Hello, not only the "defective" LED lamps makes the noise.
I found several LED strips (used commonly in kitchen) and LED bulbs coming from China generates strange noise on HF bands. I noticed it when the noise raised up from S3 to S7 on 160m while I was on key. So I immediately went to investigate what was changed at our home and I discovered that XYL switched ON the LED strip installed in kitchen cabinets. The same noise source was the LED bulb in the small bed lamp in the bedroom. After I replaced all of these Chinese crappies with standard lamps the noise gone. (LED strip in kitchen cabinets must be OFF when I am on key, hi) Hope it helps, 73 - Petr, OK1RP On Fri, Oct 14, 2016, at 11:47 AM, Herbert Schoenbohm wrote: > I found a defective LED lamp that sounded. Getting the neighbors to > turn off lamps one by one while you listen in the shack over the phone > might help if they will do that. In my case it had peaks staring in > the AM band and noticeable up to 4 Mhz. Also a bad cell phone charge > adapter power source could be the cause. > > > > On 10/13/2016 1:41 PM, Joe Galicic wrote: > > Boxbe <https://www.boxbe.com/overview> This message is eligible for > > Automatic Cleanup! ([email protected]) Add cleanup rule > > <https://www.boxbe.com/popup?url=https%3A%2F%2Fwww.boxbe.com%2Fcleanup%3Fkey%3D7%252F59dJ6v0jwwslOtBEMkHIItzEsOM6Jf3CC2IdMU8ng%253D%26token%3D1nmKRas9kmwuCwwYRwQOTya04iOoJ5MP%252FuMnYsY2AhRZK33r9nraMnZZVy5MLMzGaQLf%252FG%252FypkMyN%252FA%252B2raVgjgV%252F4BbVroKjod1L6lJN4sDRDGQwTd4MSHtuDu9ZHey%252FubRebXaoJc%253D&tc_serial=27154496124&tc_rand=1244581705&utm_source=stf&utm_medium=email&utm_campaign=ANNO_CLEANUP_ADD&utm_content=001> > > > > | More info > > <http://blog.boxbe.com/general/boxbe-automatic-cleanup?tc_serial=27154496124&tc_rand=1244581705&utm_source=stf&utm_medium=email&utm_campaign=ANNO_CLEANUP_ADD&utm_content=001> > > > > > > > > > > Link to files > > https://www.dropbox.com/sh/3ftcsm50mvr9jmy/AABcDfHjYn-GKvelQhmyJTBia?dl=0 > > > > ----- Original Message ----- > > > > From: "Joe Galicic" <[email protected]> > > To: "PVRC List" <[email protected]>, "TopBand List" > > <[email protected]> > > Sent: Thursday, October 13, 2016 1:35:15 PM > > Subject: Topband: New Noise - 160 Meters > > > > Just put up my 160 antenna and have a new noise source to find. Very loud > > wide band buzzing that starts in the middle of the AM broadcast band and > > then abruptly drops to zero at 1870 KHZ. I have attached sound file and > > panadapter screen shots. It is not coming from my QTH. One night it went > > off at 11PM sharp but has returned and doesn't seem to quit. I will > > continue to monitor for a cycle. I walked the neighborhood with portable AM > > radio and the noise seems to be contained within a four house area. Tough > > to tell which house though. All utilities are buried in my neighborhood. > > Could this be a grow lamp ? Thanks -Joe N3HEE > > _________________ > > Topband Reflector Archives - http://www.contesting.com/_topband > > > > _________________ > > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
