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Re: [RFI] Home networking birdies

To: "D. Kemp" <nn8b@yahoo.com>, rfi@contesting.com
Subject: Re: [RFI] Home networking birdies
From: "Leigh L Klotz, Jr." <Leigh@WA5ZNU.org>
Date: Tue, 19 Sep 2006 11:57:12 -0700
List-post: <mailto:rfi@contesting.com>
Try changing your computer ethernet card setting to 10mbit from 
100mbit.  If the netgear hub is really a hub, it will force all devices 
to use 10mbit and the 14.030 noise should go away.  If it is a switch, 
then you will need to do the same to all devices.  Or get a hub...  You 
can move your 100mbit stuf far away and use 10mbit connections to there, 
with ferrites, or better yet optical fiber, which is pretty cheap on 
eBay.  You can get 10 and 100 mbit equipment (pci cards, converters, 
fiber) etc for thr $5-$35 range.  Try old style connectors such as ST 
for the best prices.
On Tue, 19 Sep 2006 10:47 am, D. Kemp wrote:
> Thanks guys for all the good suggestions.
> My RFI is on 14.030 and some smaller ones up and down
> from there. It seems to be getting on through the
> antenna; if I disconnect the coax from my rig it goes
> away.
> I have done the following:
> 1. Put some toroids of my cat5 cable on both ends.
> These are the rectangular split type. No help, same
> level of interference.
> 2. The cable from the D-link router seems to be the
> RFI generator. If I unplug it from the hub there is a
> great decrease in the level of the RFI signal.
> 3. If I unplug the power from the Netgear hub and then
> run the feed cat5 from the d-link directly  into the
> computer there is a good reduction in the level of RFI
> from an s5 signal to an S1 signal.
> 4. I covered the Netgear hub with foil as per one
> suggestion without any difference in RFI signal
> levels.
> 5. I wrapped the dc power cable of the D-link router
> onto a toroid. No help.
> 6. Wrapped the power cable of the Netgear hub onto a
> toroid. No help.
> 7. Wrapped the D-link router with foil. No help.
> I am thinking of 2 direct runs from the router using
> shielded cat5.
> What about shielded cat5? Anyone have experience with
> using it?
> The large toroids may help, but they are expensive, I
> don't have any, and it might be better spent on cable
> if shielding would work.
> Any more suggestions?
> Thanks again for all the help.
> Regards,
> Don, NN8B
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