Hard to see anything and the audio won't play.
Is it anything like this?
https://www.youtube.com/watch?v=11ONE3ZQ3CI
This is what I've been plagued with intermittently.
Thanks,
Ed
WD4ED
-----Original Message-----
From: topband-request@contesting.com
Sent: Friday, October 14, 2016 12:00
To: topband@contesting.com
Subject: Topband Digest, Vol 166, Issue 11
Send Topband mailing list submissions to
topband@contesting.com
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.contesting.com/mailman/listinfo/topband
or, via email, send a message with subject or body 'help' to
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You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Topband digest..."
Today's Topics:
1. New Noise - 160 Meters (Joe Galicic)
2. Re: New Noise - 160 Meters (Joe Galicic)
3. Re: Soldering radials? (Rob Atkinson)
4. BOGs in alley under powerlines (HankP)
5. Re: BOGs in alley under powerlines (Mike Waters)
6. Re: BOGs in alley under powerlines (Lloyd - N9LB)
7. Re: BOGs in alley under powerlines (Chet Moore)
8. Re: BOGs in alley under powerlines (Bob K6UJ)
9. Re: BOGs in alley under powerlines (Mike Waters)
10. Re: New Noise - 160 Meters (Herbert Schoenbohm)
11. Re: New Noise - 160 Meters (Petr Ourednik)
12. Re: New Noise - 160 Meters (David Cutter)
----------------------------------------------------------------------
Message: 1
Date: Thu, 13 Oct 2016 17:35:15 +0000 (UTC)
From: Joe Galicic <galicic@comcast.net>
To: "List, PVRC" <pvrc@mailman.qth.net>, TopBand List
<topband@contesting.com>
Subject: Topband: New Noise - 160 Meters
Message-ID:
<1939490456.33532516.1476380115662.JavaMail.zimbra@comcast.net>
Content-Type: text/plain; charset=utf-8
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
------------------------------
Message: 2
Date: Thu, 13 Oct 2016 17:41:38 +0000 (UTC)
From: Joe Galicic <galicic@comcast.net>
To: "List, PVRC" <pvrc@mailman.qth.net>, "List, TopBand"
<topband@contesting.com>
Subject: Re: Topband: New Noise - 160 Meters
Message-ID:
<703178247.33537374.1476380498897.JavaMail.zimbra@comcast.net>
Content-Type: text/plain; charset=utf-8
Link to files
https://www.dropbox.com/sh/3ftcsm50mvr9jmy/AABcDfHjYn-GKvelQhmyJTBia?dl=0
----- Original Message -----
From: "Joe Galicic" <galicic@comcast.net>
To: "PVRC List" <pvrc@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
------------------------------
Message: 3
Date: Thu, 13 Oct 2016 13:51:23 -0500
From: Rob Atkinson <ranchorobbo@gmail.com>
To: Tim Shoppa <tshoppa@gmail.com>
Cc: Jorge Diez - CX6VM <cx6vm.jorge@gmail.com>,
"topband@contesting.com" <topband@contesting.com>
Subject: Re: Topband: Soldering radials?
Message-ID:
<CALWD7Z4A-pxz0oKEQiva9KSLBPfNmCvKxg_nwF6_YKd4PyEwvw@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
My experience has been the complete opposite. May have to do with
which is hard drawn and which is soft.
Rob
K5UJ
On Thu, Oct 13, 2016 at 10:59 AM, Tim Shoppa <tshoppa@gmail.com> wrote:
I much prefer stranded 18AWG for my "roll out on top of lawn and driveway"
radials. Stranded is more likely to stay flat on the ground than solid.
The
solid likes to remembers the curl of being wound on the spool and sproings
up. It takes many fewer staples to hold the stranded down.
------------------------------
Message: 4
Date: Thu, 13 Oct 2016 15:51:29 -0400 (EDT)
From: HankP <pfizenmayer@q.com>
To: topband@contesting.com
Subject: Topband: BOGs in alley under powerlines
Message-ID:
<958459995.2914558.1476388289274.JavaMail.root@md04.quartz.synacor.com>
Content-Type: text/plain; charset=utf-8
Is there any point in trying a 160 foot or so BOG down an alley if there are
powerlines and phone lines and cable TV 15 to 30 feet above ??? (Along with
Centurylink VDSL2 carriers across band 2 to 3 dB above my -100 dBm invvee
noise. - at least they are not -75 dBm anymore after two days and two people
and 75 days of hassle )
Probably not but maybe I am missing something - alley runs east - west .
