[RFI] Common mode chokes

[Larry Benko]

Chuck,

Material "J" also known as material "75" generally has a permeability of 
5000 while "31" material has a permeability of 1500.  I would leave well 
enough alone.

Larry, W0QE

Chuck Hutton wrote:
> Hi - 
>
>  
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> I've been using up some FT240-J cores to wind common mode chokes for Beverage antenna feedlines. I use these antennas only for LW, MW and 160 m listening. In looking at the Fair-Rite data for #31 cores, it looks like there is not much difference between the two for MW and 160 m usage. 
>
>  
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> #31 seems to be the favorite these days, but given that my chokes are already wound isthere much point to udoing them and using #31????
>
>  
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>  
>
> Chuck
>  		 	   		  
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