Re: [IRCA] More on noise suppression

["Mark Durenberger" <Mark4@xxxxxxxxxxxxxxx>]

Photo sent off-line.  It's really easy to do if you have the right size 
rings (as id'ed below) and your connectors aren't too big.

Regards,

Mark Durenberger

--------------------------------------------------
From: "neilkaz" <neilkaz@xxxxxxxxxxxxx>
Sent: Sunday, July 31, 2011 10:07 PM
To: "Mailing list for the International Radio Club of America" 
<irca@xxxxxxxxxxxxxxxx>
Subject: Re: [IRCA] More on noise suppression

> 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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