Return-Path: X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: ** X-Spam-Status: No, score=2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_MUA_OUTLOOK,HTML_40_50,HTML_MESSAGE autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tA8Jo2XX010469 for ; Sun, 8 Nov 2015 20:50:03 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZvVvo-0007tf-OW for rs_out_1@blacksheep.org; Sun, 08 Nov 2015 19:47:16 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZvVvo-0007tW-E3 for rsgb_lf_group@blacksheep.org; Sun, 08 Nov 2015 19:47:16 +0000 Received: from rgout0406.bt.lon5.cpcloud.co.uk ([65.20.0.219]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZvVuk-0007IR-3S for rsgb_lf_group@blacksheep.org; Sun, 08 Nov 2015 19:47:15 +0000 X-OWM-Source-IP: 86.136.57.57 (GB) X-OWM-Env-Sender: alan.melia@btinternet.com X-CTCH-RefID: str=0001.0A090205.563FA672.002D,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 X-Junkmail-Premium-Raw: score=38/50,refid=2.7.2:2015.11.8.180915:17:38.343,ip=86.136.57.57,rules=__HAS_MSGID, __SANE_MSGID, MSGID_32HEX_LC, INVALID_MSGID_NO_FQDN, __MSGID_32HEX, __HAS_FROM, __PHISH_FROM2, __FRAUD_WEBMAIL_FROM, __TO_MALFORMED_2, __TO_NO_NAME, __REFERENCES, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __SUBJ_ALPHA_END, __MIME_VERSION, __CT, __CTYPE_MULTIPART_ALT, __CTYPE_HAS_BOUNDARY, __CTYPE_MULTIPART, __HAS_X_PRIORITY, __HAS_MSMAIL_PRI, __HAS_X_MAILER, USER_AGENT_OE, __OUTLOOK_MUA_1, __USER_AGENT_MS_GENERIC, __ANY_URI, LINK_TO_IMAGE, __FRAUD_BODY_WEBMAIL, __CP_URI_IN_BODY, __C230066_P2, __SUBJ_ALPHA_NEGATE, SUPERLONG_LINE, __URI_IN_BODY, __HTML_AHREF_TAG, __HAS_HTML, BODYTEXTP_SIZE_3000_LESS, BODY_SIZE_6000_6999, BODYTEXTH_SIZE_10000_LESS, __MIME_HTML, __TAG_EXISTS_HTML, RDNS_GENERIC_POOLED, __URI_NS, SXL_IP_DYNAMIC[57.57.136.86.fur], RDNS_SUSP_GENERIC, __PHISH_FROM, __OUTLOOK_MUA, RDNS_SUSP, __FRAUD_WEBMAIL, FORGED_MUA_OUTLOOK, BODY_SIZE_7000_LESS, REFERENCES, NO_URI_HTTPS X-CTCH-Spam: Unknown Received: from gnat (86.136.57.57) by rgout04.bt.lon5.cpcloud.co.uk (8.6.122.06) (authenticated as alan.melia@btinternet.com) id 563A090A00759CD6 for rsgb_lf_group@blacksheep.org; Sun, 8 Nov 2015 19:45:14 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=btcpcloud; t=1447011929; bh=jfPaVbfjT72bg2f7v50Gq8jOhFaHtmfjk2t9CMis0u4=; h=Message-ID:From:To:References:Subject:Date:MIME-Version:X-Mailer; b=WtoNufBy0ajeP7bOA/IpfLyHFFwuH9jmw/9h8fKMGyeLcHGsBR4G3IPRxGTcCjx88cdJss3qpSuorF8bsY4Y2p9aSydrArwZm4EyV0oho7bipfs46a7zudMG6WaKr1A7TmmVKUDnPo3AnXMAcSFj39iRxb3fuUJwDIsqXriCDxU= Message-ID: <00DEC5C7770845F0862210FC140FA99B@gnat> From: "Alan Melia" To: References: Date: Sun, 8 Nov 2015 19:45:16 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-Scan-Signature: 54f9a9b24d9d5f31a632377c3b90b222 Subject: LF: Re: MSF Oddities Content-Type: multipart/alternative; boundary="----=_NextPart_000_009C_01D11A5D.FE018C10" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 4915 This is a multi-part message in MIME format. ------=_NextPart_000_009C_01D11A5D.FE018C10 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi Andy, that plot has all the indication of a "trip" .....maybe a mouse = of a very (very) big spider in the loading coil :-)) the exciter would = continue, only the PA would trip, so it would come back in sync.=20 There never seemed to be power changes at Rugby but now under commercial = contract with Babcock (ex VT comms) there are obvious pressures to keep = costs down. As far as I am aware from old T&F Club meetings at = Teddington around when the move first occured the contract on lt calls = for a minimum field strength over the UK. So I suppose they would be = justified in reducing the power at night, though I have never seen that = acknowleged anywhere. Out of interest my cheapie clock took an extra 24 = hours to sync after the hour change. I have pinged the Radio Astro group to see if there are other = recordings. Alan G3NYK ----- Original Message -----=20 From: Andy Talbot=20 To: rsgb_lf_group@blacksheep.org ; rsgb_lf_group@yahoogroups.co.uk=20 Sent: Sunday, November 08, 2015 7:08 PM Subject: LF: MSF Oddities I've been using the MSF 60khz signal as a test source for cohernet LF = Rx development. And in doign so I've noticed a couple of oddities First was tonight, see http://www.g4jnt.com/DownLoad/MSF_Log2.jpg = where it appears to have dropped for a few minutes round about 1715z. I = didn't catch this in real time to check and only saw the plot = afterwards, but fail to see how that could be a software glitch that = recovered so perfectly afterwards. Also note the reduction in power around 1800. I spotted this = yesterday too - and that was confirmed by listening on another receiver. = The signal really was several dB weaker after, AFAIR, about 1800 ish. = So it looks as if they may drop the power after dark when propagation = is expected to be at its best. Once again, blame the VE2ZAZ GPSDO for the phase shift of something = like 40 degrees over 2 hours. That corresponds to only 2.5* 10^-10 at = 60kHz , but is very noticeable on plots such as this. Andy G4JNT ------=_NextPart_000_009C_01D11A5D.FE018C10 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable =EF=BB=BF
Hi Andy, that plot has all the = indication of a=20 "trip" .....maybe a mouse of a very (very) big spider in the loading = coil :-))=20 the exciter would continue, only the PA would trip, so it would = come back=20 in sync.
 
