Hi Eddie, VLF,
Thanks for watching! The spectrogram looks fine and i haven't expected
that S/N from my low ERP i have here.
Since 10 UTC i switched to DFCW-600 which is well visible at OK2BVG
http://www.ok2bvg.cz/vlfgrabber/ but the QRN is higher than in the last
days.
Strongs wind comes up here now, so maybe i have to QRT soon. If not i
will try to transmit my complete call in DFCW-600.
All in all i think the transmissions on the fixed antenna look
promising if i can add another 6 dB but a real kite experiment with the
300m vertical just gives a 20 dB stronger signal and allows better
detections in a shorter time. I also like the transmissions on 5170 or
6470 Hz.
73, Stefan/DK7FC
Am 27.11.2011 09:57, schrieb qrss:
Overnight signals at IO92ng http://g3zjo.bplaced.net
attached
73
Eddie G3ZJO
On 27/11/2011 00:01, Stefan Schäfer wrote:
Paul, VLF,
Am 27.11.2011 00:16, schrieb Paul:
Stefan,
I register here your signal on the new frequency.
That is fine. Of course i am watching your "grabber" but saw that the
signal seems to be weaker since 20 UTC. Is this due to the rising
noise? I would think so...
Overnight I expect your S/N here to decline, may even lose
the signal in the noise. Expecting that as the noise comes
up at Marlton, so will the signal. We shall see.
Yes. Here, these days the noise has its maximum just before 0 UTC so it
may become even better here!
Laurence/KL7UK and Bill/VE2IQ are running their grabbers too. They use
GPS locking (with SpecLab, which seems to work well) and loop antennas.
See http://kl7uk.com/VLFAlaska.html
and http://www.magma.ca/~ve2iq/grabs/index.htm
Attached provisional uncalibrated spectrum from Marlton 17:00
to 21:00 in one integration.
That looks quite clear. I still can't belive it completely. Does all
that mean we have done the first transatlantic detection of a
non-commercial generated signal on VLF? If so, please write a good
explaning webpage as you did 2010 (it was very nice to read, especially
the conclusions ;-) ), so that i can post the link on the LF group!
After first hour on new frequency, the peak on Marlton's
spectrum has moved from 8970.0 to 8970.005. Will send
phase data in later email.
Which would confirm what is actually done and so it rises the
proof that this is my signal! Wow!
Will you change frequency again at say 02:00 in order to
complete a 'K' ?
No, i will now stay on 8970.005 until at least 9 UTC which should allow
some further integration times to get a better detection. Maybe some
signals will come up in Alaska too. Laurence often reported that DHO38
is strongest just before my local sunrise and has a sudden drop then.
This is my first over-night transmission so i am optimistic to get some
more interesting results and propagation phenomena can be observed.
BTW, there is room for another 3...6 dB ERP here...
73, Stefan/DK7FC
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