Hi Lee... Could be a lot of things, from an electric fence to a gas furnace igniter.
First thing to try is to see if you can pin down a direction, say with a loop type antenna. If you have a portable AM/FM radio, you might see if you can hear it at the top of the AM band, and use the directional loopstick antenna in that to give you a direction. Then triangulate on it. I am guessing that you are hearing it on an outside dipole or beam. See if you can hear it on a short wire in your shack as well. That will give you a clue as to how close it is to your QTH. If you are using a beam, does rotating it change the signal strength? Given the fact that it has an on/off cycle, it could well be someone's furnace with some kind of PWM control on the blower. Unfortunately, there are lots of possibilities, and it may take a bit of detective work to locate the source, and a lot of diplomacy to get it stopped. Keep us posted. Tom Holmes, N8ZM Tipp City, OH EM79 > -----Original Message----- > From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net] > On Behalf Of kc9...@aol.com > Sent: Tuesday, December 21, 2010 8:36 PM > To: drakelist@zerobeat.net > Subject: [Drakelist] OT Help on RF interference (New QTH) > > Darn ....new QTH...I am finding a BIG problem, here. > I have a pulsing RF noise about every 40-50 KC. If it were audio I > would describe it as the sound of an old pump, (maybe 10 times a > second) or something. It does top and go...tonight about every 10-15 > minutes or so...ot exactly though. It's winter here. > > > The signal is about 20 KC wide and repeats ever 50 KC. > starts at 80 mtrs goes all the way to 10. > > Any ideas, or is there a better list to go to for help on this. > Yes, I have turned off evey breaker in my house in sequence...it ain't > here. > > Closest neighbor is about 250 ft. > I'm at a small lake out in the country with maybe 180 houses around > it...only 30% here this time of year. > > 73, > Lee > > > > > _______________________________________________ > Drakelist mailing list > Drakelist@zerobeat.net > http://mailman.zerobeat.net/mailman/listinfo/drakelist _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
