Return-Path: X-Spam-DCC: paranoid 1182; 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=-0.1 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_HOTMAIL_RCVD,HTML_MESSAGE,SPF_PASS 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 u98F5ocY007352 for ; Sat, 8 Oct 2016 17:05:51 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bst7l-00017m-TN for rs_out_1@blacksheep.org; Sat, 08 Oct 2016 16:01:17 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bst7l-00017d-9i for rsgb_lf_group@blacksheep.org; Sat, 08 Oct 2016 16:01:17 +0100 Received: from bay004-omc3s11.hotmail.com ([65.54.190.149]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-SHA384:256) (Exim 4.87) (envelope-from ) id 1bst7i-00056N-E3 for rsgb_lf_group@blacksheep.org; Sat, 08 Oct 2016 16:01:16 +0100 Received: from EUR03-DB5-obe.outbound.protection.outlook.com ([65.54.190.189]) by BAY004-OMC3S11.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.23008); Sat, 8 Oct 2016 08:01:10 -0700 X-DKIM-Result: Domain=outlook.com Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outlook.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=PLlkPVyrvwZxoN5791psw+4s3yit3KT4y4XIFPrUd8A=; b=U8TpVbUtj+kss1qh0SR1eaf88aEZHghAeHuTIY1AswgjclAzUP+nvo6tLRs5TqUCw/wDhj4Awm5uqMo5HkVLCqyX7hap6/llVBTfamv7071TiJHTQvtjmz5D8Sl5Yoqal2Z8r2xwiYIbuoXED3u90AMXJmM2cNkh5UAwyBWbZW+ORxBp9nmb3IWS0ugyQJ6lzlpBXFVUcc4+t1kmLF/7kYmd8r+QORJeIi2MxydvftEBuqPVnt0vEcUvOoAG5JgI630DsM3SbZsIlp3KhSre3ng4UfSuEqqSkwxwA2UuiUOV/zEhLiTmfm58/fM9oM6vfqlVRaFYMxKhXLklSA1KVQ== Received: from DB5EUR03FT027.eop-EUR03.prod.protection.outlook.com (10.152.20.58) by DB5EUR03HT032.eop-EUR03.prod.protection.outlook.com (10.152.20.254) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.629.5; Sat, 8 Oct 2016 15:01:09 +0000 Received: from DB6PR1001MB1320.EURPRD10.PROD.OUTLOOK.COM (10.152.20.60) by DB5EUR03FT027.mail.protection.outlook.com (10.152.20.121) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.629.5 via Frontend Transport; Sat, 8 Oct 2016 15:01:09 +0000 Received: from DB6PR1001MB1320.EURPRD10.PROD.OUTLOOK.COM ([10.171.77.147]) by DB6PR1001MB1320.EURPRD10.PROD.OUTLOOK.COM ([10.171.77.147]) with mapi id 15.01.0639.013; Sat, 8 Oct 2016 15:01:09 +0000 From: James Cowburn To: "rsgb_lf_group@blacksheep.org" Thread-Topic: ULF: A new step on the large ULF coil... Thread-Index: AQHSIPN1eracl7wgd0mkxLqdIM4FjaCefBOAgAArj4A= Date: Sat, 8 Oct 2016 15:01:09 +0000 Message-ID: References: <57F83029.8010104@posteo.de> <157a440eec0-52d4-3118@webprd-m89.mail.aol.com> In-Reply-To: <157a440eec0-52d4-3118@webprd-m89.mail.aol.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: blacksheep.org; dkim=none (message not signed) header.d=none;blacksheep.org; dmarc=none action=none header.from=outlook.com; x-ms-exchange-messagesentrepresentingtype: 1 x-eopattributedmessage: 0 x-microsoft-exchange-diagnostics: 1;DB5EUR03HT032;6:djZuvHlmLXBS464/bw6WtwTZ9doxUgoAIyhXqtLxzqyg7Rp0rN+FeMPYBt5o2pljTRLd5rGWJe4+qfnyi9Y6pmcsyrHBrFZF4/ZJOA/P5hYtZWjyuRzVAfYp/aV6/ip8V3bjpmSs+OCPaSF+/2RShXHAgWkNUW8A7WviNE+fq1heWFG98Jtv/o6xKWe1uoSZQSe/MaP9Wdu5PIeQSlYMllsprhzbVeiwIZDPVpu4pEcwsnBI5qIXOgybtTgi+uz7QgrK8oaeQ7eHzMkK7ZxCJEg7G1PHANaBfBnhrhGfnnE=;5:68YO2hkNE9E9t7K1gfP1+tcAugzE96fe/ZaPhp9IRofB9nf7ETqKgcPeoqtEstyvDZcGRHWWsruCk8oKQ3XIpRiW8mfTEOvcfpcg07bxMpiu0QIlNwOryKT0y4k9t9n6rwubDW9LMxWzMF7m8q2zJw==;24:YWVEKR1F1PwfVEhOUS79gt0BTWzc+dxqiUtQzF3ZCbLB39nOR4h43eHK0ZkkoiStEzY//EPCLs0VBFetdb9+yFfpzY+Cs47u4D4ixidVpTA=;7:mWDnpu1lQkExVh3hjmgu8fRDLx3369Bsk+JM4PtkVTnvFFDJudA1yVNmaZU9jSTcJDZ8Sd/mzsa1WGb3NfGS1H2994N9E7sI1MeXQPF3JdfA48TEGmUFkxjabkaCdqBhVll5d06Nqo0SbkH7H/EWAgBHKP8kl+fpMrv4R8WkvTNkx2TqUZx/wztV6Maq5Q3j7UkbFmOI4uyqHgVRiGRrbQOSqDDN1HwA4MUTp742c6zTc602Qks2ziNlfaFYlU8wgY8ReC1fRbVCph9LyHyihANOw+1f3zp4hXZpH6XeOrdeJ7S1UAVl067j+pYkhpJv x-forefront-antispam-report: EFV:NLI;SFV:NSPM;SFS:(10019020)(98900003);DIR:OUT;SFP:1102;SCL:1;SRVR:DB5EUR03HT032;H:DB6PR1001MB1320.EURPRD10.PROD.OUTLOOK.COM;FPR:;SPF:None;LANG:en; x-ms-office365-filtering-correlation-id: fd12cc3c-1e23-402d-c04d-08d3ef8bef46 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(1601124038)(1603103081)(1601125047);SRVR:DB5EUR03HT032; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(432015012)(82015046);SRVR:DB5EUR03HT032;BCL:0;PCL:0;RULEID:;SRVR:DB5EUR03HT032; x-forefront-prvs: 