Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
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 <caut...@montac.com>
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] slightly OT -- acceptable network switch (aka
Linksysproduces birdies)
Message-ID: <56b4a709.5020...@montac.com>
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:
dubus...@gmail.com
__
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Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
come out of retirement... Y'all have a wonderful morning. LIFE is GOOD because you read this... which means you are alive! 73, __ Clay Autery On 2/7/2016 4:04 AM, Edward R Cole wrote: > 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 <caut...@montac.com> > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] slightly OT -- acceptable network switch (aka > Linksysproduces birdies) > Message-ID: <56b4a709.5020...@montac.com> > 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: > dubus...@gmail.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to caut...@montac.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
Bob, Could it be that fiber optics cable is the reason? Not much RFI from photons. Not everyone has access to fiber. Recently our commercial power was knocked off by a falling tree so only I had power (from my Honda Gen) and I noticed that the "RF world" was a whole lot quieter. One could surmise that this was due to no line noise, but also no neighbors had power for their wi-fi's, plasma TV's, grow lights, garage arc welders, etc. This also told me my home appliances were clean! So that limits what one can do short of hooking up dummy loads for antennas. On HF you might try RF filters but that is not a smart thing to do in front of eme low noise figure preamps (i.e. filter insertion loss translates directly into higher NF and the sensitivity of your eme system is destroyed). Be nice to have fiber...maybe we'll get it about the time you install quantum-linked internet. ;-) 73, Ed - KL7UW --- Our system arrives with fiber underground to the box the TELCO provided on the end of the house. ==snip To me it is very puzzling why so many seem to have issues and a few do not. I could elaborate about station equipment connectivity. It would most likely start a controversy as to what is correct and what is incorrect. My point, if one is having issues, this should trigger a thought to investigate how and what is configured with the station. In some cases, I'm sure certain equipment is more prone to generate noise/birdies than others. 73 Bob, K4TAX 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: dubus...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
I have seen some cheap "CAT5/6" jumper cables designed to hook the network device to the jack in the wall, that were purchased on E-Bay. Nuff said. I suspect they were made with stranded conductor wire which is NOT spec. They were just a little too flexible. Cable made by Anixter, Avaya, and Belden are top notch, Anixter tests every batch for compliance with the applicable RFC. I'll bet Avaya and Belden do too. Problem is you've got to buy 1,000'. On 2/6/2016 11:01 PM, Clay Autery wrote: 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 -- R. Kevin Stover AC0H ARRL FISTS #11993 SKCC #215 NAQCC #3441 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
Yes, everything that radiates around your house and even outside your QTH for up to several miles will basically be additive to the noise floor. Take away the electricity from a couple of miles around and you'd be surprised how quite things become. As to fiber, I can't say our previous copper installation contributed to noise unless the offending signal was piggybacked as a host and thus induced into the copper service. As I have done a bit of EME, VHF & UHF , I do understand how every 0.1 dB of any loss contributes to a higher NF on receive. I'm surprised to learn that your Honda Generator is clean. Mine sure isn't. Of course it is an inverter style thus it has switching pulses. 73 Bob, K4TAX On 2/7/2016 4:22 PM, Edward R Cole wrote: Bob, Could it be that fiber optics cable is the reason? Not much RFI from photons. Not everyone has access to fiber. Recently our commercial power was knocked off by a falling tree so only I had power (from my Honda Gen) and I noticed that the "RF world" was a whole lot quieter. One could surmise that this was due to no line noise, but also no neighbors had power for their wi-fi's, plasma TV's, grow lights, garage arc welders, etc. This also told me my home appliances were clean! So that limits what one can do short of hooking up dummy loads for antennas. On HF you might try RF filters but that is not a smart thing to do in front of eme low noise figure preamps (i.e. filter insertion loss translates directly into higher NF and the sensitivity of your eme system is destroyed). Be nice to have fiber...maybe we'll get it about the time you install quantum-linked internet. ;-) 73, Ed - KL7UW --- Our system arrives with fiber underground to the box the TELCO provided on the end of the house. ==snip To me it is very puzzling why so many seem to have issues and a few do not. I could elaborate about station equipment connectivity. It would most likely start a controversy as to what is correct and what is incorrect. My point, if one is having issues, this should trigger a thought to investigate how and what is configured with the station. In some cases, I'm sure certain equipment is more prone to generate noise/birdies than others. 73 Bob, K4TAX 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: dubus...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rmcg...@blomand.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
