Hi Joe and gang, I found the source of my "birdie"... ended up being a Linksys 54g wireless router running a custom Linux kernel. The second I unplugged it from the mains, all noise dissipated on the K3. Amazing really that it was so easy to find! Special thanks to Bill W4ISH for pointing me in the right direction.
Anyway, any suggestions on isolating my feedline? Would ferrite chokes on the RG-8 work? I can't unplug the router for long periods of time as other machines in my house require a constant network connection. 73, James KC2UEE -----Original Message----- From: Joe Planisky [mailto:[email protected]] Sent: Wednesday, March 04, 2009 2:01 PM To: KC2UEE Cc: Elecraft list Subject: Re: [Elecraft] K3 birdies - question? I find a portable (i.e. battery powered) short wave receiver very useful for tracking down local sources of EMI. When I hear EMI that goes away when I remove the antenna on my K3, I get out my SWL receiver and tune it to the same frequency so I can hear the EMI on it. With the telescoping whip antenna partially extended, I walk around the house, placing the tip of the whip near suspected devices. It's usually very obvious when you find the emitter as the signal rapidly gets louder as you get close. I then make a note in my logbook of the frequency and the offending device so I know exactly which gadget to turn off if the need arises (assuming I can't easily fix the device.) It's a little less disruptive than switching off circuit breakers. 73 -- Joe KB8AP On Mar 4, 2009, at 10:35 AM, KC2UEE wrote: > Aha! I think you're on to something here Bill. > > My RG-8 actually snakes its away around one of my entertainment > centers > where I happen to have a cable modem, network switch, and seperate > wireless > router all in the same spot. I have a PS3, Xbox360, and an Onkyo TX- > NR905 > receiver all wired by CAT-5 into the switch, plus the wireless > router also > wired into the switch is only a few inches away. The RG-8 runs > behind all > of that stuff, and if I recall, I simply have the cat5 cable laying > loosely > around it. There also happens to be several wall-wart transformers > behind > the entertainment center, which I'm sure aren't helping the situation. > > When I get home, I'll try and turn off the network devices and see > what > happens. > > Like you, I'm also a computer geek hihi. I've got 2 home built > PC's, a > Mac tower, and 3 laptops floating around the house all networked > wirelessly. > > It never crossed my mind to check the network for EMI... thanks > again for > the suggestion! > > 73, > James KC2UEE ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
