|
Hi Stefan
I am convinced, but do it again.
On UK TV many years ago there was an advertisement for car
tyres, they didn't use an actor but an ex chief of police to say
"I am convinced that this is a contribution to road safety". The
one thing he didn't sound was convinced. I cant write with that
tone in my voice. :-)
73 Eddie G3ZJO
On 11/02/2017 13:49, DK7FC wrote:
Hi all,
Meanwhile my 1 week taking transmission, starting 01.FEB.2017
23:30
UTC on 2970.000000 Hz at 150...170 mA is completed. I tried to
leave a
trace/peak into a range beyong 3 wavelengths.
Renato Romero / IK1QFK is running a 5 uHz FFT spectrogram on 2970
Hz.
He's using a well working E field antenna in Cumiana/Italy.
The spectrogram is running since christmas evening 2016, available
at
http://www.webalice.it/rromero/live_cumiana/last-LFtest_2970.jpg
There are time markers in 1 week intervals.
I can see a dash, a trace right on the frequency. It appeared 2
days
after i started transmitting, which is expected with an FFT window
time
of nearly 3 days. The SNR was up to 12 dB during the visual
observation
of incoming spectra.
Partly, the trace disappered during the transmission time
(destructive
interference with QRN). However i can see a resulting trace of a
high
average SNR and exact (!) frequency stability relative to the
other
traces beeing present in the spectrogram.
I would tend to call it a serious detection of my signal.
Spectrogram
experts, what's your opinion please?
The distance is quite exactly at 5 wavelength on that 101 km band!
It would be a first detection on ULF (0.3...3 kHz) between DL
- I
!
73, Stefan
|
|
