Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz

[DK7FC <selberdenken@posteo.de>]

Hello Paul, VLF,

Well, its almost unbelivable. What can i say, i'm really impressed, your 
results are remarkable! Congrats to your and our success. We continue to 
learn about working on VLF. The 46km band is very interesting i find.
Actually all this is worth to write an article somewhere i find. But i 
am not the one to do that, lack of motivation, somehow.
In the recent weeks i became a bit sceptic if we will ever manage to 
pass 20 characters on that band. But now i am very optimistic about it. 
With the tecnique we are currently experimenting with, it will be 
possible. 20 characters would be fine, then i would leave that band and 
move down to 5.17 kHz, like in the good old kite experiment times. The 
58 km band, wow :-) I'm looking forward to that!!! And i am optimistic 
that we will manage, let's say and define: 15 characters! That should be 
the goal :-)
But, if you like, we could try to start an attempt to transfer 50 
characters on 6.47 kHz with the currently tested technique. I already 
found a message ;-) It would be sent at 10 second symbols 8K19A, taking 
07:25:20, each day.
Am 12.11.2016 08:06, schrieb Paul Nicholson:
> On Oct 7th Stefan wrote:
>
> > f = 6470.00000 Hz
> > Start time: 07.10.2016   21:00:02 UTC
> > Symbol length: 80 s
> > Characters: 15
> > CRC 16
> > Coding 16K25A
> > Duration: ?? Something arround 44 hours?
> > Antenna current: 270 mA (ish)
>
> Copied 'DK7FC JN49IK 73'
I confirm. You've got it! That is the best result so far. I will update 
my list :-)
Done, the list is in attachment. It is not complete yet, actually the 
SNR in BW is more informative than the message itselfe. Anyway...
73, Stefan

EbNaut_VLF_list.png
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