I tried putting loads of mix 31 toroids on the lines, and it did very little. I'm wondering of moving to gigabit will change things. I tried using different power supplies I had on hand, but those had absolutely no effect on the noise. It's coming from the network switch. -john NE4U On Feb 6, 2016 11:24 AM, "Larry Gauthier (K8UT)" <k...@charter.net> 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@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 <davidahren...@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) <k...@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@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 >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net <Elecraft@mailman.qth.net> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to k...@charter.net >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net <Elecraft@mailman.qth.net> >> >> This list hosted by: http://www.qsl.net >> P
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
I am of the opinion that most if not all the issues associated with "noisy networks" is cheap switching power supplies that comes with the equipment. Cat5/6 cable in and of itself is pretty immune to noise pickup because of the twist in the conductors. That twist is there to knock down crosstalk on the 4 pairs when in full duplex Ethernet service. The only warning I'm aware of concerning routing of Cat5/6 is to keep it away from power runs. Most definitely do not run it parallel for any distance with unshielded romex, and if you have to cross romex do it perpendicular to the romex run. I've seen new houses built with all the wire running parallel in a piece of conduit in the wall. Looks pretty but a recipe for all sorts of problems like slower than expected or advertised network performance etcPower up from the basement and Ethernet down from the attic is a good idea. On 2/6/2016 12:03 PM, Bob McGraw K4TAX wrote: After reading all of this, I investigated my system here. First, no birdies found on any of the bands. WHEW! Noise on the 160M center fed wire w/balanced feed line is about S-3 this morning, noise on the coax fed 75M inverted V is S-2, and noise on the coax fed 40M inverted V is S-3, and noise on the coax fed 20M inverted V is S-3. These seem to be a bit higher then normal but it is Saturday and everybody is home in the neighborhood. Our system arrives with fiber underground to the box the TELCO provided on the end of the house. Out of that box runs a CAT5E cable up the wall, into the attic, across the attic and drops through the ceiling, then around the bookcase desk to the modem/switch sitting under the desk.The modem/switch is a CISCO LinkSys EA4500. Two of the ports are being used, printer and laptop, and the other two are open. The power for the modem/switch, power for the computer, the printer, the CLF lamp on the desk along with the radios all come from one power source being a dedicated 20A service back to the main breaker panel, again at the far end of the house, on the inside wall, being the same wall the CAT5E cable runs up to the attic. The run from the TELCO box to the station is about 75 ft. Same from the breaker panel to the operating position for station and amp power. Those feeds are #12-2 w/ ground and #10-3 w/ground respectively. Being in the middle and upstairs of a 2 story house there is no station ground to the outside world, other than the provided safety 3rd pin ground as required. I do have a dedicated 240V 20A service for the amp and that service is in the attic back to the main breaker panel. Antennas are all above the roof, no more than 50 ft and less with the tower at the corner of the house, and mostly less with a couple, 40M wire and 20M wire actually having the ends terminated at the eve of the 2nd story. The point being, there is not a lot of physical separation between the CAT5E cable and the antennas and power wiring. To me it is very puzzling why so many seem to have issues and a few do not. I could elaborate about station equipment connectivity. It would most likely start a controversy as to what is correct and what is incorrect. My point, if one is having issues, this should trigger a thought to investigate how and what is configured with the station. In some cases, I'm sure certain equipment is more prone to generate noise/birdies than others. 73 Bob, K4TAX -- R. Kevin Stover AC0H ARRL FISTS #11993 SKCC #215 NAQCC #3441 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
