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 v97M2TCB016743 for ; Sun, 8 Oct 2017 00:02:31 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1e0x6N-0007c0-5y for rs_out_1@blacksheep.org; Sat, 07 Oct 2017 22:57:43 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1e0x6M-0007br-BL for rsgb_lf_group@blacksheep.org; Sat, 07 Oct 2017 22:57:42 +0100 Received: from omr-a019e.mx.aol.com ([204.29.186.67]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1e0x6I-0004kD-3w for rsgb_lf_group@blacksheep.org; Sat, 07 Oct 2017 22:57:41 +0100 Received: from mtaomg-aam01.mx.aol.com (mtaomg-aam01.mx.aol.com [172.27.19.147]) by omr-a019e.mx.aol.com (Outbound Mail Relay) with ESMTP id 58C6038000A8 for ; Sat, 7 Oct 2017 17:57:36 -0400 (EDT) Received: from core-acd04h.mail.aol.com (core-acd04.mail.aol.com [172.27.22.14]) by mtaomg-aam01.mx.aol.com (OMAG/Core Interface) with ESMTP id 1F42B38000082 for ; Sat, 7 Oct 2017 17:57:36 -0400 (EDT) Received: from 188.192.44.165 by webjas-vae177.srv.aolmail.net (10.96.23.180) with HTTP (WebMailUI); Sat, 07 Oct 2017 17:57:34 -0400 Date: Sat, 7 Oct 2017 17:57:36 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15ef8d7f085-c0b-23128@webjas-vae177.srv.aolmail.net> In-Reply-To: MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.44.165] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1507413456; bh=PVhaxZN5U7CKlUr0gIbPPUmir1w+BxKWIwfK4hF/1MQ=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=LRkjMqePSEt/d6swt1rU8PzshT332nvFDzv43iNIOe2eBBZhGj90AivFowqLGy0wI BL9tzssMxL68OQ5bkphWBTvfqm4zBqt95nkL9jNX0gZFYG2syJXnWCmwKt/OWFD2NY Co2ppz4mWNpF7rfZN3IaqT5bPCWyZ7sMkKIPgJOw= x-aol-sid: 3039ac1b139359d94dd00707 X-Spam-Score: 0.0 (/) 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 the administrator of that system for details. Content preview: Hi Joe, good to know that you are on air again. The DL0AO grabber in Amberg (East Bavaria) includes your frequency in one of the 31 uHz instances. > Yes, the high wire for 630m (~5 W EIRP) and the low for 36000m. Shouldn't that be the other way round, maximizing the important VLF radiation ? ;-) [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 09c1a181dc7b5fd4ce37590584a561d1 Subject: Re: LF: VO1NA in Todmorden on 8270 Hz Content-Type: multipart/alternative; boundary="----=_Part_175106_1593720863.1507413454981" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR 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 ------=_Part_175106_1593720863.1507413454981 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Joe, good to know that you are on air again. The DL0AO grabber in Amberg (East B= avaria) includes your frequency in one of the 31 uHz instances.=20 > Yes, the high wire for 630m (~5 W EIRP) and the low for 36000m. Shouldn't that be the other way round, maximizing the important VLF radiati= on ? ;-) > Yes, pps and NMEA to SpecLab but evidently no discipline yet Getting the SpecLab samplerate detector to work will lock your frequency bu= t not the phase. To avoid the risk of phase jumps due to soundcard glitches= or buffer underruns, I would then strongly recommend to set up the softwar= e PLL with audio feedback from a pickup probe. This method also has the adv= antage of maintaining absolute phase despite variations in the antenna circ= uit. But I have to admit that setting up SpecLab that way is a bit more inv= olved, especially when you also want to apply PSK modulation for EbNaut. With the programmable ourtput frequency from the NEO7, you may have two oth= er, simpler options:=20 - You could tell the NEO to output the desired transmit frequency directly= . For EbNaut, you can later add the traditional XOR or balanced mixer circu= it. - You could use the NEO with high frequency output as a clock source for yo= ur DDS. EbNaut could be generated either by XOR or by manipulating the DDS = phase word. Best wishes, Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: jcraig An: rsgb_lf_group Verschickt: Sa, 7. Okt 2017 18:46 Betreff: Re: LF: VO1NA in Todmorden on 8270 Hz Paul Markus and Group, Thanks Paul for the reports. The radiation gives more gratification than th= e efforts to get a stable carrier. On Sat, 7 Oct 2017, Markus Vester wrote: > Great result! Truly astounding that Paul can receive 10 uW at 3600km with 10+ dB S/N. > Hmm I thought that VO1NA had been on 477 kHz during those nights. Joe are= you transmitting MF and VLF simultaneously, on two antennas? Yes, the high wire for 630m (~5 W EIRP) and the low for 36000m. > Do you already have GPS lock available on 8.27 kHz? Yes, pps and NMEA to SpecLab but evidently no discipline yet. The pps pulse= looks strange on the SL scope and there are 'PPS zero-crossing too=20 flat' debug errors on SL SR correction. This is all the NEO7M seems willing= to provide at the moment; connecting the raspi3 to the tiny USB=20 pins on the NEO7M was fun, but otherwise unproductive. I'm hoping it's poss= ible to send commands directly to the neo7m via usb without a special chip. RSNTP is running on the SL pc. 73 Joe > > 73, Markus > > > > -----Urspr=C3=BCngliche Mitteilung----- > Von: Paul Nicholson > An: rsgb_lf_group > Verschickt: Sa, 7. Okt 2017 10:36 > Betreff: LF: VO1NA in Todmorden on 8270 Hz > > > > VO1NA on 8270.00709 is a good nighttime signal at Todmorden > recently. Here are the last three night's spectra in 34.72 uHz > (8 hours 23:00 to 07:00 UT) using combined E-field and H-field. > > http://abelian.org/vlf/tmp/171007b.gif S/N 12.6 dB > http://abelian.org/vlf/tmp/171007c.gif S/N 14.5 dB > http://abelian.org/vlf/tmp/171007d.gif S/N 11.4 dB > > Not bad for 8uW ERP at range 3575 km and an undisciplined > OCXO. > > -- > Paul Nicholson > -- ------=_Part_175106_1593720863.1507413454981 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi Joe,

