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

[DK7FC <selberdenken@posteo.de>]

Hi Paul,

Hmm, that's a pity. Maybe it would be useful to run a beacon, 
periodically the same message in shorter symbols, maybe 40s. A single 
character would be already fine, like 'R'. This would take 3:33:20 to be 
sent. I could do this each 4 hours.
Or i can send a simple carrier for a few days. However i want to build a 
circuit which keeps the antenna current constant, even during rain, so 
the ERP stays constant!
73, Stefan

Am 14.05.2016 12:59, schrieb Paul Nicholson:
> Stefan wrote:
>
> > f = 6470.00000 Hz
> > Start time: 13.05.2016   00:00:02 UTC
> > Symbol length: 100 s
> > Characters: 6
>
> I haven't been able to decode this one.   The average noise
> was 3.7 dB higher than the previous successful message, so
> there should still be a couple of dB to spare.
>
> I've tried a wider range of phase search in case the
> day/night phase change was more than expected.
>
> So far it seems that 6.47 is more variable and unpredictable
> than 8.27 which is opposite to what I'd expect.
>
> --
> Paul Nicholson
> --