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Message-ID: <838615.17231.qm@web86501.mail.ird.yahoo.com>
Date: Mon, 7 Dec 2009 20:21:18 +0000 (GMT)
From: ALAN MELIA <alan.melia@btinternet.com>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <1260202597.4b1d2a65f3b5c@imp.netikka.net>
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Subject: Re: LF: Broadcast audio splatter on 136kHz
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Hi Paul-Henrik, You could be right about it being ICM (or "luxembourg effe=
ct" on Lakihegy. If so you should hear or see the "telegrams that Lakihegy=
 sends on the "splatter as well. If it is ICM (Ionosphereic Cross Modulati=
on) then the BC "victim" is probably on approximately the same bearing as=
 Lakihegy and not more than 20 30 degrees off line. It is possible that ot=
her in differenct areas may hear a different BC station
Best Wishes
Alan G3NYK

--- On Mon, 7/12/09, Paul-Henrik <phl@netikka.fi> wrote:

> From: Paul-Henrik <phl@netikka.fi>
> Subject: LF: Broadcast audio splatter on 136kHz
> To: rsgb_lf_group@blacksheep.org
> Date: Monday, 7 December, 2009, 16:16
> LF
>=20
> Does anybody else on the reflector suffer from BC-splatter
> on 136kHz? It has
> been a regular occurance here lately after dark. After some
> identification work
> I have a match on the running programmes on 171 and 225kHz,
> 225kHz being the
> stronger.
>=20
> 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.
>=20
> 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 band
> making "ghost whispers".
>=20
> 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.
>=20
>=20
> BR
>=20
> Paul-Henrik, OH1LSQ
>=20
>=20
>=20
>=20
>=20
>=20