Hi Paul,
Amazing! Although there's no result yet :-)
It's a distance of 8.7 wavelengths. A detection would be a good DX
result on the lowest frequency ever used by radio amateurs. Something
NEW i would say ;-)
It should be no problem to add 20(+) dB in future coil designs.
Am 04.06.2016 18:57, schrieb Paul Nicholson:
Stefan wrote:
> Message 22.05.2016: 'cqcq dk7fc in jn49ik'
18.22 dB in 4.06 uHz,
http://abelian.org/vlf/tmp/160604a.gif
That was the 68 hour transmission on 6.47 kHz at 270 mA. Going from 6.47
kHz to 2.97 kHz means -6.8 dB, 270 mA to 30 mA means -19 dB, i.e. 26 dB
less signal. But i estimate the average QRN background is at least 10 dB
lower. So let's say the SNR is 16 dB lower.
That would mean 2 dB in 4 uHz. If 8 dB SNR produces a peak of acceptable
significance, i need to transmit for about 10 days! So let's say 2 weeks
:-) After 2 weeks there could be something significant :-)
It would be very interesting to see the peak SNR building up day by day
in a smaller and smaller BW. I'm looking forward to that.
The carrier is on the air since 92 hours now...
73, Stefan
Am 29.06.2016 16:03, schrieb Paul Nicholson:
> Paul, if you are reading this: It may be worth
> to try to integrate the overall transmission
> time into one peak.
I've been trying with this transmission, and your earlier
tests too. Bandwidths down to 6.6 uHz. I've been trying
combinations of days and nights and both.
So far, not the faintest hint of signal.
I will continue to try, for as long as you can maintain the
carrier without phase interruption.
--
Paul Nicholson
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