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Re: [TowerTalk] ferrite beads was...Re: [RFI] HIGH POWER and RFI...

To: towertalk@contesting.com
Subject: Re: [TowerTalk] ferrite beads was...Re: [RFI] HIGH POWER and RFI...
From: "Marlon K. Schafer" <ooe@odessaoffice.com>
Date: Sat, 10 Mar 2007 08:27:59 -0800
List-post: <mailto:towertalk@contesting.com>
Thanks Jim,

Where do I find those freqs?  I've looked on google but haven't found any 
good data that I can understand.

thanks
marlon

----- Original Message ----- 
From: "Jim Brown" <jim@audiosystemsgroup.com>
To: <TOWERTALK@contesting.com>
Sent: Saturday, March 10, 2007 6:57 AM
Subject: Re: [TowerTalk] ferrite beads was...Re: [RFI] HIGH POWER and RFI...


> On Fri, 09 Mar 2007 10:41:03 -0600, Chuck Sudds wrote:
>
>>I have thought about encasing the Wi-Fi receiver in a metal box or
>>shielding it in some manner and using torrids on the CAT5 cable?
>
> I would start by listening for Ethernet birdies on the frequencies
> listed in my tutorial that are on the ham bands that bother the
> ethernet system, and adding ferrite chokes as described in the
> tutorial to suppress those birdies. Because antennas exhibit
> reciprocity (that is, they work the same for RX and TX), what you do
> to suppress those birdies will also suppress the Ethernet system
> receiving your transmitter.
>
> If you still have problems, THEN work on shielding the electronics,
> which is usually far more difficult to do effectively than adding
> the chokes.
>
> 73,
>
> Jim Brown K9YC
>
>
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