I have recently moved to a new QTH and am slowly getting things in shape to get back on the air. I ran into a lot of nasty RFI problems. The previous owner had installed "smart house" wall switches throughout the house. They were supposed to control incandescent lamps only, but in fact they controlled fans, wall outlets, etc. Besides sending a few entertainment radios to the dump before I figured out what was going on, the RFI was horrendous. Gradually I removed them only to find I still had problems. While doing some electrical work an electrician found the signal injector for the system behind the main breaker panel, and that eliminated nearly all the noise.
I should say nearly all the broadband noise, as I was left with birdies about every 30 kHz or so. Eventually I tracked those down to a Linksys Wireless G router, model wrt54gs. My previous Linksys bit the dust just before I moved, so I can't say if I would have heard the birdies from this one had I installed it in the old QTH. I have wireless and wired connections running off this router, and have helped the problem by installing ferrite on the power wart lead and all the data leads. But I have not been able to eliminate the rather broad birdies that seem to fall at nice dx frequencies. Has anyone on the reflector had such a problem and found a way to cure it? Searching on the internet I find that RFI from routers is a well known phenomenon, but I have seen no suggestions for curing the problem. Bob W2WG -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob - W5BIG Sent: Wednesday, August 10, 2005 9:32 AM To: tom.w3qs; 'Elecraft Reflector' Subject: Re: [Elecraft] Interference from Computers Hi Tom, One major source of noise is the CRT monitor. It helps to make the screen display as uniform as possible, like a blank window or a plain background without texture. 73/ Bob - W5BIG ----- Original Message ----- From: "tom.w3qs" <[EMAIL PROTECTED]> To: "'Elecraft Reflector'" <elecraft@mailman.qth.net> Sent: Wednesday, August 10, 2005 7:03 AM Subject: [Elecraft] Interference from Computers > Good Morning Group, > > I am back on the air (4991) after nearly 20 years. The first thing I > noticed was all the interference on 20 meters. Hetrodynes everywhere! > What's going on? > > Took me a while to figure out that it was the computer - not there 20 years > ago! > > So, other than removing it from the shack (ghastly thought) is there any > font of wisdom on this subject or general guidance? > > Thanks and 73, > > Tom, W3QS > > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