Anybody ever tried this ?
Hank K7HP
------------------------------
Message: 5
Date: Thu, 13 Oct 2016 14:57:24 -0500
From: Mike Waters <mikewate@gmail.com>
To: HankP <pfizenmayer@q.com>
Cc: topband <topband@contesting.com>
Subject: Re: Topband: BOGs in alley under powerlines
Message-ID:
<CA+FxYXhaWWpEjGseQRKY1+uVGD4fZEym-kKyCQzgfXP63H8E-Q@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
It can't cost much to try it! :-)
73, Mike
www.w0btu.com
------------------------------
Message: 6
Date: Thu, 13 Oct 2016 14:59:11 -0500
From: "Lloyd - N9LB" <lloydberg@charter.net>
To: <topband@contesting.com>
Subject: Re: Topband: BOGs in alley under powerlines
Message-ID: <000401d2258c$44003880$cc00a980$@charter.net>
Content-Type: text/plain; charset="us-ascii"
Assuming the utilities are all in the back yards, I'd suggest you look at
running a BOG wire along the edge of the sidewalk in the front yards.
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of HankP
Sent: Thursday, October 13, 2016 2:51 PM
To: topband@contesting.com
Subject: Topband: BOGs in alley under powerlines
Is there any point in trying a 160 foot or so BOG down an alley if there are
powerlines and phone lines and cable TV 15 to 30 feet above ??? (Along with
Centurylink VDSL2 carriers across band 2 to 3 dB above my -100 dBm invvee
noise. - at least they are not -75 dBm anymore after two days and two people
and 75 days of hassle )
Probably not but maybe I am missing something - alley runs east - west .
Anybody ever tried this ?
Hank K7HP
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
------------------------------
Message: 7
Date: Thu, 13 Oct 2016 17:34:19 -0400
From: "Chet Moore" <Chetmoore@cox.net>
To: <topband@contesting.com>
Subject: Re: Topband: BOGs in alley under powerlines
Message-ID: <006a01d22599$8e7c23d0$ab746b70$@net>
Content-Type: text/plain; charset="us-ascii"
Hi Hank,
what i do here is pretty much what you want to do. I run mine down the
gutter from my house about 300 feet laying the wire in the gutter. I have
the wire on an electrical cord reel. It crosses the driveways of 3
neighbors. I reel it out after dark and reel it back up when done. yes,
cars do and have backed over it and never knew it. to keep the wire in the
gutter, I take my sunday (thickest day of the week) newspapers, put them
back in the plastic protective bags, fill the bag with water which is soaked
up by the newspapers, tie the end of the bag with a bag tie to keep any
water in and lay the soggy newspaper in the gutter, one on each side of the
driveway to keep the wire low to the ground so it does not snag the
undercarriage of any car coming into or out of their driveway. A rock or
brick or other type of weighting would likely tip off the owner of the
house. If and When they see a newspaper sort of laying in the gutter, they
just assume that the paper boy missed his target, the insulated wire is only
out after dark and my wire is very dark green, almost black and you really
can't see the wire at night, even the one house closest to the streetlight.
it has worked for about 7 years without anyone noticing. Technically believe
I am laying the wire on city property and not on someones personal property.
No I have not actually researched to see if the homeowner owns any part of
the gutter. Each night when done, I roll up the wire and then pick up the
newspapers. This is not a particularly busy street. I have about 180
countries on 160. unfortunately, I can only do this aiming 75 degrees or so
due to privacy fences going in other directions. I have never heard a JA or
KL7 on 160, even though I hear other nearby stations here working KL7 in the
CQ and arrl DX contests. In the cq and arrl 160 tests I click on every
pacific spot but so far no joy. there is a house 80 feet behind me so I am
deaf to the west. the power lines are on poles 30 feet above the gutter
directly above the bog. I shunt feed my 95 foot tower which has about 90
radials.
