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.
Joel R. Hallas, W1ZR
From: email@example.com [mailto:firstname.lastname@example.org] On
Behalf Of Dave Holford
Sent: Wednesday, January 09, 2008 3:41 PM
To: ICOM Reflector
Cc: email@example.com; firstname.lastname@example.org; email@example.com;
Subject: Re: [ICOM] Wired vs Wireless Routers for RFI
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.
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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