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Date: Mon, 28 May 2001 11:02:17 +0100
To: rsgb_lf_group@blacksheep.org
From: "Walter Blanchard" <blanch@pncl.co.uk>
Subject: Re: LF: Unid non-LORAN transmission at 100 kHz ?
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At 13:48 27/05/01 Sunday, you wrote:
>Is anybody on the list hearing this signal or has Trond as he suspects
>got a local problem?
>
>73s Tracey
>
>-----Original Message-----
>From: Trond Jacobsen <trond.jacobsen@halden.net>
>Date: 27 May 2001 13:37
>Subject: Unid non-LORAN transmission at 100 kHz ?
>
>
> >At the moment is there a strong unid signal just below 100 kHz. When
>first detected it could be best described as a very slow FSK signal
>  mark frequency 99.8 kHz / frequency shift 475 Hz ), after a short break
>this changed to steady, but reduced, carrier at the space frequency, -
>with non-regular spaced pulses of carrier at the mark frequency. This
>later signal show after first examination some similarity to the earlier
>reported unid pulses at 115.2 kHz. The pulses at 99.8 kHz has both an
>audible and visible 100 Hz overtone,
> >
> >These signals at 99.8 kHz are absolutely not part of the ordinary LORAN
>splatter. Recordings and spectrograms of both types of signals, ( FSK
>look-alike and pulses ) available on request.
> >
> >Anyone else out there who receives this ? Or have I got myself a very
>anoying local source of industrial generated QRM ?
> >
> >best regards
> >
> >Trond at ALFLAB, Halden in Norway

Very likely, yes!!!!
Absolutely nothing here last 24 hours between 82.7 and 115 kHz.
(except Loran of course)

Walter G3JKV.