I've used the MFJ-1026 combined with the NB/NR in the K3 to greatly reduce all kinds of strange noise from the city. Often I need to start with the MFJ-1026, to null out as much as possible and then I hit the NB to get the rest. It's a fairly powerful combination.
On Mon, Nov 21, 2011 at 9:33 AM, Bob K6UJ <[email protected]> wrote: > Mark, > > If you noise source is in one main direction which it sounds like then the > MFJ 1026 noise canceler works wonders. If it is coming from > other directions too then it wouldn't be the ticket. > I have used the 1026 to null out the noise from an offending power pole that > is about 100 yards from my house. My noise was about s8 to s9plus > with spikes. Operating on CW with a narrow filter setting and finding the > best NB and NR settings on my K3 gave me reasonable results > on reducing the noise enough to copy DX CW. Very weak CW sigs were still > impaired however. > I had our power company come out two times to remedy the noise situation. > When they came out the noise wasn't there (naturally) my noise was > intermittent like yours. I purchased the 1026 and successfully used it to > combat the noise. In the mean time I decided to do some detective work > on my noise situation myself hoping to show the power company the source > myself. I have a Kenwood handheld that receives the aircraft AM band > and I have a 4 element 2 meter beam unused so I clamped the beam on a one > foot long wood round bar and velcroed the handheld to the bar. > I was able to zero in quite easily to the offending pole aiming the 2 meter > beam and walking back and forth. ( I was a source of entertainment for my > neighbors, hihi.) > I called the power company and told them I had located the noise source with > my specialized RFI equipment ( I had to tell them something to get them out > here again. hihi) > and would like to show them if they could come out. > The power company technician came out and as luck would have it the noise was > there when the was there ! He was impressed with the zeroing in with > my set up. I had narrowed it down to the offending pole but couldn't zero > in any closer. He had a small hand held dish and noise receiver combo with > him and > was able to pinpoint the source even closer. Some of the old hardware was > arcing. He put in a ticket and 2 weeks later the hardware was replaced on > this pole. > Noise went away ! > Now I have another new source of noise coming from our city park in the > opposite direction. (it never ends) Not as bad as the previous source but > with a little > luck I can eliminate it also. > Your situation may be different than mine but if the noise is coming from > one direction it is a lot easier to deal with. > (Using the MFJ 1026 for instance.) What I would do first is to make sure it > isn't coming from inside your home. Run your HF rig off a 12 volt battery > temporarily > and shut off the main breaker to the house. Then if it still is there, take > a portable radio that receives AM and start walking around your neighbor hood > noting the > signal strength of the noise. The power lines act as antennas for radiating > the noise so it will be carried for quite a ways down the lines. Hopefully > you will find the noisy > pole which will be much louder than the rest. If you have a handheld with > the Aircraft AM band I would use it even with the rubber duck antenna. The > radiated noise doesn't carry as far on VHF so you will be able to narrow it > down easier to the offending pole. It could be coming from a neighbors house > also, the AM portable radio approach is good > in either case to start your sleuthing. > Good luck on solving your noise problem. Hope this helps a little. > > 73, > Bob > K6UJ > > > > > On Nov 21, 2011, at 7:57 AM, [email protected] wrote: > >> Hello fellow K3 Owners. I have finally discovered that AC Interference from >> the pole across the street is getting into my antenna and then of course I >> see it on my S-meter on the K3. On Saturday I had this interference all day >> and I finally went out with a portable AM Radio and found out that it was >> that particular pole. What's amazing is that at 10:15 PM the noise was gone >> and I went out to the pole again with my AM radio and the noise was gone. I >> have reported this to Philadelphia Electric Company. But the problem is >> that the interference is sporadic in nature and doesn't happen all the time. >> >> Does anyone know if there is a filter that one can hook up to there antenna >> that would eliminate this interference before it gets into my K3? When I >> don't have the interference HF is a wonderfull thing, but when I have the >> interference I get a lousy S-5 to S-7 reading on my S-Meter. And >> suggestions would be much appreciated!! Mark KB3Z >> >> ------------------------------ >> Sent using Verizon.net Mobile >> ______________________________________________________________ >> 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 > > ______________________________________________________________ > 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 > -- ------------------------------------------- Owner, worldwidedx.com AE6LX, Amateur Radio NNN0ITA, Navy MARS NNN0GAF FOUR, Southern CA Training Director, Navy MARS ______________________________________________________________ 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
