George, It really depends on the type of noise. The various outboard DSP units are quite helpful improving selectivity of older radios, clarity by reducing some background noise, etc. I don't recall them being effective with impulse and/or broadband noise typically associated with things like powerlines, mercury or sodium vapor lights, etc. On occasion you may find a rig's noise blanker can help, but unfortunately few NBs perform well.
Some years ago out of the blue I got hit with S9+ noise across all bands almost 24 hrs a day. Powerlines are underground. Spent days tracking it. Then one day while raking leaves I noticed my neighbor's sodium vapor floodlights were flickering...a symptom the lights were on their last legs, but long legs since it took months for them to finally go kaput. I purchased a Timewave ANC-4 unit and installed a noise sensing antenna. With time and patience to experiment with antenna placement and the ANC-4 settings I was able to get the noise from S9+ to S2. But again, it took a lot of time and patience to get there and it worked for that particular type of noise...may not work for others. I seem to recall a link somewhere on the ARRL website that takes you to a page where various noise samples are recorded. This may be a good place to start so you can get a sense of a particular noise source that may be causing much of your grief. Harry WE1X -- View this message in context: http://n2.nabble.com/K3-3934-live-and-running-tp4672206p4673877.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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
