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Re: [Yaesu] [ICOM] Wired vs Wireless Routers for RFI

To: 'ICOM Reflector' <icom@mailman.qth.net>
Subject: Re: [Yaesu] [ICOM] Wired vs Wireless Routers for RFI
From: "Joel R. Hallas" <jrhallas@optonline.net>
Date: Fri, 11 Jan 2008 11:07:08 -0500
List-post: <mailto:yaesu@contesting.com>

This is interesting, but for some reason, I don't seem to have the problem
here. I have my voice and data blocks on the wall adjacent to my basement
shack. I come in with a Sci-Atlanta cable modem, Lynksys WRT54G
wired/wireless router followed by an 8-port 3-com dumb 10/100 Mbps hub. I
have 9 ethernet drops, all with CAT3 unshielded cable, including multiple
runs that go within a foot of my main HF antenna windowline for some
distance, including one to the station computer. 

I don't hear a peep on 20 meters, and haven't noticed anything on other
bands. OTOH, while I'm running 500 W into the windwline, I knock the
Ethernet out for the radio computer, but it comes right back when I go to

I do have separate power systems. The comm. Gear is run through an APC ups
system, while the station is run from a gel cell with a charger.


Regards, Joel
Joel R. Hallas, W1ZR

-----Original Message-----
From: icom-bounces@mailman.qth.net [mailto:icom-bounces@mailman.qth.net] On
Behalf Of Dave Holford
Sent: Wednesday, January 09, 2008 3:41 PM
To: ICOM Reflector
Cc: yaesu@contesting.com; ft100@yahoogroups.com; rfi@contesting.com;
Subject: Re: [ICOM] Wired vs Wireless Routers for RFI

Hi John,

I installed a D-Link DI-604 wired router a while back, using Cat-5 cables.
The router is within 8 feet of multiple receivers, and router and cables 
are about 20 feet from the feedpoint of an inverted L.
I have not noticed any increase in noise or birdies over the stuff that 
was there before - neighbors TV and stuff!

Also there is no evidence of RF to the network on any frequency from 
160m to 70cm running 100 Watts on HF and 30-50 Watts on VHF/UHF.

Dave, VE3HLU

John Geiger wrote:

>I have tried 3 different wireless routers(Linksys,
>Netgear, and Ativa) and all 3 have put birdies on the
>20 meter band (maybe other places, but it is so bad on
>20m I gave up and didn't check other bands).  I was
>using them in a wired fashion, and all 3 put birdies
>on the same frequencies, which makes me think that it
>is something related to the workings of the router. 
>The ethernet wires I have run around the house are
>radiating the birdies, as they disappear when I
>disconnect the wires.  However, I cannot afford to go
>wireless right now with buying all of the wireless
>Are wired routers using exactly the same circuitry
>(meaning they cause the same birdies) or have people
>found wired routers to be quieter RF wise.  I will
>probably break down and try one anyways, but thought I
>would try to get some feedback first.
>I am back to using my ethernet hub which is quiet with
>the ethernet wires running around the house, but the
>ISP will only give me 2 IP addresses, so the computer
>sitting next to the radio hasn't been connected to the
>internet for a couple of weeks.
>73s John AA5JG

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