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=-2.1 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,HTML_50_60,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 u3TBDqBv003702 for ; Fri, 29 Apr 2016 13:13:52 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aw6JQ-0008Fp-Np for rs_out_1@blacksheep.org; Fri, 29 Apr 2016 12:10:20 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aw6JQ-0008Fg-9Y for rsgb_lf_group@blacksheep.org; Fri, 29 Apr 2016 12:10:20 +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 1aw6JM-000428-Pl for rsgb_lf_group@blacksheep.org; Fri, 29 Apr 2016 12:10:19 +0100 Received: from servigilant.vigilant.local ([87.216.178.132]) by vigilant.es with MailEnable ESMTP; Fri, 29 Apr 2016 13:09:24 +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; Fri, 29 Apr 2016 13:09:59 +0200 From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: Paint buckets as coil forms Thread-Index: AdGh9MPC4uu/Vk9bR4+dLGwzndI9VP///LsA///aIrA= Date: Fri, 29 Apr 2016 11:09:58 +0000 Message-ID: <579355A36AEE9D4FA555C45D556003AB53B7946D@servigilant.vigilant.local> In-Reply-To: <57233AB2.3010504@lineone.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: 92b6515a4252c45136e975e6745a1e0d Subject: RE: LF: Paint buckets as coil forms Content-Type: multipart/alternative; boundary="_000_579355A36AEE9D4FA555C45D556003AB53B7946Dservigilantvigi_" 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: 7915 --_000_579355A36AEE9D4FA555C45D556003AB53B7946Dservigilantvigi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Warren. That's a perfect song for the job ! :-) https://www.youtube.com/watch?v=3DW4ga_M5Zdn4 Thank you for the ideas Hugh Yes, I have also some doubts about the quality of the plastic to last in UV= light. But this is relatively easy to solve with another container covering it all or as you propose, some spray coating for that purpose For multilayer I was thinking about the Pyramidal Wound technique described= at Rik page http://www.strobbe.eu/on7yd/136ant/#CoilLosses Looks complex to manage with a thin wire. I made a two layer coil with 1.5m= m2 wire using this technique and the thick of the wire helps a lot to keep turns in place. Thinner wire may be doable with much more layers ..= ... may be ? 73 de Luis EA5DOM ________________________________ De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blackshe= ep.org] En nombre de LineOne Enviado el: viernes, 29 de abril de 2016 12:43 Para: rsgb_lf_group@blacksheep.org Asunto: Re: LF: Paint buckets as coil forms Hello Luis. Medium and large paint containers are usually slightly tapered to maximise = storage space when empty and the plastic is generally polypropylene, someti= mes polyethylene. Using various sizes around the garden I found some are ve= ry durable in sunlight and some disintegrate within a year, these are proba= bly recycled plastic. Spraying them with paint could keep some UV light fro= m destroying them as the opaque ones seem to last longer. Why not go for multilayer windings to maximise the inductance? The containe= rs being tapered, it will require sticking tape over each layer, especially= if there is a high voltage present. Hugh, M0DSZ. On 29/04/2016 09:54, VIGILANT Luis Fern=E1ndez wrote: Hi VLF In my run for "the copper thing" I called a friend which is in the industri= al painting He is going to provide me a couple of paint buckets 29cm diameter by 31cm h= igh I plan to test a couple of coils with 0.4mm enameled copper using this buck= ets as forms If it is not the best idea, please tell me before doing it that way >From the coil calculators I can estimate 750 turns for a single layer coil = which would be about 105mH The buckets can be plugged one inside the other. Similar as Markus/Stefan Y= ogourt containers Can this stacking provide an increase of inductance ?? Something aprox to h= ave a multi layer coil ? Not counting any help from ferrite cores dopping .... I'm afraid that more = than eight bucket coils will be needed to reach over 800mH. A lot of copper wire and time to wound it indeed Multi layer winding with 0.4mm wire looks like something really hard for me= . Don=B4t know it ir really worths the effort Any ideas for a proper music track during the winding process ?? Spherics p= erhaps ? ;-) 73 de Luis EA5DOM --_000_579355A36AEE9D4FA555C45D556003AB53B7946Dservigilantvigi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Warren. That's a perfect song for= the job ! :-)
 
Thank you for the ideas Hugh
Yes, I have also some doubts abou= t the quality of the plastic to last in UV light. But this is relatively ea= sy to solve with another container
covering it all or as you propose= , some spray coating for that purpose
 
For multilayer I was thinking abo= ut the Pyramidal Wound technique described at Rik page http://www.strob= be.eu/on7yd/136ant/#CoilLosses
Looks complex to manage with a th= in wire. I made a two layer coil with 1.5mm2 wire using this technique and = the thick of the wire helps a lot
to keep turns in place. Thinner w= ire may be doable with much more layers ..... may be ?
 
73 de Luis
EA5DOM

De: owner-rsgb_lf_group@blacksheep.= org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de LineOne
Enviado el: viernes, 29 de abril de 2016 12:43
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: Paint buckets as coil forms

Hello Luis.

Medium and large paint containers are usually slightly tapered to maximise = storage space when empty and the plastic is generally polypropylene, someti= mes polyethylene. Using various sizes around the garden I found some are ve= ry durable in sunlight and some disintegrate within a year, these are probably recycled plastic. Spraying = them with paint could keep some UV light from destroying them as the opaque= ones seem to last longer.
Why not go for multilayer windings to maximise the inductance? The containe= rs being tapered, it will require sticking tape over each layer, especially= if there is a high voltage present.

Hugh, M0DSZ.

On 29/04/2016 09:54, VIGILANT Luis Fern=E1nd= ez wrote:
Hi = VLF
 
In = my run for "the copper thing" I called a friend which is in the i= ndustrial painting
He = is going to provide me a couple of paint buckets 29cm diameter by 31cm high=
I p= lan to test a couple of coils with 0.4mm enameled copper using this buckets= as forms
If = it is not the best idea, please tell me before doing it that way
 
Fro= m the coil calculators I can estimate 750 turns for a single layer coil whi= ch would be about 105mH
The= buckets can be plugged one inside the other. Similar as Markus/Stefan Yogo= urt containers
 
Can= this stacking provide an increase of inductance ?? Something aprox to have= a multi layer coil ?
Not= counting any help from ferrite cores dopping .... I'm afraid that more tha= n eight bucket coils will be needed
to = reach over 800mH. A lot of copper wire and time to wound it indeed
 
Mul= ti layer winding with 0.4mm wire looks like something really hard for me. D= on=B4t know it ir really worths the effort
 
Any= ideas for a proper music track during the winding process ?? Spherics= perhaps ? ;-)
 
73 de Luis
EA5DOM

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