Return-Path: X-Spam-DCC: paranoid 1233; Body=3 Fuz1=3 Fuz2=3 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_RCVD_HELO,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 u3BEs5rB006547 for ; Mon, 11 Apr 2016 16:54:05 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1apd9S-0003Rw-BG for rs_out_1@blacksheep.org; Mon, 11 Apr 2016 15:49:18 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1apd9R-0003Rn-Vx for rsgb_lf_group@blacksheep.org; Mon, 11 Apr 2016 15:49:17 +0100 Received: from s16315160.onlinehome-server.info ([87.106.80.234] helo=mail.vigilant.es) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1apd9O-0007Wp-EP for rsgb_lf_group@blacksheep.org; Mon, 11 Apr 2016 15:49:16 +0100 Received: from servigilant.vigilant.local ([87.216.178.132]) by vigilant.es with MailEnable ESMTP; Mon, 11 Apr 2016 16:48:57 +0200 Received: from servigilant.vigilant.local ([fe80::3cdf:95f8:c1c9:3931]) by servigilant.vigilant.local ([fe80::3cdf:95f8:c1c9:3931%13]) with mapi id 14.03.0123.003; Mon, 11 Apr 2016 16:48:58 +0200 From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: EA in LF soon Thread-Index: AdGT0UuIIJFOKnhuQCCLK85AkRDb8AAE0laAAAZwcyA= Date: Mon, 11 Apr 2016 14:48:57 +0000 Message-ID: <579355A36AEE9D4FA555C45D556003AB53B65A9E@servigilant.vigilant.local> In-Reply-To: <1915905512.1234531.1460381013653.JavaMail.open-xchange@oxbe17.tb.ukmail.iss.as9143.net> Accept-Language: es-ES, en-US Content-Language: es-ES X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.0.2] MIME-Version: 1.0 X-Scan-Signature: 3f96c9ff152a6a60cc2344b4cc7e7dd2 Subject: RE: LF: EA in LF soon Content-Type: multipart/alternative; boundary="_000_579355A36AEE9D4FA555C45D556003AB53B65A9Eservigilantvigi_" 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: O X-Status: X-Keywords: X-UID: 7655 --_000_579355A36AEE9D4FA555C45D556003AB53B65A9Eservigilantvigi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Dave, Stefan, LF ! :-) Well, the big coil (double layer) is wound in the right sense, as CCW. Just= as the other coils But unfortunately it is wound top to bottom, and the coils in the pipe are = wound bottom to top Reversing the plastic bucket I would place both coil winds bottom to top bu= t in opposite senses (inner CCW outer CW) which I'm afraid would not work either. Right ? Effectively this makes the fields to cancel when you get one into the other= . Already tested ! :( Taking the last coil appart will be probably the best option. Can rewind th= e second coil, which would be the easier way to get both coils coupled, but Q will reduce with coupled coils and seems I do not= need so much inductance to reach LF 73 de Luis EA5DOM ________________________________ De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blackshe= ep.org] En nombre de DAVE PICK Enviado el: lunes, 11 de abril de 2016 15:24 Para: rsgb_lf_group Asunto: Re: LF: EA in LF soon Luis Good job! But if the top coil is wound the wrong way it will be subracting from the m= ain coil. Move it away from it, maybe stand it on something else a metre away, this w= ill reduce the mutual coupling and increase the total inductance. If it had been would the same way, as Stefan said, moving it closer would i= ncrease the inductance - but as it is the wrong way it decreases! 73 Dave G3YXM On 11 April 2016 at 10:05 VIGILANT Luis Fern=E1ndez wrot= e: Hi LF My progress to get access to LF: Added a coil on top of the 300mm pipe. With this in series can reach resona= nce at 270KHz https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/IMG_20160409_= 183709.jpg https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/sark_029.bmp Then added another coil. Two layers winding, reaching 152KHz https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/IMG_20160411_= 093327.jpg https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/sark_031.bmp I'm afraid I winded "the wrong way" to get it working as yougurt cup over t= he top coil. Will try to reverse it. Anyway a convenient fixing (not the one shown in picture) can b= e made keeping one over the other Next is to play with top load capacitive wires to increase capacity and get= it down to 137KHz .....keep tuned ! ;-) 73 de Luis EA5DOM --_000_579355A36AEE9D4FA555C45D556003AB53B65A9Eservigilantvigi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Dave, Stefan, LF ! :-)<= /span>
 
Well, the big coil (double layer)= is wound in the right sense, as CCW. Just as the other coils=
But unfortunately it is wound top= to bottom, and the coils in the pipe are wound bottom to top=
Reversing the plastic bucket I wo= uld place both coil winds bottom to top but in opposite sens= es (inner CCW outer CW)
which I'm afraid would not work e= ither. Right ?
 
Effectively this makes the fields= to cancel when you get one into the other. Already tested !   :(=
 
Taking the last coil ap= part will be probably the best option. Can rewind the second coil, which wo= uld be the easier way to get
both coils coupled, but Q will re= duce with coupled coils and seems I do not need so much inductance to reach= LF
 
73 de Luis
EA5DOM
 

De: owner-rsgb_lf_group@blacksheep.= org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DAVE PICK
Enviado el: lunes, 11 de abril de 2016 15:24
Para: rsgb_lf_group
Asunto: Re: LF: EA in LF soon

Luis


Good job!

But if the top coil is wound the wrong way it will be subracting from th= e main coil.

Move it away from it, maybe stand it on something else a metre away, thi= s will reduce the mutual coupling and increase the total inductance.

If it had been would the same way, as Stefan said, moving it closer woul= d increase the inductance - but as it is the wrong way it decreases!

73


Dave G3YXM


On 11 April 2016 at 10:05 VIGILANT Luis Fern=E1nd= ez <luis@vigilant.es> wrote:

Hi LF
 
My progress to get access to LF= :
 
Added a coil on top of the= 300mm pipe. With this in series can reach resonance at 270KHz
 
Then added another coil. Two la= yers winding, reaching 152KHz
 
I'm afraid I winded "the w= rong way" to get it working as yougurt cup over the top coil. Will try= to
reverse it. Anyway a convenient= fixing (not the one shown in picture) can be made keeping one over the oth= er
 
Next is to play with top load c= apacitive wires to increase capacity and get it down to 137KHz
 
.....keep tuned ! ;-)
 
73 de Luis
EA5DOM
 
 


 

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