Return-Path: Received: from mtain-me04.r1000.mx.aol.com (mtain-me04.r1000.mx.aol.com [172.29.96.140]) by air-md02.mail.aol.com (v129.4) with ESMTP id MAILINMD021-8b784d76084350; Tue, 08 Mar 2011 05:43:15 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me04.r1000.mx.aol.com (Internet Inbound) with ESMTP id C2D2E38000096; Tue, 8 Mar 2011 05:43:13 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PwuMh-00071c-Fc for rs_out_1@blacksheep.org; Tue, 08 Mar 2011 10:42:07 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PwuMg-00071T-KP for rsgb_lf_group@blacksheep.org; Tue, 08 Mar 2011 10:42:06 +0000 Received: from imr-da04.mx.aol.com ([205.188.105.146]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PwuMf-0007oG-6f for rsgb_lf_group@blacksheep.org; Tue, 08 Mar 2011 10:42:06 +0000 Received: from imo-da01.mx.aol.com (imo-da01.mx.aol.com [205.188.169.199]) by imr-da04.mx.aol.com (8.14.1/8.14.1) with ESMTP id p28Ag0Pu004703 for ; Tue, 8 Mar 2011 05:42:00 -0500 Received: from MarkusVester@aol.com by imo-da01.mx.aol.com (mail_out_v42.9.) id l.e9c.e8330bf (56027) for ; Tue, 8 Mar 2011 05:41:55 -0500 (EST) Received: from smtprly-mc02.mx.aol.com (smtprly-mc02.mx.aol.com [64.12.95.98]) by cia-md08.mx.aol.com (v129.9) with ESMTP id MAILCIAMD081-d3cf4d7607f020; Tue, 08 Mar 2011 05:41:55 -0500 Received: from webmail-m040 (webmail-m040.sim.aol.com [64.12.101.223]) by smtprly-mc02.mx.aol.com (v129.9) with ESMTP id MAILSMTPRLYMC021-d3cf4d7607f020; Tue, 08 Mar 2011 05:41:52 -0500 References: <4D717AE4.1040506@freenet.de> <1044.fa863b.3aa4a9f9@UNKNOWN> To: rsgb_lf_group@blacksheep.org Date: Tue, 08 Mar 2011 05:41:52 -0500 In-Reply-To: <1044.fa863b.3aa4a9f9@UNKNOWN> X-MB-Message-Source: WebUI MIME-Version: 1.0 From: Markus Vester X-MB-Message-Type: User X-Mailer: AOL Webmail 33356-STANDARD Received: from 194.138.39.54 by webmail-m040.sysops.aol.com (64.12.101.223) with HTTP (WebMailUI); Tue, 08 Mar 2011 05:41:52 -0500 Message-Id: <8CDAB9491F1DB09-588-8569@webmail-m040.sysops.aol.com> X-Spam-Flag:NO X-AOL-SENDER: MarkusVester@aol.com X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=disabled,FORGED_AOL_TAGS=0.281,HTML_MESSAGE=0.001,UNPARSEABLE_RELAY=0.001 Subject: Re: VLF: Long carriers on 8970 Content-Type: multipart/alternative; boundary="--------MB_8CDAB949200235B_588_15365_webmail-m040.sysops.aol.com" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=FORGED_AOL_TAGS,HTML_20_30, HTML_FONTCOLOR_UNKNOWN,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 x-aol-global-disposition: G x-aol-sid: 3039ac1d608c4d76084120b1 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ----------MB_8CDAB949200235B_588_15365_webmail-m040.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Dear group, I have uploaded a few pictures of the transmit setup and my attempts towar= ds "acoustical coil shielding" to the folder http://df6nm.bplaced.net/VLF/VLF_110304-06/ Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Markus Vester An: rsgb_lf_group@blacksheep.org Verschickt: So., 6. Mrz. 2011, 10:05 Thema: VLF: Long carriers on 8970 Since Friday 21:45, I have been transmitting an unmodulated carrier on 897= 0.000. It is not GPS locked, but controlled by a Rb standard which has bee= n calibrated to better than about 0.05 ppb. The carrier has been on contin= uously with uninterrupted phase and 0.29 A into the home antenna (about 5= uW EMRP), and I intend to leave it on until 12 UT today. =20 The purpose of this experiment is to observe the 9 kHz diurnal propagation= cycle across 180 km to the DK7FC grabber, and compare to it to the patter= n of the long carrier from DJ8WX (8970.022) across 500 km. Both trace are= mostly well visible in Stefan's "6000" window, with some features worth= noting: =20 - For the 180 km path, generally the strongest signals is seen during morn= ing and afternoon periods, with a shallow minimum around noon. For 500 km= however, there is a proad maximum around noon from 7 to 17 UT, coinciding= with the daily QRN minimum. =20 - There appears to be a pronounced dip before sunrise around 4:30 for DF6N= M, whereas DJ8WX shows a broad minimum from abot 2 to 5 UT. =20 - Both stations seem to be affected by a loss of signal on some evenings= after 18 UT. The signal seems to drop out while the QRN is building up.= This could be a real propagation effect. But there may also be the possib= ility of a receiver artifact, perhaps caused by the injected 10 kHz GPS to= ne being affected by QRN. On the other hand, Stefan's Alpha window shows= perfect lock. =20 The DFCW signals in the screenshot are a nice "G" sent by OE3GHB, an "NM"= from here, and a local test by Stefan from a PC nextdoors. =20 Best regards, =20 Markus=20 (DF6NM in Nuernberg JN59NK) =20 Markus=20 (DF6NM in Nuernberg JN59NK) ----------MB_8CDAB949200235B_588_15365_webmail-m040.sysops.aol.com Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="utf-8"
Dear group,
 
