Hi Jim, Markus and group,
Thanks for your explanations and Jim's effective height plot. This
was used to estimate the interval (07-22ut) for which the phase was
inverted. Between 17 and 24 September, the phase was artificially
inverted over this interval using SL and a spectrum was extracted.
This continued to show the 2 peaks at +-12 uHz.
Perhaps I was being naive in expecting the doublet to vanish and
single peak to reappear or I was conpetent in using SL.
73,
Joe VO1NA
On Wed, 12 Sep 2018, [email protected] wrote:
Hello Joe,
Fine signal!
"What would cause a 180 degree phase shift? Is there an XOR gate in the
sky?"
Might we say "D" Flip Flop (comparatively slow rise/fall).
Attached is roughly how the effective height change of the D layer would
change your signal's phase midnight to midnight UT.
Markus's estimate of ~ 180 degrees is probably much more accurate than the
attached.
73,
Jim AA5BW
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of [email protected]
Sent: Wednesday, September 12, 2018 10:03 AM
To: [email protected]
Subject: Re: LF: VO1NA 8270.0075 Hz
Hello Markus and Paul, group,
That's a much better explaination than Doppler shift. What would cause a
180 degree phase shift? Is there an XOR gate in the sky.
A few more dB will depend on getting some plastic machined. Hopefully this
will be before the end of winter.
The TX is off since ~10ut due to lightning in the forecast.
73
Joe VO1NA
On Tue, 11 Sep 2018, Markus Vester wrote:
That continuous trace on Paul's spectrogram is impressive - great work!
Attempting to extract a long spectrum from Paul's data creates a split
peak at +-12 uHz from the center, suggesting a repeating near 180B0 phase
difference between day and night.
A close look on our Bavarian 31 uHz spectrograms seems to bring up some
faint traces on the right frequency, but to be more sure we still need a few
dB less noise, or more ERP.
Best 73,
Markus (DF6NM)
-----UrsprC<ngliche Mitteilung-----
Von: jcraig <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Mo, 10. Sept 2018 21:33
Betreff: Re: LF: VO1NA 8270.0075 Hz
I've not been mucking with the tx or tuning so perhaps Mother Nature
has provided an ERP improvement -- the wx has been quite dry recently.
Thank-you for the report and the spectrogram service. It keeps me
entertained, especially since it seems impossible to see my own sigs
with a remote setup at distances greater than about 10 km.
Been playing with vt tools and a cheap sound card.
73
Joe VO1NA
On Sun, 9 Sep 2018, Paul Nicholson wrote:
VO1NA from Newfoundland with 10uW must hold the record for the longest
running VLF transmission!
Coming in well the last couple of days -
http://78.46.38.217/fbins3.html#p=1536487200&b=280&s=sp&m=cardioid&w=r
&h=62&z1=0.34&z2=0.64&c=1
An ERP improvement, or good propagation?
--
Paul Nicholson
--
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