Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id wBJ80Pxg009486 for ; Wed, 19 Dec 2018 09:00:33 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gZWc3-0005Ch-E7 for rs_out_1@blacksheep.org; Wed, 19 Dec 2018 07:49:51 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gZWbx-0005CY-Cr for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 07:49:45 +0000 Received: from mout.web.de ([212.227.17.12]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gZWbt-0004u4-Uv for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 07:49:44 +0000 X-DKIM-Result: Domain=web.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1545205778; bh=T54WBXrpb2NvUVay/H2/upi/h37azeuyVpkaDoxgggw=; h=X-UI-Sender-Class:From:To:Cc:References:In-Reply-To:Subject:Date; b=o43JRwOYa/dAQYf8nfmNWt2VwY0DneTNoV5umKSUIol+Unjkb5QkGWyn5imuRAfYR uQ3/8PuJIz8Y0ILAqqPCFCQhPZezlZW42aVo+pyuOgKED7sVORs47hfUR4Z2gcNGG1 vWsRA+P65ZFuhI4x/nIw0PbLXWETKhIAAX1wCX1s= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from MarcoT520 ([94.135.174.214]) by smtp.web.de (mrweb102 [213.165.67.124]) with ESMTPSA (Nemesis) id 0LdF4n-1hH4q01iWv-00iPYX; Wed, 19 Dec 2018 08:49:37 +0100 From: "Marco Scholz" To: Cc: "=?utf-8?Q?'VIGILANT_Luis_Fern=C3=A1ndez'?=" References: <10f465fa-37f0-4ac6-b53d-793f955ea011@email.android.com> In-Reply-To: <10f465fa-37f0-4ac6-b53d-793f955ea011@email.android.com> Date: Wed, 19 Dec 2018 08:49:37 +0100 Message-ID: <001201d4976f$6510c970$2f325c50$@web.de> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 15.0 Thread-Index: AQCoIeQuE32HvwjsUXJHU78RPABzMafel4dw Content-Language: de X-Antivirus: Avast (VPS 181219-0, 19.12.2018), Outbound message X-Antivirus-Status: Clean X-Provags-ID: V03:K1:M8bVWmLH4iX7yPxSDf3Gsd9RTypBZ0ZIB5vzuu6NR7l7LT9JaBw Gj+V7lQ104zWCbNSXWW5C+0Tpm8WEIXE9ltqszB8G3hDX7pUf2h60jOwz4nKVytk1EaTyr4 qy3WtO9992wOXBSn4e0zSQTp6Jgzxy+h/Z2T8gtaPuX1J7lgoyH1jhDH0ixjtaDnkt25hqC RsGMODG7kyY4cZv621QYw== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:Ewsjb4WBV4Q=:hwKiqVy/mQr0cJA/0TSQI+ CNd7T70f3/FF4DfIDZaI94o92VgpxOwIdCLfYfkkVIRiXdrNkN8B/vWwwitbZ6KcVl5i/Dp/J lxvoX2heSoQF2z1A2na7gIidfzqTbMqwEKqLkH5G1G/lWdRv+pTPqZaVIJsiQz1t9Jhl0hS5E M8KsNsb+TbX5S5JqwFUCae9aflQlFyapzvYRkR2t6aQRBS3UuyM7vOkG7LtnXKt4kd3JsOZHg 4ZCkNf0pkS56SDkxEPxJkHzpKn6TBeAvMnS8CF0FfDvH3quPNjF8CY0vWyate9z3/Mzh8teaS SWOQ2LJ6+LNa5pT1Kj+z8NG7CO1qJIYMDqGH5pDK9wJcJvktbwYpyWMYrciAR49xLc9+DDGYM iBqldEKWJq5a5ma4OWm0R9tL5VuU07jVCGYZvP7R97JRsgc1NJsSQlf6qRWFvqfLezjtvTASn IC3zw9BZbiv3iDMhmJXAmWP54uLclQixXAxjjYPVkFJN/RVoqJfiFZCms8TRszXYgpVQsKBba XtILik1TiKlyTyptxGHi/zIJzVtkuZ3cQ9YWR81kE3k44QmdoJnbRUWpiXSp/ZAqvkITQptto Ru4r83DQvLtOLqYK9JMZBVvzzyX2BeLJRIVOLt6Z0z6diOTFRMzagmdZ99WZOE27FqpHk+rLJ L7QysU7A6cfLqDcWWeDuf1yIbpDilaP7VzmyT91Lv8RVsSdUl+WCLLh7kKBzo3ti1vi2AfGXm Dbs67bTCyAiWpDxq6WT/VlOORYBT5e6L1nBoJjofpxWFC0cE9043ZQTQCWWWjXsqp/HBAYIro OUfiOi2ihoaztQWGODiGIs7Mja9BK12s5ZkCT0TX+HM277AXK/8Nv1rQO6MLn7NZaV1yS7mIW aLj14D8jbvq6KZkKewGQ0aZcL+3gRNBYvtgrQlxhigyYZCi9/JxEx4FneCRXEx X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Good morning Luis, i agree and i had success just with my FT-857 as receiver which is not GPS stabilized (just a TCXO-9 installed). The only challenge was to find out the exact frequency offset. Easily I compared a coup [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [212.227.17.12 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (scholzmarco[at]web.de) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 0.0 T_REMOTE_IMAGE Message contains an external image X-Scan-Signature: bb13d668bd6c56d236c8970bb5dcbf33 Subject: