I've seen this happen too.  It's funny, if we plug the computer right into 
the radio it goes away.  Use a router and it's back.

We're just going to replace the cat 5 with shielded cable and see what 
happens.
marlon

----- Original Message ----- 
From: <e...@wisp-router.com>
To: "WISPA General List" <wireless@wispa.org>
Sent: Sunday, March 29, 2009 9:24 PM
Subject: Re: [WISPA] harmful RFI from ethernet to HAM RADIO?


> Yes that would be ethernet. Gets some cable ferrules and put on the 
> ethernet right next to the radio another right at the exit from the poe 
> and another right as cat5 cable goes into poe and finally one right where 
> the cat5 cable goes into switch and computer.
>
> Might also consider using heavy outdoor rated shielded cat5 cabling 
> between poe and unit.
>
> /Eje
> Sent via BlackBerry from T-Mobile
>
> -----Original Message-----
> From: "Kurt Fankhauser" <k...@wavelinc.com>
>
> Date: Sun, 29 Mar 2009 23:56:12
> To: 'WISPA General List'<wireless@wispa.org>
> Subject: [WISPA] harmful RFI from ethernet to HAM RADIO?
>
>
> Has anyone else here ever been co-located on a tower with a HAM radio
> (144-148mhz) VHF repeater or perhaps even a commercial system in the 
> 150mhz
> band and gotten complaints that your Ethernet cable is causing them
> interference on their repeater? We are trying to locate the source of 
> noise
> on an amateur radio repeater system locally and last time I went up on 
> grain
> leg there was a whole lot of Ethernet cabling strung everywhere and I've
> read some links such as these. http://www.hamuniverse.com/linksys.html 
> that
> apparently some brands of equipment give out much more spurious emissions
> than others.
>
>
>
> Also how did you work with the radio people to solve it? Seems to only be
> apparent in the VHF band.
>
>
>
>
>
>
>
> Kurt Fankhauser
> WAVELINC
> P.O. Box 126
> Bucyrus, OH 44820
> 419-562-6405
> www.wavelinc.com
>
>
>
>
>
>
>
>
>
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