Re: [IRCA] More on noise suppression

[neilkaz <neilkaz@xxxxxxxxxxxxx>]

Please forgive my ignorance here as I remain quite confused. How does one wind rather thick coax or CAT5 around small toroid rings. A picture or link will be worth a thousand words here.

http://www.dxing.info/equipment/coax_leadin_bryant.pdf is an article where Dr. Bryant (RIP old friend) was able to make a choke winding tiny coax many turns, but I can't see how this is possible with something link RG58 unless I don't understand how to make a choke.

Following Dr. Bryant's guidelines, I unhooked my BOG from the xfmr and was getting S5 to S6 on the super strong close Chicago superpowers and a few semi-locals also were still audible, some barely moving the S-meter. So I have some work to do.

73 KAZ


-----Original Message-----
>From: Mark Durenberger <Mark4@xxxxxxxxxxxxxxx>
>Sent: Jul 30, 2011 3:43 PM
>To: Mailing list for the International Radio Club of America <irca@xxxxxxxxxxxxxxxx>
>Subject: [IRCA] More on noise suppression
>
>Here's a paper that Fair-Rite publishes on core materials.  It's pretty much 
>agreed that their Material # 31 is overall best for MW/SW noise suppression. 
>The recommended toroid rings are Fair-Rite # 2631803802.  An effective noise 
>choke can be realized with 9 to 14 turns of the lead-in (coax or Cat 5) 
>wound around 5 of these toroid rings.
>
>http://www.fair-rite.com/newfair/pdf/CUP%20Paper.pdf
>
>
>Regards,
>
>Mark Durenberger
> 
>
>
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