I have uploaded a few pictures of the transmit setup and my attempts&= nbsp;towards "acoustical coil shielding" to the folder

Best 73,
Markus (DF6NM)

-----Urspr=C3=BCngliche Mitteilung-----
Von: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group@blacksheep.org
Verschickt: So., 6. Mrz. 2011, 10:05
Thema: VLF: Long carriers on 8970

Since Friday= 21:45, I have been transmitting an unmodulated carrier on 8970.000.= It is not GPS locked, but controlled by a Rb standard which has been cali= brated to better than about 0.05 ppb. The carrier has been on continu= ously with uninterrupted phase and 0.29 A into the home antenna (abou= t 5 uW EMRP), and I intend to leave it on until 12 UT today.
 
The purpose= of this experiment is to observe the 9 kHz diurnal propagation cycle = ;across 180 km to the DK7FC grabber, and compare to it to the pa= ttern of the long carrier from DJ8WX (8970.022) across 500 km.= Both trace are mostly well visible in Stefan's "6000" window, with&n= bsp;some features worth noting:
 
- For the 180 km path, generally the stro= ngest signals is seen during morning and afternoon periods, with a sh= allow minimum around noon. For 500 km however, there is a proad maxim= um around noon from 7 to 17 UT, coinciding with the daily QRN minimum.
 
- There appears to be a pronounced d= ip before sunrise around 4:30 for DF6NM, whereas DJ8WX shows a broad= minimum from abot 2 to 5 UT.
 
- Both stations seem to be affected= by a loss of signal on some evenings after 18 UT. The=  signal seems to drop out while the QRN is building up. Thi= s could be a real propagation effect. But there may also be the possi= bility of a receiver artifact, perhaps caused by the inject= ed 10 kHz GPS tone being affected by QRN. On the other hand, Stefan's= Alpha window shows perfect lock.
 
The DFCW signals in the screenshot&n= bsp;are a nice "G" sent by OE3GHB, an "NM" from here, and a local tes= t by Stefan from a PC nextdoors.
 
Best regards,=
 
Markus
(DF6NM in Nuernberg JN59NK)
 
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