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Fwd: Re: LF: EbNaut on LF

To: "[email protected]" <[email protected]>, IZ7SLZ <[email protected]>
Subject: Fwd: Re: LF: EbNaut on LF
From: DK7FC <[email protected]>
Date: Thu, 18 Aug 2016 16:56:54 +0200
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv: Gecko/20100227 Thunderbird/3.0.3
Hi Joe, LF,

Domenico seems to have a modern PC :-) He decoded your message as received here :-)

73, Stefan

-------- Original-Nachricht --------
Betreff: Re: LF: EbNaut on LF
Datum: Thu, 18 Aug 2016 16:41:34 +0200
Von: Domenico IZ7SLZ <[email protected]>
An: DK7FC <[email protected]>, Markus Vester <[email protected]>

Good afternoon Stefan,

thanks for posting the audio file. I tried the decoding procedure  with success !

The question is : Who is Prof. Gill ?

Joe VO1NA  made a very strong transmissions  last night but still no decode here. I will increase list lenght  and hope to get his message with high rank number.

Again many compliments.
73, Domenico iz7slz

On 18 August 2016 at 11:06, DK7FC <[email protected]> wrote:
Hi Joe,

Thanks for the feedback.
Yes, 137.477 is fine.
A text file has 1516 kB here. The one that could contain your message is at Markus already asked for the file to try to decode what i received in JN49IK. My sr-file contains "30000.6436 128 524288 137500".

73, Stefan

Am 18.08.2016 00:42, schrieb [email protected]:
Hi Stefan,

Perhaps I should QSY back to 137.477 again!  On 777 tonight and will
try 477 tomorrow if that's OK.  How big are the text files?

I use your grabber to check my sigs.  Thanks for this service!


On Wed, 17 Aug 2016, DK7FC wrote:

Hello Joe,

I'm sorry, i forgot to mention that i'm getting my EbNaut decodes from the exportet FFT data (text files) from OPDS. That means the transmission must be somewhere arround 137.5 kHz +- 50 Hz.
Maybe i can search for a PC with 64 bit here in the institute to decode your 155 char message. I still have the text file :-)

73, Stefan

Am 16.08.2016 20:33, schrieb [email protected]:
OK Stefan, lets try a shorter message (54 chars) tonight starting 2300 utc and every 15 mins.  150 watts 2 amps RF. 137.777 kHz  1432 0.2 s
symbols, 4K19A.

I like my 32 bit machine too!

Thanks for the helpful advice Markus.  I noticed the different colours
on your grabber.  Will go for a shorter message this time.


On Tue, 16 Aug 2016, DK7FC wrote:

Hi Joe,

Unfortunately it looks like the EbNaut decoder can't decode 155 characters on this PC (4 GB RAM). The number of characters seems to be limited to 66 :-(
I don't have any 64 bit systems available here.

73, Stefan

Am 16.08.2016 01:24, schrieb [email protected]:
Dear Group,

Reports of the OP32 sigs from R7NT, F5WK, Graham, Markus, Hugh, Stefan
Dominico and others who I inadvertently left out are gratefully acknowledged.

Tonight by popular demand starting 2330 and every 15 mins, EbNaut 155
chars 0.2 seconds 771.2 s message duration, 4K19A polynomial.  500w
3.5A to the 100m RL. Reports most welcomed. Good luck to all.
(Let's hope I've set it up correctly!)


On Mon, 15 Aug 2016, DK7FC wrote:

Hi Markus,

Thanks, very nice. 131 characters in 0.2 s symbols, that's great!

Joe, could you run a similar transmission again? Maybe with a longer text :-)

73, Stefan

Am 15.08.2016 15:05, schrieb Markus Vester:
Hi Stefan, here's a result from Joe's 131 character transmission, Dec 4/5 2015.

Best 73,

-----Ursprüngliche Mitteilung-----
Von: DK7FC <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Mo, 15 Aug 2016 1:55 pm
Betreff: Re: LF: last 23 Hr 136 op32

Hi Joe,

Is it right that you sent some EbNaut with many symbols on LF in the
past (last season) ?
I didn't give it a try that time. Now i would be interested in a TA
detection of an EbNaut signal.
Which symbol length did you choose that time?

73, Stefan

Am 15.08.2016 01:13, schrieb [email protected] <mailto:[email protected]>:
> Thank-you Graham and Dominico.
> I was suprised to get the reports because there was a mismatch.
> The Decca was on one module only to see what happens.
> Just started an OP32 frame 2300 utc with 500 watts 3.5 amps and without
> a mismatch.
> Friday night's lightning may have modified the tuning coil --
> it took a while to clean the soot and ashes! It has been rebuilt
> and seems to be working well. It has taps for the RL and another
> for the tower as a back-up when the RL is out of service.
> 73 to all
> Joe VO1NA

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