[Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)

[Jim Bolit]

John,

You changed power supplies.

You changed cables.

You changed................

No telling what "fixed" the issue.

Jim
W6AIM



-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of David Ahrendts
Sent: Friday, February 5, 2016 5:16 AM
To: shadle at katzenfisch.com
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)

John, I’ll concur with Larry. I have several D-Link gigabit switches using CAT6 cable with no apparent noise, and I believe their “green” technology actually shuts off unused ports when not in use. Amazon.

David A., KK6DA, LA

> On Feb 5, 2016, at 1:48 AM, Larry Gauthier (K8UT) <K8UT at charter.net> wrote:
> 
> John,
> 
> I had a similar situation here with a LinkSys switch. Tried a NetGear switch and the birdies moved - but were still present. Solved the problem by moving all networked devices from cat5 10 mb to cat6 1000t gigabit ethernet.
> 
> -larry (K8UT)
> -----Original Message----- From: John Shadle
> Sent: Thursday, February 04, 2016 1:07 AM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] slightly OT -- acceptable network switch (aka 
> Linksysproduces birdies)
> 
> I just completed my K3S build and initial configuration. Woohoo. I was 
> tuning around the bands, and I noticed birdies *everywhere*. Every 
> 20-30Hz on 40m there was one -- and it was LOUD. I thought that 
> something was up with my build, but then started doing an internet search for "K3 birdies".
> I saw one person (from a 2010 post on this list) note that the birdies 
> could be coming from network devices (routers). A-ha!
> 
> Initially, I thought it had something to do with my ASUS wireless 
> router being extremely close to my operation location. I unplugged it, 
> and the noise went away. Then I plugged it back in and removed, one by 
> one, the connections to various devices (network storage, my shack 
> computer, and the line that runs to my upstairs office). It just so 
> happens that I had installed a network switch recently (produced by 
> Linksys, and on sale at Best Buy last week). I unplugged the cable 
> going to that switch, and the noise went away. I then plugged it back 
> in, and went to the office and disconnected the power from the Linksys switch. Noise is gone again.
> 
> So, I'm looking for a new network switch. Does anyone have advice on 
> what has worked for them?
> 
> Alternately, any idea on how to get the network switch from producing 
> these awful birdies?
> 
> I'm *not* looking for a new router -- but just a switch.
> 
> Thanks.
> -john NE4U
> Madison, WI
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David Ahrendts   davidahrendts at me.com   




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