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! (gali...@comcast.net) 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" <gali...@comcast.net>
> > To: "PVRC List" <p...@mailman.qth.net>, "TopBand List" 
> > <topband@contesting.com>
> > 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

Reply via email to