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Date: Thu, 17 Dec 2009 17:03:32 +0100
From: "John RABSON" <john.rabson@numeo.fr>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Broadcast audio splatter on 136kHz
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I have been hearing this during the paast week, both after dark and in day=
light.  It coincides with a strong signal here from Lakihegy, but I do not=
 say the Hungarian transmission causes it.

John Rabson=20
F5VLF
58800 Cervon
France
JN17vg

*********** REPLY SEPARATOR  ***********

On 07/12/2009 at 18:16 Paul-Henrik wrote:

>LF
>
>Does anybody else on the reflector suffer from BC-splatter on 136kHz? It
>has
>been a regular occurance here lately after dark. After some identificatio=
n
>work
>I have a match on the running programmes on 171 and 225kHz, 225kHz being
>the
>stronger.
>
>I blamed my RX chain at first and started to eliminate IMD possibilities
>but
>even now using a passive antenna and a very sharp bandpass filter (much
>like an
>IF-filter for a valve BC-set) I still have the BC splatter.
>
>So far I have not been able to determine the carrier frequency of this
>"phantom
>station" but it must be close to the carrier of Lakihegy. Using AM
>detection
>with a narrow filter it seems centered around 135.4kHz. Sounds like two
>BC-stations on top of eachother and the USB reaches up in the amateur ban=
d
>making "ghost whispers".
>
>Luxembourg effect, transmitter IMD or just me missing the point? The
>bandpass
>filter is very effective and there are only weak traces of signals above
>150kHz.
>
>
>BR
>
>Paul-Henrik, OH1LSQ