[Yaesu] Wired vs: Wireless Routers for RFI

[K8CM]

This has been an interesting thread, to say the least.  Clearly, 
though, it has been a learning experience for me and I appreciate all 
the comments.

About ten-to-twelve years ago, I installed (and continue to use) my 
first router, a Linksys, 8-port, 803.11/b/g, wired model.  The router 
has never been near near my antenna; however, a computer is in close 
(<5') proximity to both the HF and VHF/UHF transceivers.   Bottom 
line, no noise problems on any ham band.

About five years ago, I added a Linksys wireless access 
point.  Still, no noise pollution.

Subsequently, I've installed and used two wireless routers a SMC 
803.11b and a Netgear 803.11/b/g.  The latter is not in proximity to 
any HF gear so I'm somewhat comparing apples and oranges; however, 
there appear to be no birdies on nearby standard broadcast or VHF/UHF 
gear and the SMC is as clean as the Linksys (albeit slower).

All of my cabling is CAT5 UTP; some commercially made, but 
off-the-shelf, and some that I've fabricated on site.  Nothing 
special, other than good engineering practice, regarding the installation.

RF stuff, excluding H-Ts, are properly grounded and coax-fed to the 
outside.  Once outside they feed either an automatic antenna coupler 
or a relatively matched (SWR<2:1) antenna.

There, FWIW, another block of anecdotal information.

73  <>  Carl


At 10:49 AM 1/10/2008, you wrote:
>I thinks that all situations may have different routers.  Different CAT cables
>have more internal twist in the wires than some. Different routers of the same
>manufacturer will have different spurs.  So many variables.  When I 
>first put in
>my router which was a Linksys B I had so much noise that I hated to 
>turn on the
>radio.  The higher bands were the worse.  17 meters and above.  Bought some
>shielded cables and 90% of it went away.  Had other ham friends do 
>the same and
>it made a big difference at their installation.  Never have heard of the pS
>being a problem but anything is possible.  At my second home I am moving into
>slowly, the 17 inch Gateway CRT monitor tears up the over the air TV that some
>low vhf channels are hard to watch.  The monitor is about 25 feet 
>directly below
>the tv antennas.
>
>Good luck , Dale
>
>Dale McGraw wrote:
>
> > I went to shielded ethernet cables at all points and it mad a tremendous
> > difference.,  Even on wired only routers.
> >
> > 73 Dale K0JXI
> >
> > Avi - Modi'im Orchards wrote:
> >
> > > I think someone here pointed out that it could be noise from 
> the wall-wart
> > > power supply that is giving you the trouble. Perhaps try a different
> > > wallwart, or some ferrite cores, or even, temporarily just for 
> the test, a
> > > battey pack at the correct voltage.
> > >
> > > -avi 4X6UA
> > >
> > > ----- Original Message -----
> > > From: "Dave Holford" <holford at cogeco.ca>
> > > To: "ICOM Reflector" <icom at mailman.qth.net>
> > > Cc: <yaesu at contesting.com>; <ft100 at yahoogroups.com>; 
> <rfi at contesting.com>;
> > > <yaesu at mailman.qth.net>
> > > Sent: Wednesday, January 09, 2008 22:41
> > > Subject: [Yaesu] 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
> > > >equipment.
> > > >
> > > >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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