AW: LF: Ebnaut receiver frequency stability qustion Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01D49777.C6D7A270" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_50_60,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false This is a multipart message in MIME format. ------=_NextPart_000_0013_01D49777.C6D7A270 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Good morning Luis, i agree and i had success just with my FT-857 as receiver which is not GPS = stabilized (just a TCXO-9 installed). The only challenge was to find out th= e exact frequency offset. Easily I compared a couple of OP32 decodes with t= he result of the Grabber from Markus, DF6NM. So setup is Miniwhip, G0MRF LF preamp, FT857 feeding soundcard EMU-0202 whe= re the right channel get 1pps signal from my 10MHz ref. Not a very sensitive receiving setup, but good enough to decode several sta= tions in EBnaut up to VO1NA. Which you all a nice Christmas time and hny vy73 Marco DD7PC Von: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksh= eep.org] Im Auftrag von VIGILANT Luis Fern=C3=A1ndez Gesendet: Mittwoch, 19. Dezember 2018 07:39 An: rsgb_lf_group@blacksheep.org Betreff: Re: LF: Ebnaut receiver frequency stability qustion Hi EbNaut I think that using expensive receivers is NOT the way to go. I'm using a si= mple mixer as downconverter. The LO is 120KHz generated from a uBlox GPS. S= o the 137KHz outputs as 17KHz and can be feeded to PC soundcard. The second= channel of GPS provides 1pps to discipline the soundcard using Spectrum la= b Not using filters at all and no amplifier stages. So there is room for impr= ovement, but it works 73 de Luis EA5DOM El 19 dic. 2018 1:33, Markus Vester > escribi=C3=B3: Hi Chris, Kiwi-SDR: Last year I asked the same question to John Seamons, and he expla= ined that the GPS frequency correction is done in software, and won't actua= lly lock the LO phase to GPS. RSP2: It seems possible to replace the TXCO by an external 24 MHz reference= =2E But the difficulty with the digital output is that you need to be sure = that buffer over/underruns never occur in the subsequent audio processing. = With an analog receiver, SpecLab can correct glitches when you feed a 1pps = time reference to the other soundcard channel. Unfortunately you can't do t= hat with an all-digital audio path. 73, Markus -----Urspr=C3=BCngliche Mitteilung----- Von: Chris Wilson > An: rsgb_lf_group@blacksheep.org >; rsgb-lf= -group@groups.io >; Discussion of the Lowfer (US, European= , & UK) and MedFer bands > Verschickt: Di, 18. Dez 2018 23:54 Betreff: LF: Ebnaut receiver frequency stability qustion Hello Ebnauters Would a KiwiSDR (which I do not own but was thinking of buying) have adequate LF frequency stability for Ebnaut reception given it uses 1PPS from a GPS receiver to stabilize the frequency? Or do I need a receiver with a true GPS trained reference input? I see only one cheaper price end RX with such a port, the SDRPlay RSP2, but that expects a 24 MHz reference input rather than the common 10 MHz. I have a Trimble Thunderbolt for a 10 MHz reference, but nothing that could give 24 MHz. What commercial SDR's could I look to for suitable stability please, that are good on LF and below, and a reasonable cost? Thanks 2E0ILY -- Best regards, Chris mailto:dead.fets@gmail.com --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren gepr=C3=BCft. https://www.avast.com/antivirus ------=_NextPart_000_0013_01D49777.C6D7A270 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Good morning Luis,