I have used the bog in the gutter both terminated and unterminated and see
not any difference. the gutters are cement, the road surface is asphalt so
the bog is laying on the cement for the whole run.I don't remember the full
call but there is I think a W7/K7 (k7ca/ce ??), possibly portable CE3 in
chile who runs low power. to work him I ran out the bog to the south intead
of 70 degrees. He was 539 on the bog and I could just barely tell he was
there listening on the shunt fed tower.Laying my BOG in the back yard away
from the power lines is not an option. my bog is a just about twice as long
as yours is projected to be but it will cost you practically nothing to put
the bog out and in your case it looks like it can be left in place. The
price is right, so I'd say.........Go for it !
73
Chet N4FX
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Lloyd -
N9LB
Sent: Thursday, October 13, 2016 3:59 PM
To: topband@contesting.com
Subject: Re: Topband: BOGs in alley under powerlines
Assuming the utilities are all in the back yards, I'd suggest you look at
running a BOG wire along the edge of the sidewalk in the front yards.
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of HankP
Sent: Thursday, October 13, 2016 2:51 PM
To: topband@contesting.com
Subject: Topband: BOGs in alley under powerlines
Is there any point in trying a 160 foot or so BOG down an alley if there are
powerlines and phone lines and cable TV 15 to 30 feet above ??? (Along with
Centurylink VDSL2 carriers across band 2 to 3 dB above my -100 dBm invvee
noise. - at least they are not -75 dBm anymore after two days and two people
and 75 days of hassle )
Probably not but maybe I am missing something - alley runs east - west .
Anybody ever tried this ?
Hank K7HP
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
------------------------------
Message: 8
Date: Thu, 13 Oct 2016 15:24:33 -0700
From: Bob K6UJ <k6uj@pacbell.net>
To: topband@contesting.com
Subject: Re: Topband: BOGs in alley under powerlines
Message-ID: <4af1243c-1eb0-a075-3743-2a592674141b@pacbell.net>
Content-Type: text/plain; charset=windows-1252; format=flowed
Chet,
That sounds interesting. I may try it myself. In my situation, I live
on a corner
and could only run the bog out in the west direction which might be good
for europe
which is NW of me. It depends how directional it is on receive. What
kind of directivity
have you noticed on receiving with your BOG ?
Bob
K6UJ
On 10/13/16 2:34 PM, Chet Moore wrote:
Hi Hank,
what i do here is pretty much what you want to do. I run mine down the
gutter from my house about 300 feet laying the wire in the gutter. I have
the wire on an electrical cord reel. It crosses the driveways of 3
neighbors. I reel it out after dark and reel it back up when done. yes,
cars do and have backed over it and never knew it. to keep the wire in the
gutter, I take my sunday (thickest day of the week) newspapers, put them
back in the plastic protective bags, fill the bag with water which is
soaked
up by the newspapers, tie the end of the bag with a bag tie to keep any
water in and lay the soggy newspaper in the gutter, one on each side of
the
driveway to keep the wire low to the ground so it does not snag the
undercarriage of any car coming into or out of their driveway. A rock or
brick or other type of weighting would likely tip off the owner of the
house. If and When they see a newspaper sort of laying in the gutter, they
just assume that the paper boy missed his target, the insulated wire is
only
out after dark and my wire is very dark green, almost black and you really
can't see the wire at night, even the one house closest to the
streetlight.
it has worked for about 7 years without anyone noticing. Technically
believe
I am laying the wire on city property and not on someones personal
property.
No I have not actually researched to see if the homeowner owns any part
of
the gutter. Each night when done, I roll up the wire and then pick up the
newspapers. This is not a particularly busy street. I have about 180
countries on 160. unfortunately, I can only do this aiming 75 degrees or
so
due to privacy fences going in other directions. I have never heard a JA
or
KL7 on 160, even though I hear other nearby stations here working KL7 in
the
CQ and arrl DX contests. In the cq and arrl 160 tests I click on every
pacific spot but so far no joy. there is a house 80 feet behind me so I am
deaf to the west. the power lines are on poles 30 feet above the gutter
directly above the bog. I shunt feed my 95 foot tower which has about 90
radials.