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@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 <davidahren...@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) <k...@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@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 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net <Elecraft@mailman.qth.net> This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k...@charter.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net <Elecraft@mailman.qth.net> This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to davidahren...@me.com David Ahrendts davidahren...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k...@charter.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
After reading all of this, I investigated my system here. First, no birdies found on any of the bands. WHEW! Noise on the 160M center fed wire w/balanced feed line is about S-3 this morning, noise on the coax fed 75M inverted V is S-2, and noise on the coax fed 40M inverted V is S-3, and noise on the coax fed 20M inverted V is S-3. These seem to be a bit higher then normal but it is Saturday and everybody is home in the neighborhood. Our system arrives with fiber underground to the box the TELCO provided on the end of the house. Out of that box runs a CAT5E cable up the wall, into the attic, across the attic and drops through the ceiling, then around the bookcase desk to the modem/switch sitting under the desk.The modem/switch is a CISCO LinkSys EA4500. Two of the ports are being used, printer and laptop, and the other two are open. The power for the modem/switch, power for the computer, the printer, the CLF lamp on the desk along with the radios all come from one power source being a dedicated 20A service back to the main breaker panel, again at the far end of the house, on the inside wall, being the same wall the CAT5E cable runs up to the attic. The run from the TELCO box to the station is about 75 ft. Same from the breaker panel to the operating position for station and amp power. Those feeds are #12-2 w/ ground and #10-3 w/ground respectively. Being in the middle and upstairs of a 2 story house there is no station ground to the outside world, other than the provided safety 3rd pin ground as required. I do have a dedicated 240V 20A service for the amp and that service is in the attic back to the main breaker panel. Antennas are all above the roof, no more than 50 ft and less with the tower at the corner of the house, and mostly less with a couple, 40M wire and 20M wire actually having the ends terminated at the eve of the 2nd story. The point being, there is not a lot of physical separation between the CAT5E cable and the antennas and power wiring. To me it is very puzzling why so many seem to have issues and a few do not. I could elaborate about station equipment connectivity. It would most likely start a controversy as to what is correct and what is incorrect. My point, if one is having issues, this should trigger a thought to investigate how and what is configured with the station. In some cases, I'm sure certain equipment is more prone to generate noise/birdies than others. 73 Bob, K4TAX 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@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 <davidahren...@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) <k...@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@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,
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
The answer for me was shielded CAT 5. Different switches just produced noise at different places. Was also greatly affected by devices plugged in. On 02/06/2016 01:11 PM, Kevin Stover wrote: > I am of the opinion that most if not all the issues associated with > "noisy networks" is cheap switching power supplies that comes with the > equipment. Cat5/6 cable in and of itself is pretty immune to noise > pickup because of the twist in the conductors. That twist is there to > knock down crosstalk on the 4 pairs when in full duplex Ethernet > service. The only warning I'm aware of concerning routing of Cat5/6 is > to keep it away from power runs. Most definitely do not run it parallel > for any distance with unshielded romex, and if you have to cross romex > do it perpendicular to the romex run. > > I've seen new houses built with all the wire running parallel in a piece > of conduit in the wall. Looks pretty but a recipe for all sorts of > problems like slower than expected or advertised network performance > etcPower up from the basement and Ethernet down from the attic is a > good idea. > -- /* * Amateur Radio Station AC0HY* * W. Paul Mills SN807* * Assistant EC Alpha-1 ARES Shawnee/Wabunsee, KS * * President Kaw Valley Amateur Radio Club* */ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
On Sat,2/6/2016 9:24 AM, Larry Gauthier (K8UT) wrote:
I could not migrate to gigabit ethernet from 10 MBPS because the CAT5
cable I was using only had two available pairs.
I'm confused by this statement. CAT5, 5e, and 6 are four pair cables.
