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

[Clay Autery]

ALL Cat-5 and CAT-5e is 4-pair wire.   All Cat-5 wires are NOT alike... 
Just like NOT all HF+6 radios are alike...  Buy "Elecraft" quality
CAT-5e cables, and you shouldn't have to worry about it.  Unless you're
worried about signal leakage arounf or above the design frequency of
near about 300 MHz.

If y'all really want to know the concrete vs. spec diffs in Cat-5e to
CAT-6, again... I will outline them to you...

Cannot imagine what kind of wire you think was 2-pair and Cat-5.... 
Only POTS wire is usally seen as 2 pair... and I'm pretty sure it is not
twisted pair...  Even CAT-3 is 3-pair...

Whatever works for you, though.

______________________
Clay Autery

On 2/6/2016 11:24 AM, Larry Gauthier (K8UT) wrote:
> John
>
> I think I have been mis-understood; or perhaps I mis-spoke. ;-)
>
> I could not migrate to gigabit ethernet from 10 MBPS because the CAT5
> cable I was using only had two available pairs. I replaced the CAT5
> with CAT6 with 4 available pairs, but that alone would not have solved
> my birdie problem. The real "fix" was in the move from 10 -> 1000. I
> do not believe that changing cables alone will solve your problem.
>
> -larry (K8UT)
> -----Original Message----- From: John Shadle
> Sent: Friday, February 05, 2016 10:14 AM
> To: David Ahrendts
> Cc: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] slightly OT -- acceptable network switch (aka
> Linksysproduces birdies)
>
> Thank, all. I may have to look into that. It may just involve changing
> out
> some runs of the cable. I used either CAT5 or CAT5e in all my runs. Just
> odd that the noise is coming from the one location and not the others,
> though. Ah well!
>
> -john NE4U
>
> On Fri, Feb 5, 2016 at 8:15 AM, David Ahrendts <davidahrendts at me.com>
> wrote:
>
>> 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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