008960E8EC spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Oct 2016 15:01:09.4395 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB5EUR03HT032 X-OriginalArrivalTime: 08 Oct 2016 15:01:11.0084 (UTC) FILETIME=[CE74A6C0:01D22174] X-Scan-Signature: 170d09a2454389e326e0caea8d7379f3 Subject: RE: ULF: A new step on the large ULF coil... Content-Type: multipart/alternative; boundary="_000_DB6PR1001MB1320EFB10A8F796E839E000FECD90DB6PR1001MB1320_" 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 10.1.3.11 Status: RO X-Status: X-Keywords: X-UID: 8968 --_000_DB6PR1001MB1320EFB10A8F796E839E000FECD90DB6PR1001MB1320_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Wow! That's a coil!!! With best regards Jim Dr. Jim Cowburn Tel. 01767 600522 Mob. 07967 300152 jim.cowburn@outlook.com https://uk.linkedin.com/in/jamescowburn This email is sent from the account of Dr. James Cowburn and is strictly co= nfidential and intended solely for the addressee(s).If you are not the inte= nded recipient of this email you must: (i) not disclose, copy or distribute= its contents to any other person nor use its contents in any way or you ma= y be acting unlawfully; (ii) contact Dr. Cowburn immediately on +44 (0)1767= 600522 quoting the the addressee then delete it from your system. I have = taken reasonable precautions to ensure that no viruses are contained in thi= s email, but do not accept any responsibility once this email has been tran= smitted. You should scan attachments (if any) for viruses. ________________________________ From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacks= heep.org] On Behalf Of Markus Vester Sent: 08 October 2016 13:25 To: rsgb_lf_group@blacksheep.org Subject: Re: ULF: A new step on the large ULF coil... ...she's a Beauty! Yes, I also think the idea of augmenting the new stacked= coil with the yoghurt-coil should work well. The mutual coupling will help= to increase the inductance, and you can fine-tune by adjusting the vertica= l position. With the votage shared between the two coils, you could comfort= ably run > 0.25 A at 2.97 kHz, 15 dB more than your last ULF experinment. T= his might well be strong enough to be detected in Todmorden. Best 73, Markus -----Urspr=FCngliche Mitteilung----- Von: DK7FC An: rsgb_lf_group Verschickt: Sa, 8 Okt 2016 1:32 am Betreff: ULF: A new step on the large ULF coil... Hi ULF, This night i have completed the 4th stack of my large ULF loading coil. An image: https://dl.dropboxusercontent.com/u/19882028/ULF/20161008_ULF_TX_= coil.jpg The exciting question was, what is the new resonance frequency together wit= h my antenna. In the lab i put an equivalent C in parallel and found the re= sonance peak at 3.67 kHz. So the L seems to be 3.8 H now. This is still not= enough. The l/d of the coil dimension becomes larger now, so i need more a= nd more wire to reach the final resonance frequency of 2.97 kHz at about 50= 0 pF. I will do a next test on the actual resonance frequency in some days, when = the WX permits. I will also check where the resonance can be found when swi= tching the small coil in series that i use for 6.47 kHz now. It could be qu= ite close to 2.97 kHz then! So maybe this allows a next QRO step on 2.97 kH= z: 100 mA antenna current must be reached for the planned experiment in 65 = km distance. BTW the 4 stack coil is wound out of almost 4 kg of enameled Cu wire with 0= .4 mm diameter. The layers are isolated by Kapton tape. My assumption is th= at it will hold 20 kV now. Ah and the DC resistance is 445 Ohm now. When connecting 275 V AC / 50 Hz, = i can measure 269 mA. So the actual inductance is 2.93 H (beeing farer away= from the self resonance frequency) I can tell you it's quite fascinating to operate down on these low frequenc= ies :-) To be continued... 73, Stefan/DK7FC ________________________________ No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7797 / Virus Database: 4656/13159 - Release Date: 10/06/16 --_000_DB6PR1001MB1320EFB10A8F796E839E000FECD90DB6PR1001MB1320_ Content-Type: text/html; charset="iso-8859-1" Content-ID: <6CEB26D44C75B94B9FE51257C177BB05@EURPRD10.PROD.OUTLOOK.COM> Content-Transfer-Encoding: quoted-printable

