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Re: [TowerTalk] RF Quiet Router

To: "Tower Talk List" <>
Subject: Re: [TowerTalk] RF Quiet Router
From: "Jim Brown" <>
Date: Sat, 02 Sep 2006 14:52:34 -0700
List-post: <>
On Sat, 02 Sep 2006 11:48:13 -0500, Mike Niswonger wrote:

>Try switching out the wall wart power supply. 

Yes. I include these power supplies in the list of potentially 
bad boxes. Also, try using ferrite chokes to suppress radiation 
from the power supply leads. The trash on the power leads can 
originate either on the Ethernet box or the power supply (or 

Another solution is to have one suitably-sized linear supply 
trickle-charging a battery that runs the gear. I'm gradually 
adopting this strategy as an alternative means of UPS for my 
computer networking infrastructure. In addition to the obvious 
noise reduction possibilities, conventional UPS units are power 
hogs. I've become quite conscious of this after moving from 
Chicago where I paid $0.10/kWh, to California, where I'm paying a 
graduated rate that hits $0.35/kWh. 

Jim Brown K9YC


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