good to know that you are on= air again. The DL0AO grabber in Amberg (East Bavaria) includes your&n= bsp;frequency in one of the 31 uHz instances.

> Yes, t= he high wire for 630m (~5 W EIRP) and the low for 36000m.
S= houldn't that be the other way round, maximizing the important VLF rad= iation ? ;-)

> Yes, pps and NMEA to Spe= cLab but evidently no discipline yet
Getting the SpecLab samplerate dete= ctor to work will lock your frequency but not the phase. To avoid the risk = of phase jumps due to soundcard glitches or buffer underruns, I would = then strongly recommend to set up the software PLL with audio feedback= from a pickup probe. This method also has the advantage of maint= aining absolute phase despite variations in the antenna circ= uit. But I have to admit that setting up SpecLab that way is a bi= t more involved, especially when you also want to apply PSK modulation for = EbNaut.

With the programmable ourtput frequency from the NEO7, = you may have two other, simpler options: 
- You could te= ll the NEO to output the desired transmit frequency directly. For EbNa= ut, you can later add the traditional XOR or balanced mixer circuit.- You could use the NEO with high frequency output as a clock source= for your DDS. EbNaut could be generated either by XOR or by manipulating t= he DDS phase word.

Best wishes,
Markus

-----U= rspr=C3=BCngliche Mitteilung-----
Von: jcraig <jcraig@m= un.ca>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.or= g>
Verschickt: Sa, 7. Okt 2017 18:46
Bet= reff: Re: LF: VO1NA in Todmorden on 8270 Hz

Paul Markus and Group,

Thanks Paul= for the reports. The radiation gives more gratification than the efforts = to get a stable carrier.

On Sat, 7 Oct 201= 7, Markus Vester wrote:

> Great result!=

Truly astounding that Paul can receive 10= uW at 3600km with 10+ dB S/N.

> Hmm I = thought that VO1NA had been on 477 kHz during those nights. Joe are you tra= nsmitting MF and VLF simultaneously, on two antennas?

Yes, the high wire for 630m (~5 W EIRP) and the low for 36000m.=

> Do you already have GPS lock availab= le on 8.27 kHz?

Yes, pps and NMEA to SpecL= ab but evidently no discipline yet. The pps pulse looks strange on the SL s= cope and there are 'PPS zero-crossing too
flat' debug erro= rs on SL SR correction. This is all the NEO7M seems willing to provide at = the moment; connecting the raspi3 to the tiny USB
pins on= the NEO7M was fun, but otherwise unproductive. I'm hoping it's possible t= o send commands directly to the neo7m via usb without a special chip.

RSNTP is running on the SL pc.
=
73
Joe

&g= t;
> 73, Markus
>
>= ;
>
> -----Urspr=C3=BCngliche Mitteil= ung-----
> Von: Paul Nicholson <vlf0403@abelian.org>
= > An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
> Vers= chickt: Sa, 7. Okt 2017 10:36
> Betreff: LF: VO1NA in To= dmorden on 8270 Hz
>
>
>
> VO1NA on 8270.00709 is a good nighttime signal = at Todmorden
> recently. Here are the last three night's= spectra in 34.72 uHz
> (8 hours 23:00 to 07:00 UT) usin= g combined E-field and H-field.
>
> <= a href=3D"http://abelian.org/vlf/tmp/171007b.gif" target=3D"_blank" abp=3D"= 2745">http://abelian.org/vlf/tmp/171007b.gif S/N 12.6 dB
> http://abelian.org/vlf/tmp/171007c.gif S/N 14.5 dB
> http://abelian.org/vlf/tmp/171007d.gif S/N 11.4 d= B
>
> Not bad for 8uW ERP at range 35= 75 km and an undisciplined
> OCXO.
><= br abp=3D"2754">> --
> Paul Nicholson
> --
------=_Part_175106_1593720863.1507413454981--