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Date: Tue, 15 Nov 2016 21:22:35 +0100
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Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz
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Hi Paul,

Many thanks for the decodes from these streams. What is the most distant 
location from where a stream is available?

Interestingly, the phase of my signal is less stable in Bielefeld than 
on your side. OK, it can be expected but now we saw it.
So maybe this is an advantage of more distant locations? I remember the 
VLF grabber of TF3HZ, who received my kite transmission on 8.97 kHz. 
Maybe he will join in again and even provides a stream? The distance 
would be 2440 km.
Probably he is reading this, i would expect :-)

The (unknown) phase stability over a certain path and time is the 
question. And its reproducibility.
It looks like we started something here, a thing that could become the 
trick how to get world wide VLF communication by amateur radio stations. 
You see i become a bit crazy now ;-)
Edgar J. Twining is the man i'm thinking about! I know he has the 
skills, motivation and RX sites to be the man for the unbelivable 
project. Maybe he is reading this as well.

Now a next question/idea comes up to me: When observing the phase of 
available signals (DHO38, GBZ, JXN, ALPHAs...), can we conclude to the 
phase on 6.47 kHz? I mean daily!
Assume we would try to transfer a message to Australia by using the 
currently tested technique. Then there will be 'good' and 'not so good' 
days. Not only different QRN levels, also phase changes may become a 
problem. If someone, let's say in Tasmania, would run a wideband RDF 
spectrogram (yes Markus, i know. I will do it soon! Now the time has 
come!) and can monitor the phase of DHO38 on 23.4 kHz, is this of any 
use for 6.47 kHz or 8.27 kHz??
At least it would be most useful to observe the VLF spectrum from there, 
trying to find some correlations. We need an expert there!


The linux commands and your vlf utils are a future project for me. It 
will be a big project i assume. But maybe its better to let me be the 
one on the TX side.

Am 14.11.2016 20:09, schrieb Paul Nicholson:
>   11th Nov      3.9   -62.5 -141.2 8K19A   60   4   'TEST'
>  12th Nov      4.9   -59.7 -134.3 8K19A   60   4   'TEST'
>  11th + 12th   6.6   -58.1 -137.5 8K19A   60   4   'TEST'
>  13th Nov      8.5   -55.6 -138.5 8K19A   60   4   'TEST'
>  11th to 13th  8.6   -55.2 -137.8 8K19A   60   4   'TEST'
>  14th          3.5   -61.3 -136.8 8K19A   60   4   'TEST'
>  11th to 14th  9.9   -54.3 -137.6 8K19A   60   4   'TEST' 
Thanks for the table.
What's the result of 15 th and 11th to 15 th on your side?

Its better not to mix up the day and night transmissions now. The night 
transmissions are a separate experiment. But if their phase is stable as 
well, one could correct the phase offset and use them for a decode. So 
we can simply avoid the time where QSB and the Terminator passes the 
path. To be checked...

73, Stefan