Hi All. The signal on 137 khz. I have heard this signal before. Yesterday it was
about S5 about 1500/1700 utc and then it was about S8 during the evening
1900/2200utc. It could be spurious from another signal on lf. Those with df
loops
might be able to give, at least a direction.
The commercial operators could locate it precisely. A simple system like SSL
would be able to give a distance and location. Does anyone have this facility or
know of one who has.
At this frequency a couple of simple loop antennas or more dispersed around
europe could give a fairly accurate fix. No speculation needed.
Rik Strobbe wrote:
I monitored the 137kHz 'mistery signal' last night :
1. Although it sounds RTTY-like I cannot see any mark /space lines with GRAM
2. It came out of the noise arround 21.30UT and built up (with some QSB
periods) until 23.00UT (when I went to bed). I left the ON5OO software
running all night (from 22UT until 08UT) the signal was still there (and
loud) at that time.
I will have a look at the data from the ON5OO software tonight.
At 21:43 4/01/00 -0000, you wrote:
> Hi all, the mystery grows deeper...I enclose a copy of an e-mail from
>Jon...
>--------------------------------------------------
>Well, I can confirm that this is *not* CFH. Our transmitter is
>still powered off. I had to call the site as all I have here is again
>wideband noise. It is drizzling and when you walk by the high-voltage
>transmission lines, you can actually hear the water accumulated on the
>insulators fizzing off. I can't wait to move out to the countryside!
>................................
>
>Best wishes, Jon - VE1FTL
>------------------------------------------------------
>Mmmm interesting.... we know from some other comments that there are other
>stations on that frequency....but to my remembrance they were located on the
>West Coast, San Diego way I think!!
>The signal is already visible on my display (2130z) but I forgot to activate
>a scroll back so I can't look to see when it appeared first. I was too busy
>watching 'Horizon' . The modulation is certainly not what we are used to
>seeing from CFH. It is either a more complex data mode or maybe Fax. I have
>a display of a band of 'noise dots' about 60Hz wide at its present weaker
>strength. Not a bit like RTTY which gives two distict lines for the mark and
>space freqs.
>Any other ideas??
>Cheers de Alan G3NYK JO02PB
>[email protected]
>
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