K3 Birdies
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Thanks to all who answered me re birdies on every CW band in my K3. It turns out that, as many of you advised, certain modems radiate like crazy and cause lots of birdies. Now that I am at my summer home in NC, the birdies have flown away; the modem up here radiates nothing that I can hear on any band. Just thought I would post this in case any one else runs into this problem.
Bill N6FB ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Hi Bill,
That's great news. Please post the manufacturer and model number of the good modem. I'd dump my Linksys WRT54GL in a heartbeat if I knew of one that was less problematic. 73, Mike K2MK
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Hi,
Modem? You guys mean router? Ethernet cables are often a very bad source of birdies, but in my case the primary culprit was not the router itself, but the computers that were attached to the network via Ethernet. I am increasingly getting rid of Ethernet cables and replacing with wireless (WiFi). My new shack computer has wireless only and the connection to the serial server serving my remote KAT500 is also wireless. My router is the one Verizon provided for FIOS and I am finding it not too bad. AB2TC - Knut
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Hi Knut,
Yes, router of course. Momentary brain freeze. The Linksys WRT54GL is a combo wired/wireless router and I reduced its effect on the K3 by moving it to another room and adding a WIFI card to my desktop PC so I wouldn't have to run a CAT5 cable to it. But even with it in the next room it's RF output is noticeable on 20 through 6 meters. So I'm on the lookout for recommendations from K3 users on a clean router. 73, Mike K2MK
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In reply to this post by n6fb
I had an issue on 2m with birdies from my "then new" NetGear N300 w/
wireless router to my FT-847. Moving to the combination of the K3 and DownEast Microwave 144/28 transverter helped and running shielded cat6 wiring the most help (clamp-on ferrites did nothing for cat5e). I did note that "most" birdies were gone when the router was powered off (computer still on). There are birdies on both 6m and 10m as well. Many go away with disconnecting the antenna so probably originating from neighbors. Some years back we had a 2.4 GHz wireless camera monitor at the dog kennel but it got so none of the wifi channels were RFI free (just lots of parallel black bands on the TV display). I use to run 2401-MHz for ham satellites, but none are existing today so not running anything on 2.4. Our cordless phones are 5-GHz. We have upgraded to 3-GHz DSL so it might be time to opt for a faster router. Any suggestions of models with low RFI potential? My (2) desktops are generation 2008 XP32 with no wifi. I guess to try that option would require adding wifi adapters to an USB port? I did buy an aluminum chassis with thought to shield the router (but never go around to doing it). I suppose we should upgrade to a N750 router to take advantage of streaming video (N300 do not quite get there). 73, Ed - KL7UW http://www.kl7uw.com [hidden email] "Kits made by KL7UW" ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Mike K2MK
I had the same problem with my Lynksys. Replaced it with a Netgear and birdies are gone. Don't have the specific model number in front of me. YMMV.
Terry, W0FM -----Original Message----- From: Mike K2MK [mailto:[hidden email]] Sent: Monday, June 03, 2013 6:04 AM To: [hidden email] Subject: Re: [Elecraft] K3 Birdies Hi Bill, That's great news. Please post the manufacturer and model number of the good modem. I'd dump my Linksys WRT54GL in a heartbeat if I knew of one that was less problematic. 73, Mike K2MK n6fb wrote > Thanks to all who answered me re birdies on every CW band in my K3. > It turns out that, as many of you advised, certain modems radiate like > crazy and cause lots of birdies. Now that I am at my summer home in > NC, the birdies have flown away; the modem up here radiates nothing > that I can hear on any band. Just thought I would post this in case > any one else runs into this problem. > > Bill N6FB -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Birdies-tp7574682p7574686.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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On 6/3/2013 11:13 AM, Terry Schieler wrote:
> Replaced it with a Netgear and birdies are gone. Don't have the specific model number in front of me. Could you please look it up and post it for us? Mfrs who build stuff that's free of RF trash should be rewarded with our business, but many major mfrs make "good, better, best" products. As to cleaning RF trash with ferrite chokes -- to be effective, they must be "tuned" (by choosing the "right" mix and winding multiple turns) to be effective. Chokes can reduce ONLY the part of the trash radiated by the cable, but will have no effect on what is radiated directly by the equipment due to poor shielding and poor circuit layout. If the cables are electrically long (longer than about 0.05 wavelength), chokes are needed at both ends, because the equipment on both ends can be a source of the trash. And don't forget the power supply cables, both on the low voltage side and on the 120V side. "I tried some beads but they didn't work" usually means that the person doesn't understand how ferrite chokes work. Study http://k9yc.com/RFI-Ham.pdf 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by n6fb
On 4 Jun 2013 at 12:00, [hidden email] wrote:
> Message: 6 > From: "Terry Schieler" <[hidden email]> > To: "'Mike K2MK'" <[hidden email]>, <[hidden email]> > Subject: Re: [Elecraft] K3 Birdies > > I had the same problem with my Lynksys. Replaced it with a Netgear > and birdies are gone. Don't have the specific model number in front of > me. YMMV. > > Terry, W0FM Probably not the router/AP itself, more likely the cheap and dirty SMPS wall wart that powered it... 73. Dave G0WBX. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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