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=-1.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,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 t41BB8mF014854 for ; Fri, 1 May 2015 13:11:08 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Yo8jP-0003Zl-SD for rs_out_1@blacksheep.org; Fri, 01 May 2015 12:03:43 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Yo8jP-0003Zc-8x for rsgb_lf_group@blacksheep.org; Fri, 01 May 2015 12:03:43 +0100 Received: from s16315160.onlinehome-server.info ([87.106.80.234] helo=mail.vigilant.es) by relay1.thorcom.net with esmtp (Exim 4.85) (envelope-from ) id 1Yo8jN-0001Yt-4k for rsgb_lf_group@blacksheep.org; Fri, 01 May 2015 12:03:42 +0100 Received: from servigilant.vigilant.local ([87.216.178.132]) by vigilant.es with MailEnable ESMTP; Fri, 1 May 2015 13:03:16 +0200 Received: from servigilant.vigilant.local ([fe80::3cdf:95f8:c1c9:3931]) by servigilant.vigilant.local ([fe80::3cdf:95f8:c1c9:3931%17]) with mapi id 14.03.0123.003; Fri, 1 May 2015 13:03:24 +0200 From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= To: "rsgb_lf_group@blacksheep.org" Thread-Topic: questions about a tx square loop fpr 470KHz Thread-Index: AQHQg4wu6/tEMoFEOEOhJcMKZCaPtp1m8sqr Date: Fri, 1 May 2015 11:03:24 +0000 Message-ID: <579355A36AEE9D4FA555C45D556003AB1B0F9B56@servigilant.vigilant.local> References: <579355A36AEE9D4FA555C45D556003AB1B0F416E@servigilant.vigilant.local> <553FFAC1.7060609@gmail.com>, In-Reply-To: Accept-Language: es-ES, en-US Content-Language: es-ES X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [95.17.186.61] MIME-Version: 1.0 X-Scan-Signature: 87525734ac0bb319fb3f44295fe6963b Subject: LF: Re: questions about a tx square loop fpr 470KHz Content-Type: multipart/alternative; boundary="_000_579355A36AEE9D4FA555C45D556003AB1B0F9B56servigilantvigi_" 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: 3033 --_000_579355A36AEE9D4FA555C45D556003AB1B0F9B56servigilantvigi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ciao Sandro I'm not an expert at all, but as there is no answer from others and after s= eeing your picture I would not make a vertical loop that way. In my opinion it will be too clo= se to the terrace floor and the rest of the building What I have done is a horizontal loop and it works. If you can place 4 pole= s in the corners of the building shown in your picture (40mm plastic pipe 1,5m high) then you shoul= d get a bigger loop More than one turn can be better, or at least that's what I have read but n= ot tested Using the four corners of the buiding may be you can get 7m x 7m loop, and = if you make 2 turns vertically spaced may be you can get something working on 477KHz ??? 6mm copper wire can be too heavy and expensive. I used RG59 coax and it wor= ks. Cheap and light I prefer to spend the money in good capacitors That's my two cents ! ;-) 73 de Luis EA5DOM ________________________________ De: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org]= en nombre de IK1WVQ Mauro [ik1wvq@stmb.it] Enviado: jueves, 30 de abril de 2015 23:16 Para: rsgb_lf_group@blacksheep.org; rsgb_lf_group@blacksheep.org Asunto: LF: questions about a tx square loop fpr 470KHz 73 to all, I would like to know your opinion about this: I can made a square TX loop for 470KHz of 7 * 3 meters (see picture) in the= terrace of the building where I live (6 floors). the questions are: - it is enough a 6mmq copper electric wire ?? (20W is the output power of = my tx). - single turn or two turns spaced 10cm max ?? (two turns =3D less pF requi= red to take the resonance). - Is this a good idea to start to trasmit on 470KHz WSPR ?? thanks in advance for your attention. 73 de Mauro IK1WVQ ________________________________ [Avast logo] Questa e-mail =E8 stata controllata per individuare virus con Avast antivir= us. www.avast.com --_000_579355A36AEE9D4FA555C45D556003AB1B0F9B56servigilantvigi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ciao Sandro

I'm not an expert at all, but as there is no answer from others and af= ter seeing your picture
I would not make a vertical loop that way. In my opinion it will be to= o close to the terrace floor
and the rest of the building

What I have done is a horizontal loop and it works. If you can place 4= poles in the corners of the
building shown in your picture (40mm plastic pipe 1,5m high) then you = should get a bigger loop
More than one turn can be better, or at least that's what I have read = but not tested
Using the four corners of the buiding may be you can get 7m x 7m loop,= and if you make 2 turns
vertically spaced may be you can get something working on 477KHz ???

6mm copper wire can be too heavy and expensive. I used RG59 coax and i= t works. Cheap and light

I prefer to spend the money in good capacitors

That's my two cents ! ;-)

73 de Luis
EA5DOM

De: owner-rsgb_lf_group@blacksheep.org [o= wner-rsgb_lf_group@blacksheep.org] en nombre de IK1WVQ Mauro [ik1wvq@stmb.i= t]
Enviado: jueves, 30 de abril de 2015 23:16
Para: rsgb_lf_group@blacksheep.org; rsgb_lf_group@blacksheep.org
Asunto: LF: questions about a tx square loop fpr 470KHz


73 to all,

I would like to know your opinion about this:

I can made a square TX loop for 470KHz of 7 * 3 meters (see picture) in the= terrace of the building where I live (6 floors).

the questions are:

- it is enough a 6mmq copper electric wire ??  (20W is the output powe= r of my tx).
- single turn or two turns spaced 10cm max ?? (two turns =3D  less pF = required to take the resonance).
- Is this a good idea to start to trasmit on 470KHz WSPR ??

thanks in advance for your attention.

73 de Mauro IK1WVQ



3D"Avast

Questa e-mail =E8 stata controllata per individuare virus con Avast antivir= us.
www.avast.com


--_000_579355A36AEE9D4FA555C45D556003AB1B0F9B56servigilantvigi_--