[RFI] Finally located my RFI

[K9MA]

On 6/21/2024 3:56 PM, Dave (NK7Z) wrote:
> No problem on winding turns, and thanks!!!  I will tune the ferrite to 
> 24 MHz., and see how that works...  I am setting up a test jig to hold 
> a ferrite out in the closest I can get to free space, being fed as it 
> would be in the real world.  I will adjust the resonant frequency to 
> be 24 MHz., that should give me the best shot at using this to kill 
> this mess...  THANKS again! 

I'd be surprised if you could get enough turns on it to resonate, unless 
it's a really big core. If it does resonate, the Q should be very low, 
as that material is supposed to be lossy. (A pure reactance might just 
reflect the current to radiate from somewhere else, rather than turn it 
into heat.) There may be published curves for the core showing impedance 
vs frequency for various number of turns.  In any case, you want the 
maximum impedance you can get at that frequency, and it should be mostly 
resistive.

73,

Scott K9MA

-- 
Scott  K9MA

k9ma at sdellington.us