[RFI] Resolving RFI to a DSL Modem

Adrian Flynn adrianjamesflynn at gmail.com
Sat Mar 21 12:06:18 EDT 2015

Why not use "Snap on Chokes"?
Put as many in series as needed.

Adrian KF7DYU
On Mar 21, 2015 11:32 AM, "Kim Elmore" <cw_de_n5op at sbcglobal.net> wrote:

> I have an  ADSL modem in my garage and when I operate with anything more
> than 1300-1400 W on 40 m only, it loses the ADSL connection. I';; be
> getting an IPDSL modem on Monday, though not Uverse (because... Well, it's
> the phone company). I'm assuming I'll have a similar problem with it, if
> not worse. I've ordered five of the ~1.5" ID type 31 ferrite cores, enough
> for one per wire that enters or exits the device. How many turns should I
> pack on: as many as I can in a single layer? ANy guess if I can get away
> with enough turns when I run two wires per core?
> There's a twisted pair that enters the modem, a power line, and four CAT-5
> cables. DO I need to observe any special precautions?
> Kim N5OP
> --
> Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP
> SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)
> /"In theory there is no difference between theory and practice. But, in
> practice, there is." //- Attributed to many people; it's so true that it
> doesn't matter who said it./
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