There never seemed to be power changes = at Rugby but=20 now under commercial contract with Babcock (ex VT comms) there are = obvious=20 pressures to keep costs down. As far as I am aware from old T&F=20 Club meetings at Teddington around when the move first occured = the=20 contract on lt calls for a minimum field strength over the UK. So I = suppose they=20 would be justified in reducing the power at night, though I have never = seen that=20 acknowleged anywhere. Out of interest my cheapie clock took an extra 24 = hours to=20 sync after the hour change.
 
I have pinged the Radio Astro group to = see if there=20 are other recordings.
 
Alan
G3NYK
 
----- Original Message -----
From:=20 Andy=20 Talbot
Sent: Sunday, November 08, 2015 = 7:08=20 PM
Subject: LF: MSF Oddities

I've been using the MSF 60khz signal as a test source = for=20 cohernet LF Rx development.   And in doign so I've noticed a = couple of=20 oddities

First was tonight, see http://www.g4jnt.com/= DownLoad/MSF_Log2.jpg=20   where it appears to have dropped for a few minutes round about=20 1715z.  I didn't catch this in real time to check and only saw = the plot=20 afterwards, but fail to see how that could be a software glitch that = recovered=20 so perfectly afterwards.

Also note the reduction in power around 1800.   I spotted = this=20 yesterday too - and that was confirmed by listening on another = receiver. =20 The signal really was several dB weaker after, AFAIR, about 1800 ish. =  =20  So it looks as if they may drop the power after dark when = propagation is=20 expected to be at its best.

Once again, blame the VE2ZAZ GPSDO for the phase shift of = something like=20 40 degrees over 2 hours.  That  corresponds to only 2.5* = 10^-10 at=20 60kHz , but is very noticeable on plots such as this.

Andy  G4JNT
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