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Re: VLF: A 300 char message?

To: [email protected]
Subject: Re: VLF: A 300 char message?
From: DK7FC <[email protected]>
Date: Sun, 12 Nov 2017 15:49:09 +0100
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Hi Paul,

Wow, 49 GB :-)
Here it took 4600 seconds for a full phase search and  a list length of 200.

6E6 list size? The calculator page says 325804 is optimum. Wouldn't it be more promising to try a set of noise blanker settings to gain maybe 0.1...0.2 dB from the individual QRN from last night?
BTW i use the bad wx to wind another coil on a bucket. With 5 fully
wound buckets i think i can reach < 4.5 kHz at 300 mA! The 5th coil
which is just wound to 30% must stay as it is in the moment because i
want to complete a few more messages (3 and 12 characters) on 5170 Hz
when Alex is back in a few weeks...
I can try 16K19A (when it will be available) and 500 chars at 1 seconds
symbols maybe. We are in the spectrum of the impossible anyway, so it
will work, because it can't!
73, Stefan


Am 12.11.2017 15:02, schrieb Paul Nicholson:
> The message will be repeated today starting 17:15 UTC,
> just like yesterday...

Great.  So far no result from last night, although the decoder
is still working through a full phase search with 6Meg list size
(49 Gbyte RAM).

Last night was quiet. Another night should do it if the noise
remains low.

> Coding 4K19A

Pity we can't do rate 1/16, would make a significant difference
with these long messages.

--
Paul Nicholson
--





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