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Message-ID: <278359.38612.qm@web28107.mail.ukl.yahoo.com>
Date: Mon, 12 Oct 2009 15:54:46 -0700 (PDT)
From: M0FMT <m0fmt@yahoo.co.uk>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <1255365325.4ad35acd6c922@imp.netikka.net>
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Subject: Re: LF: ADSL noise Q for petefmt
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Hi Paul-Henrik and Graham
=A0
Yes very depressing for us with the potentilal problems=A0from "new techno=
logy".=20
I have to do as Graham says find a quiet spot and exploit that if=A0I can=
 find one.
=A0
Well it looks like conditions are on the up for the winter season so may=
 be it will help get better signals from each other. If I make any great=
 breakthroughs with my noise issue rest assured =A0I will broadcast it.
=A0
In the meantime thanks for your interest and info.
=A0
BTW I intend to try some late night QRSS from a qrp 137kc/s TX when our po=
stal service starts to play the game again. I have a 137.77 xtal stuck=A0i=
n the post right now..
=A0
73 all petefmt

--- On Mon, 12/10/09, Paul-Henrik <phl@netikka.fi> wrote:


From: Paul-Henrik <phl@netikka.fi>
Subject: LF: ADSL noise Q for petefmt
To: rsgb_lf_group@blacksheep.org
Date: Monday, 12 October, 2009, 5:35 PM


Hello Pete, LF

> Well I can only conclude it is ADSL because it is
> just raising the noise floor it is=A0very subtle not really identifiable=
 like
> say TV LTB, it's a mush. Frame ants help a bit but not as sensitive at=
 the LW
> by a mile.

> 73 petefmt

I'm also plagued by a "not really identifiable" mush-like noisefloor. In=
 my case
it is not affecting RX on 500kHz badly, at least I seem to hear you guys=
 pretty
well and daytime the band sounds pretty fine. Here the problems start in=
 the
high end of the MW BC band and extends up to about 2600kHz with a constant
level. Above 2600kHz it slowly drops off and at 3000kHz it is more or less
gone.

The noise has no real characteristic, it is like a constant 24/7/365 white=
 noise
(S7 on IC-718 with inverted-L antenna) and I can not D/F it on any of my=
 loops.

I have even disconnected all incoming mains and phone lines to the house=
 just
above earth level and ran the radio from a battery but it is still there..=
.

I have tried to nail this pest many times but always failed so far. A clue=
 to
what kind of technology that could cause white noise in this spectrum woul=
d be
very helpful in the battle.

Thankful for any hints.


Then a word of warning as this may soon affect many of us:

On top of this the local electric company recently installed smart billing
meters in our area running LonTalk over 4800baud FSK PLC on 66.7kHz. The=
 2'nd
harmonic sidebands of this EU approved complete engineering failure piece=
 of
crap technology are now wiping out 136kHz completely daytime... With night=
time
QRN it just about "blends in" when using a 250Hz CW filter. The signal is=
 all
over in every cm of mains wiring indoors too. At least I know my enemy in=
 this
case but being approved technology used for every household means there is=
 very
little to do but live with it.

73

Paul-Henrik / OH1LSQ









     =20

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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D=
"top" style=3D"font: inherit;"><DIV>Hi Paul-Henrik and Graham</DIV>
<DIV>&nbsp;</DIV>
<DIV>Yes very depressing for us with the potentilal problems&nbsp;from "ne=
w technology". </DIV>
<DIV>I have to do as Graham says find a quiet spot and exploit that if&nbs=
p;I can find one.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Well it looks like conditions are on the up for the winter season so=
 may be it will help get better signals from each other. If I make any gre=
at breakthroughs with my noise issue rest assured &nbsp;I will broadcast=
 it.</DIV>
<DIV>&nbsp;</DIV>
<DIV>In the meantime thanks for your interest and info.</DIV>
<DIV>&nbsp;</DIV>
<DIV>BTW I intend to try some late night QRSS from a qrp 137kc/s TX when=
 our postal service starts to play the game again. I have a 137.77 xtal st=
uck&nbsp;in the post right now..</DIV>
<DIV>&nbsp;</DIV>
<DIV>73 all petefmt<BR><BR>--- On <B>Mon, 12/10/09, Paul-Henrik <I>&lt;phl=
@netikka.fi&gt;</I></B> wrote:<BR></DIV>
<BLOCKQUOTE style=3D"BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT:=
 5px; MARGIN-LEFT: 5px"><BR>From: Paul-Henrik &lt;phl@netikka.fi&gt;<BR>Su=
bject: LF: ADSL noise Q for petefmt<BR>To: rsgb_lf_group@blacksheep.org<BR=
>Date: Monday, 12 October, 2009, 5:35 PM<BR><BR>
<DIV class=3DplainMail>Hello Pete, LF<BR><BR>&gt; Well I can only conclude=
 it is ADSL because it is<BR>&gt; just raising the noise floor it is&nbsp;=
very subtle not really identifiable like<BR>&gt; say TV LTB, it's a mush.=
 Frame ants help a bit but not as sensitive at the LW<BR>&gt; by a mile.<B=
R><BR>&gt; 73 petefmt<BR><BR>I'm also plagued by a "not really identifiabl=
e" mush-like noisefloor. In my case<BR>it is not affecting RX on 500kHz ba=
dly, at least I seem to hear you guys pretty<BR>well and daytime the band=
 sounds pretty fine. Here the problems start in the<BR>high end of the MW=
 BC band and extends up to about 2600kHz with a constant<BR>level. Above=
 2600kHz it slowly drops off and at 3000kHz it is more or less<BR>gone.<BR=
><BR>The noise has no real characteristic, it is like a constant 24/7/365=
 white noise<BR>(S7 on IC-718 with inverted-L antenna) and I can not D/F=
 it on any of my loops.<BR><BR>I have even disconnected all incoming mains=
 and phone lines
 to the house just<BR>above earth level and ran the radio from a battery=
 but it is still there...<BR><BR>I have tried to nail this pest many times=
 but always failed so far. A clue to<BR>what kind of technology that could=
 cause white noise in this spectrum would be<BR>very helpful in the battle=
.<BR><BR>Thankful for any hints.<BR><BR><BR>Then a word of warning as this=
 may soon affect many of us:<BR><BR>On top of this the local electric comp=
any recently installed smart billing<BR>meters in our area running LonTalk=
 over 4800baud FSK PLC on 66.7kHz. The 2'nd<BR>harmonic sidebands of this=
 EU approved complete engineering failure piece of<BR>crap technology are=
 now wiping out 136kHz completely daytime... With nighttime<BR>QRN it just=
 about "blends in" when using a 250Hz CW filter. The signal is all<BR>over=
 in every cm of mains wiring indoors too. At least I know my enemy in this=
<BR>case but being approved technology used for every household means ther=
e is
 very<BR>little to do but live with it.<BR><BR>73<BR><BR>Paul-Henrik / OH1=
LSQ<BR><BR><BR><BR><BR><BR><BR></DIV></BLOCKQUOTE></td></tr></table><br>



     =20

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