Topband: Topband Digest, Vol 166, Issue 11
Edward S. Clark IV
edclarkiv1 at verizon.net
Fri Oct 14 18:34:26 EDT 2016
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 at contesting.com
Sent: Friday, October 14, 2016 12:00
To: topband at contesting.com
Subject: Topband Digest, Vol 166, Issue 11
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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 at comcast.net>
To: "List, PVRC" <pvrc at mailman.qth.net>, TopBand List
<topband at contesting.com>
Subject: Topband: New Noise - 160 Meters
Message-ID:
<1939490456.33532516.1476380115662.JavaMail.zimbra at 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 at comcast.net>
To: "List, PVRC" <pvrc at mailman.qth.net>, "List, TopBand"
<topband at contesting.com>
Subject: Re: Topband: New Noise - 160 Meters
Message-ID:
<703178247.33537374.1476380498897.JavaMail.zimbra at 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 at comcast.net>
To: "PVRC List" <pvrc at mailman.qth.net>, "TopBand List"
<topband at 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 at gmail.com>
To: Tim Shoppa <tshoppa at gmail.com>
Cc: Jorge Diez - CX6VM <cx6vm.jorge at gmail.com>,
"topband at contesting.com" <topband at contesting.com>
Subject: Re: Topband: Soldering radials?
Message-ID:
<CALWD7Z4A-pxz0oKEQiva9KSLBPfNmCvKxg_nwF6_YKd4PyEwvw at 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 at 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 at q.com>
To: topband at contesting.com
Subject: Topband: BOGs in alley under powerlines
Message-ID:
<958459995.2914558.1476388289274.JavaMail.root at 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 at gmail.com>
To: HankP <pfizenmayer at q.com>
Cc: topband <topband at contesting.com>
Subject: Re: Topband: BOGs in alley under powerlines
Message-ID:
<CA+FxYXhaWWpEjGseQRKY1+uVGD4fZEym-kKyCQzgfXP63H8E-Q at 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 at charter.net>
To: <topband at 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 at contesting.com] On Behalf Of HankP
Sent: Thursday, October 13, 2016 2:51 PM
To: topband at 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 at cox.net>
To: <topband at 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 at contesting.com] On Behalf Of Lloyd -
N9LB
Sent: Thursday, October 13, 2016 3:59 PM
To: topband at 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 at contesting.com] On Behalf Of HankP
Sent: Thursday, October 13, 2016 2:51 PM
To: topband at 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 at pacbell.net>
To: topband at contesting.com
Subject: Re: Topband: BOGs in alley under powerlines
Message-ID: <4af1243c-1eb0-a075-3743-2a592674141b at 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 at contesting.com] On Behalf Of Lloyd -
> N9LB
> Sent: Thursday, October 13, 2016 3:59 PM
> To: topband at 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 at contesting.com] On Behalf Of HankP
> Sent: Thursday, October 13, 2016 2:51 PM
> To: topband at 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 at gmail.com>
To: topband <topband at contesting.com>
Subject: Re: Topband: BOGs in alley under powerlines
Message-ID:
<CA+FxYXiMgXAcx1d5Fsk2-gSBuHg6ox9r4fa6J5CimhJ-WQc-AQ at 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 at gmail.com>
To: topband at contesting.com
Subject: Re: Topband: New Noise - 160 Meters
Message-ID: <9c2075e3-5eea-7ddf-36d3-700423da856f at 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 at 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 at comcast.net>
> To: "PVRC List" <pvrc at mailman.qth.net>, "TopBand List"
> <topband at 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 at xsmail.com>
To: Herbert Schoenbohm <herbert.schoenbohm at gmail.com>,
topband at contesting.com
Subject: Re: Topband: New Noise - 160 Meters
Message-ID:
<1476452478.120651.755928161.7AC3A18E at 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 at 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 at comcast.net>
> > To: "PVRC List" <pvrc at mailman.qth.net>, "TopBand List"
> > <topband at 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 at ntlworld.com>
To: "Petr Ourednik" <indians at xsmail.com>, "Herbert Schoenbohm"
<herbert.schoenbohm at gmail.com>, <topband at contesting.com>
Subject: Re: Topband: New Noise - 160 Meters
Message-ID: <2ECC657A7670409FA767D58A8E6D81E0 at 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
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