i agree and i had= success just with my FT-857 as receiver which is not GPS stabilized (just = a TCXO-9 installed). The only challenge was to find out the exact frequency= offset. Easily I compared a couple of OP32 decodes with the result of the = Grabber from Markus, DF6NM.

So setup is Miniwhip, G0MRF LF prea= mp, FT857 feeding soundcard EMU-0202 where the right channel get 1pps signa= l from my 10MHz ref.

Not a very sensitive receiving setup, bu= t good enough to decode several stations in EBnaut up to VO1NA. =

Which you all a nice Christmas time and hny=

vy73

Marco

DD7PC=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0

<= p class=3DMsoNormal> = ;

Von: owner-rsgb_lf_group= @blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag v= on VIGILANT Luis Fern=C3=A1ndez
Gesendet: Mittwoch, 19. Dezem= ber 2018 07:39
An: rsgb_lf_group@blacksheep.org
Betreff: Re: LF: Ebnaut receiver frequency stability qustion

=

 

Hi EbNaut

&nbs= p;

I think that using expensive re= ceivers is NOT the way to go. I'm using a simple mixer as downconverter. Th= e LO is 120KHz generated from a uBlox GPS. So the 137KHz outputs as 17KHz a= nd can be feeded to PC soundcard. The second channel of GPS provides 1pps t= o discipline the soundcard using Spectrum lab

 

Not u= sing filters at all and no amplifier stages. So there is room for improveme= nt, but it works

 <= /o:p>

73 de Luis

EA5DOM

=  

El 19 dic. 2018 1:33, Markus Vest= er <markusvester@aol.com>= escribi=C3=B3:

<= span style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>= Hi Chris,

Kiwi-SDR: Last year I asked the same question to = ;John Seamons, and he explained that the GPS frequency correction is&n= bsp;done in software, and won't actually lock the LO phase t= o GPS.

RSP2: It seems possible to replace the TXCO by an extern= al 24 MHz reference. But the difficulty with the digital output is that you= need to be sure that buffer over/underruns never occur in the subsequ= ent audio processing. With an analog receiver, SpecLab can correc= t glitches when you feed a 1pps time reference to the other = soundcard channel. Unfortunately you can't do that with an all-digital= audio path.

73, Markus

-----Urspr=C3=BCngliche Mitteilung---= --
Von: Chris Wilson <dead.fet= s@gmail.com>
An: = rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>; rsgb-lf-group@groups.io <rsgb-lf-group@groups.io>; Discussion of the Lowfer (= US, European, & UK) and MedFer bands <lowfer@mailman.qth.net>
Verschickt: Di, 18. Dez 2018 = 23:54
Betreff: LF: Ebnaut receiver frequency stability qustion

 

 

Hello  Ebnauters

 

Would a KiwiSDR (which I do not own but was thinking of buying) have

adequate LF frequency s= tability for Ebnaut reception given it uses

1PPS from a GPS receiver to stabilize the frequency?= Or do I need a

recei= ver with a true GPS trained reference input? I see only one

cheaper price end RX with such a por= t, the SDRPlay RSP2, but that

expects a 24 MHz reference input rather than the common 10 MHz. I<= o:p>

have a Trimble Thunde= rbolt for a 10 MHz reference, but nothing that

<= div>

could give 24 MHz.

 

What commercial SDR's could I look to for suitable stability plea= se,

that are good on = LF and below, and a reasonable cost? Thanks 2E0ILY

 

--

B= est regards,

Chris&nb= sp;                     &= nbsp;   mailto:dead.fets@gmail.= com

 

 

 


3D"" Virenf= rei. www.avast.com
=
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