[EIDXA] ferrite materials and chokes

[Joe Hetrick]

I think it's more that ethernet signaling has harmonics (for certain they fall on 20M.)

I recently disassembled a modem that had a crystal in the middle of 160M in it.

My understanding is that catV TP should be fairly quiet when terminated properly; it certainly should cut down on crosstalk in large binder groups over cat3 or other terminations, but I defer to the EE's :).  My only experience there is practical with thousands of circuits terminating into large groups.

VKN

On May 22, 2013, at 7:56 AM, Marty Santic <marty.santic at gmail.com> wrote:

> At one of the forums, it was mentioned that CAT 5 home network wiring is a
> likely source of RFI and can be solved via the addition of a ferrite core
> at the modem end and another at the other end (computer/other).
> 
> 
> On Wed, May 22, 2013 at 7:20 AM, Tom <wb8zrl at southslope.net> wrote:
> 
>> a comment on the topband reflector.  Link is a 66 page tutorial,  very good
>> 
>>          tom
>> 
>> 
>> Out of all the info I have ever read on ferrite materials and common-mode
>> chokes --either in print or on the Web-- Jim's (K9YC) info at
>> http://audiosystemsgroup.com/RFI-Ham.pdf has been the most valuable to me.
>> 
>> http://audiosystemsgroup.com/RFI-Ham.pdf
>> 
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> 
> 
> 
> -- 
> Marty Santic ----- W9EAA - EAA Chapter 75 Newsletter Editor - RV-12 N128MS
> (Flying)
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