Date: Wed, 28 Dec 2016 14:30:09 -0330 (NST)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <159377c5fb0-275f-1de09@webprd-m63.mail.aol.com>
Message-ID: <Pine.LNX.4.64.1612281416010.20461@plato.ucs.mun.ca>
References: <159377c5fb0-275f-1de09@webprd-m63.mail.aol.com>
MIME-Version: 1.0
Content-ID: <Pine.LNX.4.64.1612281418210.20461@plato.ucs.mun.ca>
Subject: Re: LF: EbNaut beaconing from JN64
Content-Type: MULTIPART/MIXED; BOUNDARY="-1719232024-1178767339-1482947203=:20461"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Status: RO

  This message is in MIME format.  The first part should be readable text,
  while the remaining parts are likely unreadable without MIME-aware tools.

---1719232024-1178767339-1482947203=:20461
Content-Type: TEXT/PLAIN; CHARSET=X-UNKNOWN; format=flowed
Content-Transfer-Encoding: QUOTED-PRINTABLE
Content-ID: <Pine.LNX.4.64.1612281418211.20461@plato.ucs.mun.ca>

Hi Markus,

Thank-you for your efforts.  The pilot was generated using a raspi/ad9851
but there have been troubles with instability. Bypassing, shielding, etc
over the past few days yeielded no satisfaction and, sadly, a fried pi/SD
card!  The arduino still works but the high precision math has to
be done on another machine as work continues on getting a replacement=20
pilot.

73 Joe VO1NA

PS Stefan's coil is very compact.  0,4 mm wire?  Hope it can take the kV!
PPS Paul's article greatly apprectiated.  Thanks!=20
PPPS All the best to all in 2017


On Sun, 25 Dec 2016, Markus Vester wrote:

> Hi Joe,
>
>
> today I found the time to look into your files from Dec 19/20 (1220xx08.t=
xt etc.). The pilot level is just right now. Assuming an accurate 10 MHz DD=
S-clock, the theoretical pilot frequency would be 137499.999255 Hz, consist=
ent with the -0.8 mHz offset that I had found last time. This allows us to =
determine the course of your RX center frequency, which apparently drifted =
about 10 mHz upwards during that night (137499.8988 to 137499.9088 Hz).
>
>
> Some of the files (e.g. 0708 and 0608, see png) showed phase jumps, which=
 are presumably due to occasional short audio dropouts in the soundcard pro=
cessing. In principle it should be possible to correct these glitches a-pos=
teriori but I have not attempted to do so. The 0308, 0408 and 0508 files lo=
oked good so I calculated the expected offsets for Ric's transmit frequency=
 and attempted decodes. Unfortunately no useful result appeared yet.
>
>
> LF DX conditions haven't been too good lately. But I'm sure that once the=
y improve, you will be able to pick up more than one European EbNaut statio=
n.
>
>
> Best 73,
> Markus
>
>
>
> -----Urspr=C3=BCngliche Mitteilung-----
> Re: LF: EbNaut beaconing from JN64
> Von: jcraig <jcraig@mun.ca>
> An: LF Group <rsgb_lf_group@blacksheep.org>
> Datum: Mi, 21 Dez 2016 5:17 pm
>
>
> Hi Ric,
>
> The files are uploaded. Good luck to you and the other EbNaut experts
> in your efforts to extricate your message!
>
>
> 73
> Joe
>
>
> -----Urspr=C3=BCngliche Mitteilung-----
> Von: jcraig <jcraig@mun.ca>
> An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
> Verschickt: Di, 20 Dez 2016 7:11 pm
> Betreff: Re: LF: EbNaut beaconing from JN64
>
>
> Hi Ric, EbNauters,
> SL txt files are available from last night. 12200008.txt 1200018.txt, etc=
=2E
> rsNTP and a reduced amplitude pilot on 137.5 kHz were used. Files
> will be uploaded on request.
>
> 73
> Joe VO1NA
---1719232024-1178767339-1482947203=:20461--