Return-Path: X-Spam-DCC: paranoid 1233; 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=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_MESSAGE,RATWARE_GECKO_BUILD,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 u3BGVcc5006787 for ; Mon, 11 Apr 2016 18:31:38 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1apeeQ-0003o3-2C for rs_out_1@blacksheep.org; Mon, 11 Apr 2016 17:25:22 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1apeeP-0003nu-MZ for rsgb_lf_group@blacksheep.org; Mon, 11 Apr 2016 17:25:21 +0100 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1apeeN-0007oW-Js for rsgb_lf_group@blacksheep.org; Mon, 11 Apr 2016 17:25:20 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 5473320461 for ; Mon, 11 Apr 2016 18:25:17 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3qkFlx20Jlz5vMp for ; Mon, 11 Apr 2016 18:25:17 +0200 (CEST) Message-ID: <570BCFEC.6000400@posteo.de> Date: Mon, 11 Apr 2016 18:25:16 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <579355A36AEE9D4FA555C45D556003AB53B65A9E@servigilant.vigilant.local> In-Reply-To: <579355A36AEE9D4FA555C45D556003AB53B65A9E@servigilant.vigilant.local> X-Scan-Signature: d2a449809c9c1ff1983612d049372878 Subject: Re: LF: EA in LF soon Content-Type: multipart/alternative; boundary="------------060606050205040201070206" 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: 7657 This is a multi-part message in MIME format. --------------060606050205040201070206 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Hi Luis, Turning the bucket will solve your problem. Its like a variometer where you can add or substract L by turning the coil. But don't collect to much water in the bucket ;-) 73 from the tree! I forgot to take my netbook up here so now i cannot program the GPS module :-/ :-) Am 11.04.2016 16:48, schrieb VIGILANT Luis Fernández: > 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 but 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 the 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@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 > the main coil. > > Move it away from it, maybe stand it on something else a metre away, > this will reduce the mutual coupling and increase the total inductance. > > If it had been would the same way, as Stefan said, moving it closer > would increase the inductance - but as it is the wrong way it decreases! > > 73 > > > Dave G3YXM > > >> On 11 April 2016 at 10:05 VIGILANT Luis Fernández >> 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 >> 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 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 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 > > --------------060606050205040201070206 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Luis,

Turning the bucket will solve your problem. Its like a variometer where you can add or substract L by turning the coil.
But don't collect to much water in the bucket ;-)

73 from the tree!
I forgot to take my netbook up here so now i cannot program the GPS module :-/ :-)

Am 11.04.2016 16:48, schrieb VIGILANT Luis Fernández:
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 but 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 the 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@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 the main coil.

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

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

73


Dave G3YXM


On 11 April 2016 at 10:05 VIGILANT Luis Fernández <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 layers winding, reaching 152KHz
 
I'm afraid I winded "the wrong 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 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
 
 


 

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