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Date: Fri, 03 Jan 2014 14:30:43 +0100
From: uwe-jannsen@kabelmail.de
To: rsgb_lf_group@blacksheep.org
Message-ID: <f1357de4a4ee45568ddb7ecc5fac734f@kabelmail.de>
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Subject: LF: 8270Hz
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OK=2E OK=2E dreamers, the TX is on the air since 1309UTC=2E=20
 QRG: 8270=2E000Hz=2E
 WX: continuous rain but not so strong=2E
 when ever the order comes, I can switch to Op-4H=2E
 GL
 Uwe/dj8wx
  Von: rsgb_lf_group@blacksheep=2Eorg
 Gesendet: 03=2E01=2E2014 13:21
 An: rsgb_lf_group@blacksheep=2Eorg
 Kopie: paul@abelian=2Enetcom=2Eco=2Euk
 Betreff: Fw: VLF: 8=2E275 kHz

Paul Nicholson put forth the important argument that we'd better stay a=
way from 8280 because it's a multiple of 60 Hz=2E=A0Mains harmonics ten=
d to drift a bit with the line frequeny so further away is better=2E =20

Thus I retract my preposition, and suggest instead to stay with the ori=
ginal 8270 Hz=2E=20

Uwe, go ahead! =20

Best 73,=20

Markus=20

PS Direct harmonics from 16=2E67 Hz are relatively weak here, even thou=
gh the railway is only 400 m away=2E It looks more=A0like=A0carriers fr=
om=A0switchmode power conversion=A0units (eg near 8 kHz), accompanied=A0=
by=A0the telltale 33 Hz spaced sidebands=2E Unfortunately these frequen=
cies are not easily predictable=2E=20

From: Paul =20

Sent: Friday, January 03, 2014 12:56 PM=20

To: Markus Vester =20

Subject: Re: VLF: 8=2E275 kHz  =20

 8970 is well placed with respect to harmonics of
 both 50 and 60Hz=2E

 8270/8275 not so good in a 60Hz region=2E

 8124 to 8126 would be a good range, considering
 harmonics of 16=2E67Hz, 50Hz, and 60Hz=2E

 Let me know what is decided, I will switch my spectrogram
 over to the new band=2E

 --
 Paul Nicholson
 --
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<div style=3D"margin: 5px;padding:0;font-family: Arial; font-size: 13px=
;">OK=2E OK=2E dreamers, the TX is on the air since 1309UTC=2E <br />
QRG: 8270=2E000Hz=2E<br />
WX: continuous rain but not so strong=2E<br />
when ever the order comes, I can switch to Op-4H=2E<br />
GL<br />
Uwe/dj8wx<br />
<hr />
Von: rsgb_lf_group@blacksheep=2Eorg<br />
Gesendet: 03=2E01=2E2014 13:21<br />
An: rsgb_lf_group@blacksheep=2Eorg<br />
Kopie: paul@abelian=2Enetcom=2Eco=2Euk<br />
Betreff: Fw: VLF: 8=2E275 kHz<br />
<hr />
<br />
<div><span style=3D"font-family: arial; font-size: 13px;">Paul Nicholso=
n put forth the important argument
that we'd better stay away from 8280 because it's a multiple of 60
Hz=2E&nbsp;Mains harmonics tend to drift a bit with the line frequeny s=
o further
away is better=2E </span></div>
<div><span style=3D"font-family: arial; font-size: 13px;"></span>&nbsp;=
</div>
<div><span style=3D"font-family: arial; font-size: 13px;">
<div><span style=3D"font-family: arial; font-size: 13px;">Thus I retrac=
t my preposition, and suggest instead
to stay with the original <strong>8270 Hz</strong>=2E</span></div>
<div><span style=3D"font-family: arial; font-size: 13px;"></span>&nbsp;=
</div>
<div><span style=3D"font-family: arial; font-size: 13px;">Uwe, go ahead=
!</span></div>
</span></div>
<div><span style=3D"font-family: arial; font-size: 13px;"></span>&nbsp;=
</div>
<div><span style=3D"font-family: arial; font-size: 13px;">Best 73,</spa=
n></div>
<div><span style=3D"font-family: arial; font-size: 13px;">Markus</span>=
</div>
<div><span style=3D"font-family: arial; font-size: 13px;"></span>&nbsp;=
</div>
<div><span style=3D"font-family: arial; font-size: 13px;">PS Direct har=
monics from 16=2E67 Hz are relatively
weak here, even though the railway is only 400 m away=2E It looks
more&nbsp;like&nbsp;carriers from&nbsp;switchmode power conversion&nbsp=
;units
(eg near 8 kHz), accompanied&nbsp;by&nbsp;the telltale 33 Hz spaced sid=
ebands=2E
Unfortunately these frequencies are not easily predictable=2E
<div>&nbsp;</div>
</span></div>
<div style=3D"font: 10pt tahoma;">
<div><span style=3D"font-family: arial;"></span><span style=3D"font-fam=
ily: arial;"></span><span style=3D"font-family: arial;"></span><br />
</div>
<div style=3D"background: none repeat scroll 0% 0% #f5f5f5;">
<div><strong>From:</strong> <a href=3D"mailto:Paul@abelian=2Enetcom=2Ec=
o=2Euk" title=3D"Paul@abelian=2Enetcom=2Eco=2Euk">Paul</a> </div>
<div><strong>Sent:</strong> Friday, January 03, 2014 12:56 PM</div>
<div><strong>To:</strong> <a href=3D"mailto:markusvester@aol=2Ecom" tit=
le=3D"markusvester@aol=2Ecom">Markus Vester</a> </div>
<div><strong>Subject:</strong> Re: VLF: 8=2E275 kHz</div>
</div>
</div>
<div><br />
</div>
<br />
8970 is well placed with respect to harmonics of<br />
both 50
and 60Hz=2E<br />
<br />
8270/8275 not so good in a 60Hz region=2E<br />
<br />
8124 to 8126
would be a good range, considering<br />
harmonics of 16=2E67Hz, 50Hz, and
60Hz=2E<br />
<br />
Let me know what is decided, I will switch my spectrogram<br />
over
to the new band=2E<br />
<br />
--<br />
Paul Nicholson<br />
--</div>
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