell computer. Dell seems to be particularly bad for common mode
noise from the Ethernet port. The router and my GB switch also in the shack
are fine.

AB2TC - Knut


Jim Sheldon-2 wrote:
> 
> They didn't list the material type in the ad, so no, I don't.  I suspect
> they are surplus from a computer power supply manufacturer as they are
> about the same size as those used around the output leads of many of the
> switching supplies used in computers.
> 
> I've had several queries on this so I'm posting here - I have no idea what
> ferrite material is used in these cores and by the time the ones I ordered
> get here and I test them with my antenna analyzer and a 5 turn loop,
> they'll probably be sold out.  
> 
> Jim - W0EB
> 
> <snip>
> 

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