Hi Mike, It could be, DCF39 is a 24/7 signal, and the spreading looks like
that Laurence was reporting in Anchorage, and is due to the "randon" return
of the carrier phase after data bursts ( Markus DF6NM has explained in
previous posts) Possibly also some spreading effect due to the keying. It
will be very difficult to get a solid ID although I am not aware of anything
else on that channel. It has been received in Anchorage, Ghana, Puerto Rico,
Mexico. At the dot speed you are using (120sec ??) you will not be able to
see the data bursts These are FSK and with a shift of about 280Hz I
think...but I would have to check on that. It would be interesting to see at
what the fastest dot speed you could see the signal would be. The other
check is to try to determine (geoclock ?? or better a Great Circle clock
map) whether there was darkness between you and Magdeburg during that
period. It may be a polar path. If it is DCF39, I would think dawn at your
end and Magdeburg should correlate fairly well with the reception times.
Very interesting please do let us know what you find. This might be the
furthest confirmed reception....I believe a report was made some years ago
(VK or ZL??), I am not sure whether it could be confirmed or stays as a
"possible"
Cheers de Alan G3NYK
[email protected]
----- Original Message -----
From: "McAlevey" <[email protected]>
To: <[email protected]>
Sent: 08 April 2004 23:00
Subject: LF: DCF39
I observed this signal centred on 138.83kHz for 4 hours last night. Is it
possibly DCF39?
Mike ZL4OL
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