Re: LF: VO1NA 8270.0075 Hz

[Markus Vester <markusvester@aol.com>]

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 180° 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)


-----Ursprüngliche Mitteilung-----
Von: jcraig <jcraig@mun.ca>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
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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Todmorden_spectrum_1.6uHz.png
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vo1na_dl0ao_df6nm_180911.png
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