[Elecraft] Spurs on 15m from new laptop

Barry w2up at comcast.net
Thu May 17 17:04:39 EDT 2012


I have a bunch of the split ferrites with a hole to fit RG-213 coax on hand. 
Got 2 turns through the hole and used 3 of them with complete elimination of
the noise.

Barry W2UP

.
Jim Brown-10 wrote
> 
> 
> Don't wrap the cable with ferrites, WIND turns of the cable through a 
> ferrite core.  #31 or #43 material work fine, at least five turns 
> through a 2.4-in o.d. toroid, at least three turns through a clamp-on 
> that's at least 1 inch long.
> 
> More advice in tutorial form -- http://audiosystemsgroup.com/RFI-Ham.pdf
> 
> 73, Jim K9YC
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