[RFI] RFI U-verse

K8RI k8ri at rogerhalstead.com
Sun Feb 27 14:17:56 PST 2011


On 2/27/2011 12:47 PM, Jim Brown wrote:
> Absolutely untrue!  A common mode formed by winding multiple turns of
> the signal pair (or coax) around a ferrite core has ZERO effect on the
> differential signal, but can greatly reduce common mode current, which
> is a very common (and powerful) coupling mechanism for RFI.

I didn't think a choke should bother CAT5 or 6.  Parallel wires yes, but 
not groups of twisted pair.

73

Roger (K8RI)
> Study http://audiosystemsgroup.com/RFI-Ham.pdf
>
> 73, Jim Brown K9YC.
>
> On 2/27/2011 8:19 AM, J.Gordon Beattie, Jr., W2TTT wrote:
>> Jim,
>> Putting a choke on the network feed reduces bandwidth to the service and
>> creates instability.  There are other measures that can be applied to
>> eliminate the RF getting into the RG.  I can point you through the
>> appropriate channels to get this done if you have a problem with RFI to your
>> U-Verse service.
>>
>> Thanks&   73,
>> Gordon Beattie, W2TTT
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