Can someone share with me the expected birdie frequencies for these
routers? I use a Netgear wired router and a Netgear wireless router
and I've never noticed any birdies from either of them. The only
birdies I see on 20m are 60KHz apart and apparently coming from
another house since I can DF them with my yagi and eliminate them by
orienting my yagi in the appropriate direction. What typical
residential devices would generate birdies at 60Khz intervals? It
sounds like a typical switching power supply, but for what? A PC?
On 1/9/08, Leigh L Klotz, Jr. <Leigh@wa5znu.org> wrote:
> 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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