Wow!   That's a coil!!! &nbs= p; 

 

With best regards

 

 

Jim

 

 

Dr. Jim Cowburn

 

Tel.    01767 600522

Mob.  07967 300152<= /font>

= jim.cowburn@outlook.com

https:= //uk.linkedin.com/in/jamescowburn

  =

 

This email is sent from the account of Dr. James = Cowburn and is strictly confidential and intended solely for the addressee(s).If you are not the i= ntended recipient of this email you must: (i) not disclose, copy or distrib= ute its contents to any other person nor use its contents in any way or you= may be acting unlawfully; (ii) contact Dr. Cowburn immediately on +44 (0)1767 600522 quoting the= the addressee then delete it from your system.  I have taken reasonab= le precautions to ensure that no viruses are contained in this email, but d= o not accept any responsibility once this email has been transmitted. You sho= uld scan attachments (if any) for viruses.

 

 

From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus Vester Sent: 08 October 2016 13:25<= br> To: rsgb_lf_group@blacksheep.org
Subject: Re: ULF: A new step= on the large ULF coil...

 

...she's a Beauty! Yes, I also t= hink the idea of augmenting the new stacked coil with t= he yoghurt-coil should work well. The mutual coupling will help to increase the inductance, and you can fine-= tune by adjusting the vertical position. With the votage shared between the= two coils, you could comfortably run > 0.25 A at 2.97 kHz, 15 dB&n= bsp;more than your last ULF experinment. This might well be strong enough to be detected in Todmorden.

Best 73,
Markus




-----Urspr=FCngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.= org>
Verschickt: Sa, 8 Okt 2016 1:32 am
Betreff: ULF: A new step on the large ULF coil...

Hi ULF,

This night i have completed the 4th stack of my large ULF loading coil.
An image: https://dl.dropboxusercontent.com/u/19882028/ULF/= 20161008_ULF_TX_coil.jpg

The exciting question was, what is the new resonance frequency together wit= h my antenna. In the lab i put an equivalent C in parallel and found the re= sonance peak at 3.67 kHz. So th= e L seems to be 3.8 H now. This= is still not enough. The l/d of the coil dimension becomes larger now, so = i need more and more wire to reach the final resonance frequency of 2.97 kH= z at about 500 pF.

I will do a next test on the actual resonance frequency in some days, when = the WX permits. I will also check where the resonance can be found when swi= tching the small coil in series that i use for 6.47 kHz now. It could be qu= ite close to 2.97 kHz then! So maybe this allows a next QRO step on 2.97 kHz: 100 mA antenna current must be re= ached for the planned experiment in 65 km distance.

BTW the 4 stack coil is wound out of almost 4 kg of enameled Cu wire with 0= .4 mm diameter. The layers are isolated by Kapton tape. My assumption is th= at it will hold 20 kV now.
Ah and the DC resistance i= s 445 Ohm now. When connecting 275 V AC / 50 Hz, i can measure 2= 69 mA. So the actual inductance is 2.93 H (beeing = farer away from the self resonance frequency)

I can tell you it's quite fascinating to operate down on these low frequenc= ies :-) To be continued...

73, Stefan/DK7FC

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7797 / Virus Database: 4656/13159 - Release Date: 10/06/16<= o:p>

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