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Re: LF: LF and VLF EbNaut

To: [email protected]
Subject: Re: LF: LF and VLF EbNaut
From: [email protected]
Date: Thu, 6 Dec 2018 20:08:38 -0330 (NST)
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Hi Markus,
The dds word was  59045922 which gives 137477.000244.  DOXCO was
good to +-10 ppb last time it was checked. The next project is a
GPS disciplined LF carrier.

73 & GL and thanks again!

Joe

On Thu, 6 Dec 2018, Markus Vester wrote:

Hi Joe,

do you know those offsets? So far I've received a carrier from you on the 
nominal frequency and got good asterisk decodes with fairly flat phase.  
Nothing on 479 yet.

Best 73,
Markus


-----Ursprüngliche Mitteilung-----
Von: jcraig <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Fr, 7. Dez 2018 0:00
Betreff: Re: LF: LF and VLF EbNaut

Hi Markus,

There will be dds and DOCXO offsets on LF. The VLF is GPS disciplined.
I got off to a rough start -- but the next frame (2300) should be good.  
Thanks for your online resources!

73 & GL
Joe

On Thu, 6 Dec 2018, Markus Vester wrote:


Hi Joe and Rob,

running a pair of autodecoders for both signals: 
http://df6nm.darc.de/opds/ebnautresults.txt

Joe is your frequency exactly on 137477.000 or should we consider a small DDS 
offset? Are you on GPS-lock or still with the OXCO?

Best 73,
Markus

-----Ursprüngliche Mitteilung-----
Von: Rob Renoud <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Do, 6. Dez 2018 20:29
Betreff: LF: 2200m EbNaut Beacon(s) from North America

LF EbNaut Enthusiasts, The K3RWR EbNaut beacon is currently transmitting on 2200m and 
will remain on the air through the weekend until Monday @ 1200 UTC 2018/11/1 (weather 
permitting) Operating Details:Freq:  137.479000 kHzCoding:  8K19ACRC: 16Symbol 
Period: 3 secMessage Length:  5Duration:  25m 36sRepeats on 00m & 30m Understand 
that VO1NA plans on coming up on 137477 kHz on EbNaut making two North American 
Stations running EbNaut beacons this weekend. 73 & GL,Rob – K3RWRFM18qi

-----Ursprüngliche Mitteilung-----
Von: jcraig <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Do, 6. Dez 2018 20:04
Betreff: LF: LF and VLF EbNaut

Thanks to all for the encouragement and advice. We have a nasty storm on
the way so let`s get started before it`s too late...

LF:
137.477 kHz, 6 Chars, 8K19A, 3 s symbols, 416 symbols,  starting 1900 ut
and at 1 hr intervals, 50 watts to a 100x20m RL

VLF:
8.2700075 kHz, one character, 30 s symbols, 784 symbols,  16K23A, CRC-21,
2300 and 1100 ut daily 30 watts to a 100x15m RL

Best 73`s and good luck,
Joe VO1NA


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