The pairs have a tight twist but each has a different twist ratio
("lay") to minimize crosstalk. If the cables are wired per the Ethernet
standard, each circuit should utilize one of the pairs, and in a
specified order. What am I missing?
Now, we can do lots of things with that cable besides Ethernet -- I use
it for RS232 and for running telephone pairs around my home.
73, Jim K9YC
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Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
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@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 <davidahren...@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) <k...@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@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 >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net <Elecraft@mailman.qth.net> >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://w
Re: [Elecraft] slightly OT -- acceptable network switch (aka > Linksysproduces birdies)
Bob, Just a quick question here. Are your power feeds Romex/NM, or is everything run in conduit? Would/could that make a difference (i.e. can electrical noise from a device such as a modem/router or its power supply be radiated via the home's AC wiring?) TNX/73, Al On Sat, 6 Feb 2016 12:03:39 -0600 Bob McGraw K4TAX wrote: > After reading all of this, I investigated my system here. First, no > birdies found on any of the bands. WHEW! Noise on the 160M center fed > wire w/balanced feed line is about S-3 this morning, noise on the coax > fed 75M inverted V is S-2, and noise on the coax fed 40M inverted V is > S-3, and noise on the coax fed 20M inverted V is S-3. These seem to be a > bit higher then normal but it is Saturday and everybody is home in the > neighborhood. > > Our system arrives with fiber underground to the box the TELCO provided > on the end of the house. Out of that box runs a CAT5E cable up the > wall, into the attic, across the attic and drops through the ceiling, > then around the bookcase desk to the modem/switch sitting under the > desk.The modem/switch is a CISCO LinkSys EA4500. Two of the ports > are being used, printer and laptop, and the other two are open. The > power for the modem/switch, power for the computer, the printer, the CLF > lamp on the desk along with the radios all come from one power source > being a dedicated 20A service back to the main breaker panel, again at > the far end of the house, on the inside wall, being the same wall the > CAT5E cable runs up to the attic. The run from the TELCO box to the > station is about 75 ft. Same from the breaker panel to the operating > position for station and amp power. Those feeds are #12-2 w/ ground and > #10-3 w/ground respectively. Being in the middle and upstairs of a 2 > story house there is no station ground to the outside world, other than > the provided safety 3rd pin ground as required. I do have a dedicated > 240V 20A service for the amp and that service is in the attic back to > the main breaker panel. > > Antennas are all above the roof, no more than 50 ft and less with the > tower at the corner of the house, and mostly less with a couple, 40M > wire and 20M wire actually having the ends terminated at the eve of the > 2nd story. The point being, there is not a lot of physical separation > between the CAT5E cable and the antennas and power wiring. > > To me it is very puzzling why so many seem to have issues and a few do > not. I could elaborate about station equipment connectivity. It would > most likely start a controversy as to what is correct and what is > incorrect. My point, if one is having issues, this should trigger a > thought to investigate how and what is configured with the station. In > some cases, I'm sure certain equipment is more prone to generate > noise/birdies than others. > > 73 > Bob, K4TAX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
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 <davidahren...@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) <k...@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@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 > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net <Elecraft@mailman.qth.net> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to k...@charter.net > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net <Elecraft@mailman.qth.net> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to davidahren...@me.com > > > > > > David Ahrendts davidahren...@me.com > > > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
John, You changed power supplies. You changed cables. You changed No telling what "fixed" the issue. Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Ahrendts Sent: Friday, February 5, 2016 5:16 AM To: sha...@katzenfisch.com Cc: elecraft@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) <k...@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@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 > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > k...@charter.net > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > davidahren...@me.com David Ahrendts davidahren...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jbol...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
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@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 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k...@charter.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] slightly OT -- acceptable network switch (aka Linksysproduces birdies)
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 On 2/5/2016 3:48 AM, Larry Gauthier (K8UT) 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) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
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) <k...@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@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 > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to k...@charter.net > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to davidahren...@me.com David Ahrendts davidahren...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
