[Elecraft] LCD TV Causing RFI

[Jim Brown]

On 2/8/2011 12:20 PM, Guy Olinger K2AV wrote:
> That is to say that a pair of three turn suppressors is worth 18, and 
> a single five turn is 25, all else held equal. 

Another important point. With any ferrite used for suppression, 
RESONANCE is the SWEET spot, and any ferrite that's GOOD for suppression 
will yield a VERY low circuit Q. Values on the order of 0.5 are typical 
for Fair-Rite  #31 and #43. That means the resonance will be VERY broad 
(typically covering a frequency ratio of 3:1 or 4:1 for decent 
suppression, and up to 8:1 for #31 below 5 MHz).

73, Jim Brown K9YC