Clay,
Perhaps. Several years ago I decided to try to minimize network
caused birdies by obtaining some clamp-on ferrites, but also bought
some shielded Cat 6 cable to replace generic Cat 5e in the
shack. The shielded Cat 6 was very effective in minimizing many 2m
birdies. The clamp-on's were largely ineffective.
I did this mainly to improve 2m for eme operation. I did not check
HF frequencies. Generally atmospheric noise floor is high enough to
bury birdies; 10m and 6m seem most effected. We bought a new Netgear
router (replaced Linksys) and I had some thoughts to enclose it in a
shielded enclosure with ferrites on outputs and cooling fan, but then
my wife acquired a ipad and kindle which all run on wifi...so
shielding would interfere.
I am considering building onto the garage a new 18x26 foot ham shack
so that might improve isolation from the router which would be 72
feet at the other end of the house. I still run wired internet
cabling to shack computers. I suspect the wifi in neighborhood is
bigger issue as is picked up thru the eme antennas and preamps.
I am about to disconnect the XP desk top computer from internet and
run e-mail and internet only on my laptop. Be interesting to see if
that impacts VHF birdies any appreciable amount (K3 and KX3 are
connected to the XP computer). I can eliminate the 5-port ethernet
switch when I do that and only run a single 25-foot +cable from the
router to laptop. Other thing will be elimination of all wall wart
PS in new shack (only have the one laptop PS unit).
----------
My laptop just acquired a 21-inch monitor (from my wife's old XP desk
top which is being recycled; she bought a new laptop last year with
win7 now upgraded to win10...and the desk top was never used after
that. Going thru a general "spring cleaning" to reduce household
clutter and computer got added.
So the shack now has two full-time computers with monitors which will
be handy when monitoring prop loggers and running special ham sw,
simultaneously.
73, Ed - KL7UW
-----------------------
Date: Fri, 5 Feb 2016 07:43:37 -0600
From: Clay Autery <[email protected]>
To: [email protected]
Subject: Re: [Elecraft] slightly OT -- acceptable network switch (aka
Linksysproduces birdies)
Message-ID: <[email protected]>
Content-Type: text/plain; charset=windows-1252
If changing the cabling was the solution for your "birdies" then it
would appear the issue was not with the switch hardware, but with poorly
constructed cables.
There are a LOT of CAT-5 and CAT-5e labels on cables out there that
simply aren't. There's a list of specs involved, fairly lengthy one,
all of which must be met to qualify a cable at a specific grade.
Most cables that fail a check because they missed something in the
termination procedure (not signal routing).
______________________
Clay Autery
MONTAC Enterprises
(318) 518-1389
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
[email protected]
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