I have used the bog in the gutter both terminated and unterminated and see
not any difference. the gutters are cement, the road surface is asphalt so
the bog is laying on the cement for the whole run.I don't remember the
full
call but there is I think a W7/K7 (k7ca/ce ??), possibly portable CE3 in
chile who runs low power. to work him I ran out the bog to the south
intead
of 70 degrees. He was 539 on the bog and I could just barely tell he was
there listening on the shunt fed tower.Laying my BOG in the back yard away
from the power lines is not an option. my bog is a just about twice as
long
as yours is projected to be but it will cost you practically nothing to
put
the bog out and in your case it looks like it can be left in place. The
price is right, so I'd say.........Go for it !
73
Chet N4FX
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Lloyd -
N9LB
Sent: Thursday, October 13, 2016 3:59 PM
To: topband@contesting.com
Subject: Re: Topband: BOGs in alley under powerlines
Assuming the utilities are all in the back yards, I'd suggest you look at
running a BOG wire along the edge of the sidewalk in the front yards.
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of HankP
Sent: Thursday, October 13, 2016 2:51 PM
To: topband@contesting.com
Subject: Topband: BOGs in alley under powerlines
Is there any point in trying a 160 foot or so BOG down an alley if there
are
powerlines and phone lines and cable TV 15 to 30 feet above ??? (Along
with
Centurylink VDSL2 carriers across band 2 to 3 dB above my -100 dBm invvee
noise. - at least they are not -75 dBm anymore after two days and two
people
and 75 days of hassle )
Probably not but maybe I am missing something - alley runs east - west .
Anybody ever tried this ?
Hank K7HP
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
------------------------------
Message: 9
Date: Thu, 13 Oct 2016 18:11:58 -0500
From: Mike Waters <mikewate@gmail.com>
To: topband <topband@contesting.com>
Subject: Re: Topband: BOGs in alley under powerlines
Message-ID:
<CA+FxYXiMgXAcx1d5Fsk2-gSBuHg6ox9r4fa6J5CimhJ-WQc-AQ@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Keep in mind that a BOG antenna really needs some kind of return (RF
ground). That could be a few radials buried just below the surface of the
earth (to minimize pickup from unwanted directions on the radials
themselves). Otherwise, the return is in the form of common-mode on the
outside of your coax's shield.
If it's not terminated, then a ground at the far end could be dispensed
with.
BOGs and associated grounds have been discussed at length here. I suggest
you search back through the Topband archives. Lots of good advice there!
Pay particular attention to threads containing Guy Olinger's posts on this
subject. (Darned if I can remember Guy's callsign!)
73, Mike
www.w0btu.com
------------------------------
Message: 10
Date: Fri, 14 Oct 2016 05:47:51 -0400
From: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
To: topband@contesting.com
Subject: Re: Topband: New Noise - 160 Meters
Message-ID: <9c2075e3-5eea-7ddf-36d3-700423da856f@gmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
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! (galicic@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>
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Link to files
https://www.dropbox.com/sh/3ftcsm50mvr9jmy/AABcDfHjYn-GKvelQhmyJTBia?dl=0
----- Original Message -----
From: "Joe Galicic" <galicic@comcast.net>
To: "PVRC List" <pvrc@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
------------------------------
Message: 11
Date: Fri, 14 Oct 2016 15:41:18 +0200
From: Petr Ourednik <indians@xsmail.com>
To: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>,
topband@contesting.com
Subject: Re: Topband: New Noise - 160 Meters
Message-ID:
<1476452478.120651.755928161.7AC3A18E@webmail.messagingengine.com>
Content-Type: text/plain
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! (galicic@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" <galicic@comcast.net>
> To: "PVRC List" <pvrc@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
------------------------------
Message: 12
Date: Fri, 14 Oct 2016 15:30:39 +0100
From: "David Cutter" <d.cutter@ntlworld.com>
To: "Petr Ourednik" <indians@xsmail.com>, "Herbert Schoenbohm"
<herbert.schoenbohm@gmail.com>, <topband@contesting.com>
Subject: Re: Topband: New Noise - 160 Meters
Message-ID: <2ECC657A7670409FA767D58A8E6D81E0@DavidPC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Petr
That's very interesting.
I have heard that long led strips eg in the kitchen are powered from a noisy
smpsu: the long cable is the antenna. A linear supply should stop that
noise or small ferrite toroids (it's very low current). I have just
purchased some from IKEA and will be testing them soon.
David
G3UNA
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
------------------------------
Subject: Digest Footer
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End of Topband Digest, Vol 166, Issue 11
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