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=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,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 u3TAlawt003658 for ; Fri, 29 Apr 2016 12:47:36 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aw5tJ-000874-D8 for rs_out_1@blacksheep.org; Fri, 29 Apr 2016 11:43:21 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aw5tI-00086v-SY for rsgb_lf_group@blacksheep.org; Fri, 29 Apr 2016 11:43:20 +0100 Received: from smtpout.karoo.kcom.com ([212.50.160.34]) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1aw5tH-0003rn-4l for rsgb_lf_group@blacksheep.org; Fri, 29 Apr 2016 11:43:19 +0100 X-IronPort-AV: E=Sophos;i="5.24,551,1454976000"; d="scan'208,217";a="161778790" Received: from unknown (HELO [127.0.0.1]) ([109.176.201.106]) by smtpout.karoo.kcom.com with ESMTP; 29 Apr 2016 11:43:16 +0100 Message-ID: <57233AB2.3010504@lineone.net> Date: Fri, 29 Apr 2016 11:42:58 +0100 From: LineOne User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Thunderbird/31.1.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <579355A36AEE9D4FA555C45D556003AB53B791DC@servigilant.vigilant.local> In-Reply-To: <579355A36AEE9D4FA555C45D556003AB53B791DC@servigilant.vigilant.local> X-Scan-Signature: 18c0ce4cbca80559a8b22b14cd653174 Subject: Re: LF: Paint buckets as coil forms Content-Type: multipart/alternative; boundary="------------070303010606010309060302" 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: 7914 This is a multi-part message in MIME format. --------------070303010606010309060302 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hello Luis. Medium and large paint containers are usually slightly tapered to maximise storage space when empty and the plastic is generally polypropylene, sometimes polyethylene. Using various sizes around the garden I found some are very 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 containers 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 Fernández wrote: > Hi VLF > In my run for "the copper thing" I called a friend which is in the > industrial painting > He is going to provide me a couple of paint buckets 29cm diameter by > 31cm high > I plan 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 > 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 Yogourt 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 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´t know it ir really worths the effort > Any ideas for a proper music track during the winding process ?? > Spherics perhaps ? ;-) > 73 de Luis > EA5DOM --------------070303010606010309060302 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit Hello Luis.

Medium and large paint containers are usually slightly tapered to maximise storage space when empty and the plastic is generally polypropylene, sometimes polyethylene. Using various sizes around the garden I found some are very 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 containers 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 Fernández wrote:
Hi VLF
 
In my run for "the copper thing" I called a friend which is in the industrial painting
He is going to provide me a couple of paint buckets 29cm diameter by 31cm high
I plan 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
 
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 Yogourt 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 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´t 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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