Our noise generating treadmill is a NordikTrack APEX6100xi model. I think it is at least 10 to 12 years old.
73, phil, K7PEH On Apr 30, 2013, at 8:16 AM, Dave Van Wallaghen <[email protected]> wrote: > Interesting. I have an older treadmill here (15 years+) but have not seen > that type of RFI. The bad news is that it needs to be replaced and I'll > probably have this issue with a new one. > > Good news is though that I can't work out and operate at the same time. And > the tv is usually not on if I'm in the shack unless the wife is home at the > same time. Usually not very often though. > > Amazing the sources of RFI these days. I'm still hanging on to most of my 15+ > year old appliances just to stay away from newer RFI generators. But like you > said, they can radiate over some long distances so I'm sure I'll hear my > neighbors stuff like Fred. > > Looks like I might have to pour over Jim, K9YC's RFI doc again ;-) > > 73, > Dave W8FGU > > > > On 04/30/2013 11:03 AM, Phil Hystad wrote: >> RFI... >> >> I have a very pronounced noise on my K3 (and, my Icom Pro III too) on the 80 >> meter band and it has peaks about 20KHz apart. Very broad (P3 wave form >> about 6000 Hz wide and it has slightly bell-shape) and very distinctive in >> the noise sound you hear on SSB audio. >> >> I know the source though -- it is my wife on the treadmill. You can almost >> see and hear the motors and treadmill belt moving by the subtle pulsating of >> this RFI on the K3 and P3. It is strong too -- peaks at about 40/9. And, >> as an experiment, I got into my truck with my mobile rig (Icom 706) and >> drove off. I was a quarter of a mile away by the time the signal strength >> dropped to a level that I could not hear it anymore. So, if this is the >> kind of thing bothering you it does not need to be close. >> >> The good news is that we both prefer going to LA|Fitness rather than work >> out in our little home gym so this is no longer a big issue but it still >> happens maybe a few times a month when my wife chooses to work out here. >> But, usually that is when I am at work or not on 80 meters which is almost >> always at night. >> >> 73, phil, K7PEH >> >> >> On Apr 30, 2013, at 7:29 AM, Dave Van Wallaghen <[email protected]> wrote: >> >>> Fred, >>> >>> I have a plasma tv here and that sounds close to what I see when it is on. >>> It pretty much wipes out the AM BC band and very ugly for all ham bands >>> 160-10m. I can take a snapshot with my P3 and send it to you if you'd like >>> to compare. >>> >>> Ironically, I just had a daytime RFI issue resolved here. It started a few >>> months ago. I would come home from work in the morning and listen around >>> for awhile and notice the noise would start when the sun came up. >>> Eventually, I noticed it went away at night. It was prominent on 160-20m >>> and it was only detectable on my vertical dipole. I could not hear it on my >>> doublet about 60' away. It was like very rapid lightning type pulse noise. >>> I was starting to think one of my neighbors may have installed a new solar >>> panel array. >>> >>> Long story short, I finally eliminated power sources in the house without >>> relief. I then realized that the vertical dipole was near a garden with >>> some 2-3 year old solar lights my wife put in there. Removing the lights >>> and batteries eliminated the noise. A couple of the fixtures had water in >>> them and my guess is they were the problem. Crazy to think a little solar >>> charger like that could raise so much hell ;-) >>> >>> 73, >>> Dave W8FGU >>> >>> >>> On 04/29/2013 10:17 PM, Fred Jensen wrote: >>>> I usually check into the No Cal Net on 3533 each night. I've begun to >>>> get predictable noise with a unique signature on the P3 WF. It's a >>>> series of bands, the first [around 3545] is the widest, they get >>>> narrower up from that and the separation seems to be about 40 KHz. The >>>> higher components get narrower but aren't any weaker. >>>> >>>> Occasionally I've see it come on to an otherwise quiet band, and all the >>>> "bands" on the WF drift some before stabilizing. >>>> >>>> I have a screen shot from the P3 I'll send, anyone have any idea what >>>> this is? I never see it in the daytime on any band, just in the >>>> evening, which is suspicious ... plasma TV? >>>> >>>> If it's my neighbor Casey, I'll just need to live with it, we don't do >>>> battle with our neighbors. Besides, Sampson, their cat, gets along with >>>> ours and shares his food. >>>> >>>> 73, >>>> >>>> Fred K6DGW >>>> - Northern California Contest Club >>>> - CU in the 2013 Cal QSO Party 5-6 Oct 2013 >>>> - www.cqp.org >>>> >>>> ______________________________________________________________ >>>> 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 >> >> ______________________________________________________________ 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
