[RFI] Wired vs Wireless Routers for RFI

Leigh L Klotz, Jr. Leigh at WA5ZNU.org
Wed Jan 9 19:02:31 EST 2008

This has been my experience as well.  I went one better and purchased 10 
megabit fiber on eBay.  The dober to 10baseT converters run off 5v 
supplies and cost about $30 each.  I got some PCI cards with fiber 
instead of 10BaseT connectors for $10 each.  The ST connector multi-mode 
fiber is inexpensive and can often be scrounged from workplaces that 
have moved to gigabit single-mode or to more modern connector styles.

For the neighbors I still plan to give the gift of toroids, though.

On Wed, 9 Jan 2008 10:18 am, K4RO Kirk Pickering wrote:
> Hello John,
> I wonder what speed Ethernet you are running?
> I have tried 3 different brands and vinatges of
> wired hubs for my home 10-base-T network. Every
> device tried caused terrible RFI at 100MBPS. I finally
> reverted to using a 15-year old 10-base-T hub, which
> forces all the cards to run at 10 instead of 100MBPS.
> With this hub, I run three servers (Linux) and two desktops
> (one XP and one Mac) in the house with minimal RFI.
> I rarely notice the difference in speed except when
> moving really huge files across the network.
> 73
> -Kirk  K4RO
> On Wed, Jan 09, 2008 at 09:16:34AM -0800, 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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