Hi Dave, I have a similar type noise in our neighborhood. By doing some DF'ing, we've pinned it down to a neighbor's house, but haven't been successful yet in gaining their confidence to let us explore beyond their front door. Can here it on VHF when we're at their front porch.
Is it "time synced", i.e. is the accuracy such that it's being derived from a 60Hz/Xtal time base. In my case, it's not. It comes on for APPROX 12 seconds and goes off for APPROX 3 seconds, but if I listen to it over a few minutes, it will drift up or down. Also, I noticed I can hear it at ~ 16.7KHz "offsets", which makes me think it could be PC video related. Not sure if it could be switching power supply related, I thought most of them were 100's Khz. Actually, It had been across the full 20M band last year when we were DF'ing, but now it's "discrete". I have a wav file I can send you if that would help. Fortunately, it's been down to S2-3 as of late. It also seems to be tied to colder weather (thermostat control??). BTW, the neighbor is 300-400 feet away in a suburban area (70' x 120' lots) . W5AHC is another ham in the neighborhood and he's ~100 fett closer and hears it as well. Hope this helps. Let me know what it ends up being. tnx es 73 Bruce - W3NJ --- In digitalradio@yahoogroups.com, Dave 'Doc' Corio <[EMAIL PROTECTED]> wrote: > > Wonder if anyone has encountered this type of noise. It's a raspy, > pulsating sound. It lasts 10 seconds, is silent for 5, then starts again > The pulses are about 5 per second. > > It's showing up on a lot of bands. Right now I have it at about > 21.048, but have heard it on several ham frequencies. > > We haven't added any new electronics in the house at all. We are in > a rural setting, with the nearest neighbor several hundred feet away. We > do have cable TV and cable internet, and I wonder if this might be a > "test birdie" I've heard mentioned in the past. It seems to run 24/7, > and just started up within the last few days. > > Any ideas? > > Thanks in advance > 73 > Dave > KB3MOW >
