Message-ID: <4E3FC930.1040502@iup.uni-heidelberg.de>
Date: Mon, 08 Aug 2011 13:32:00 +0200
From: =?UTF-8?B?U3RlZmFuIFNjaMOkZmVy?= <schaefer@iup.uni-heidelberg.de>
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To: rsgb_lf_group@blacksheep.org
References: <C7FB1B9647FF46F588D77658283884C7@PcMinto> <410DFBA20276417D9710672E4EDC59FD@PCvanAlbert>
In-Reply-To: <410DFBA20276417D9710672E4EDC59FD@PCvanAlbert>
Subject: Re: LF: Re: Re: CW sked on 137 friday morning?
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Hello Albert,

That's quite good.
Today it is just 50 dB in 1 Hz here. I have extended my wideband screen 
to display DCF39 and HGA22, bottom of 
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_LF_DX_Grabber.html

In my RX there is a band pass filter with unknown attenuation at 138.83 
kHz. I estimate it is 15...20 dB. But it changes when the antenna 
becomes wet :-/ Somehow i think there is a stable and equal distributed 
noise level here in the city that limits the sensitivity. But i've 
learned a bit more in the last weeks and will investigate things further...

73, Stefan/DK7FC

Am 08.08.2011 10:27, schrieb Albert:
> Hi Minto, Roelof, Stefan es others,
> The difference between DCF39 and the noise floor on a quiet day is 92 
> dB in 1 Hz (JO33DE) Antenna "inv L" 18m V and 34m H
> 73, Albert

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Hello Albert,<br>
<br>
That's quite good.<br>
Today it is just 50 dB in 1 Hz here. I have extended my wideband screen
to display DCF39 and HGA22, bottom of
<a class=3D"moz-txt-link-freetext" href=3D"http://www.iup.uni-heidelberg.=
de/schaefer_vlf/DK7FC_LF_DX_Grabber.html">http://www.iup.uni-heidelberg.d=
e/schaefer_vlf/DK7FC_LF_DX_Grabber.html</a><br>
<br>
In my RX there is a band pass filter with unknown attenuation at 138.83
kHz. I estimate it is 15...20 dB. But it changes when the antenna
becomes wet :-/ Somehow i think there is a stable and equal distributed
noise level here in the city that limits the sensitivity. But i've
learned a bit more in the last weeks and will investigate things
further...<br>
<br>
73, Stefan/DK7FC<br>
<br>
Am 08.08.2011 10:27, schrieb Albert:
<blockquote cite=3D"mid:410DFBA20276417D9710672E4EDC59FD@PCvanAlbert"
 type=3D"cite">
  <meta content=3D"text/html; charset=3DUTF-8" http-equiv=3D"Content-Type=
">
  <meta name=3D"GENERATOR" content=3D"MSHTML 9.00.8112.16430">
  <style></style>
  <div><font face=3D"Arial" size=3D"2">Hi Minto, Roelof, Stefan es others=
,</font></div>
  <div>=C2=A0</div>
  <div><font face=3D"Arial" size=3D"2">The difference between DCF39 and t=
he
noise=C2=A0floor on a quiet day is 92 dB</font>=C2=A0<font face=3D"Arial"=
 size=3D"2">in
1 Hz (JO33DE) Antenna "inv L" 18m V and 34m H</font></div>
  <div>=C2=A0</div>
  <div><font face=3D"Arial" size=3D"2">73, Albert</font></div>
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