Mike W0MU gave a good beginning, only there is more to the story. (I gave a class on RFI this past February to our club, so the topic is still fresh in my mind.)
There may be devices in your house or on your grounds that are battery-operated, run continuously and may emit RFI. The batteries must be removed to stop that equipment from operating. BTW, I wish I could figure out an easy way to reply to a posting here; I know I must be doing this the hard way. 73 Jerry KM3K Message: 19 Date: Thu, 01 May 2014 23:05:20 -0600 From: W0MU Mike Fatchett <[email protected]> To: [email protected] Subject: Re: [Elecraft] KX3 & Chasing local HF noise sources Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Run the KX3 on battery and turn off your house mains and see if the noise goes away. If not you know to start looking elsewhere. You might also try the RFI reflector. Mike W0MU On 5/1/2014 10:47 PM, Niel Skousen wrote: > Good Evening All, > > Questions and Advice sought, i will report back on results... > (cross posted to qrp-l, elecraft, and kx3) > > I live in a rural area, which should be very low noise. i put up a OCFD (88:44) this afternoon, and tonite wandered on to 80m to listen and check the antenna. I had 20db over noise everywhere. 40m was showing S4 noise, and I could only copy about 4 or 5 stations above the noise on 40m (yep, NR and NB both on, 400hz wide). > > nearest neighbor is 1/4mi away, and I'm the last one on a rural overhead power line. > > So, Given a KX3 and internal batteries, my first thought is to build a small multi-turn electrostatically shielded loop (1ft dia, 3-5 turn in a copper pipe, 1" gap at top) and see if I can localize any local noise sources. > > my office and computers are prime targets of course... > > Is this overkill ? > Recommendations for a better small / near-field noise pickup ? > Any other advice for first steps ? > Anyone else chased noise sources with their KX3 ? How did it work, what antenna did you use ? > Other suggestions / recommendations ? > > TIA, 73 > Niel > WA7SSA ______________________________________________________________ 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 Message delivered to [email protected]
