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From: Laurence KL7 L <hellozerohellozero@hotmail.com>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Date: Thu, 3 Oct 2013 12:31:32 -0800
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Subject: RE: LF: No TA on MF :-(
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Roelof -  I can confirm its like adding a 50dB attenuator to HF and long ra=
nge MF/LF signals here. Very fast onset and slooooooooowwwwwer recovery- th=
ats typically from just outside of the Auroral Oval (depending on how South=
 its moved) but inside the Oval  say at 83N its like being in a partially m=
irrored fish bowl with a large diode effect. You can often still hear DX MF=
 and LF signals at very very low levels but (mostly) the noise levels are r=
eally low - so low Ive taken front ends apart to find the problem.=20
=20
Laurence KL7 L
=20

=20
> To: rsgb_lf_group@blacksheep.org
> Date: Thu=2C 3 Oct 2013 20:00:51 +0200
> From: roelof@ndb.demon.nl
> Subject: Re: LF: No TA on MF :-(
>=20
> Hello Stefan=2C
>=20
> I study propagation of Canadian NDB's in the range 200 - 520 kHz by means=
 =20
> of a PERSEUS spectrum recoding from 200 - 600 kHz. This recording runs =20
> every night.
 		 	   		  =

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<body class=3D'hmmessage'><div dir=3D'ltr'>Roelof -&nbsp=3B I can confirm i=
ts like adding a 50dB attenuator to HF and long range MF/LF signals here. V=
ery fast onset&nbsp=3Band slooooooooowwwwwer recovery- thats typically from=
 just outside of the Auroral Oval (depending on how South its moved) but in=
side the Oval &nbsp=3Bsay at 83N its like being in a partially&nbsp=3Bmirro=
red&nbsp=3Bfish bowl with a large diode effect. You can often still hear DX=
 MF and LF signals at very very low levels but (mostly) the noise levels ar=
e really low - so low Ive taken front ends apart to find the problem. <BR>&=
nbsp=3B<BR>Laurence KL7 L<BR>&nbsp=3B<BR><br>&nbsp=3B<BR><div>&gt=3B To: rs=
gb_lf_group@blacksheep.org<br>&gt=3B Date: Thu=2C 3 Oct 2013 20:00:51 +0200=
<br>&gt=3B From: roelof@ndb.demon.nl<br>&gt=3B Subject: Re: LF: No TA on MF=
 :-(<br>&gt=3B <br>&gt=3B Hello Stefan=2C<br>&gt=3B <br>&gt=3B I study prop=
agation of Canadian NDB's in the range 200 - 520 kHz by means  <br>&gt=3B o=
f a PERSEUS spectrum recoding from 200 - 600 kHz. This recording runs  <br>=
&gt=3B every night.<br></div> 		 	   		  </div></body>
</html>=

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