Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x1IEJ90Y002844 for ; Mon, 18 Feb 2019 15:19:17 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gvjgf-0005sl-Ho for rs_out_1@blacksheep.org; Mon, 18 Feb 2019 14:14:25 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gvjgW-0005sV-3R for rsgb_lf_group@blacksheep.org; Mon, 18 Feb 2019 14:14:16 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1gvjgU-0005Tl-7Z for rsgb_lf_group@blacksheep.org; Mon, 18 Feb 2019 14:14:14 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout01.posteo.de (Postfix) with ESMTPS id 60E8816005F for ; Mon, 18 Feb 2019 15:14:12 +0100 (CET) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1550499252; bh=luaNQX/e1YaqrSvf6YY3nirG8IkuZTYK/wkadyEHcQQ=; h=Date:From:To:Subject:From; b=XBp4M4lF0XVt5XlFTLaOYTVScrttFRmAllbTplGHdOK+94N7Rya2FPUFk/p8X3A+U PbZJXzGCwWYJsXS0nj34wHrKSC2CkLQmMPo3SmPwsuHzguPD9hz0etAVkFfU9d3wjS T9T+KPIUMuXtVHbM89emp/vXgjjalY3JdIMPe5wCWYiyP2ZBouQiT3smf+5sM1BjqS kPqTP7PtTxMexWzHlC88FoOeVKhiWKglIqXLZqbdW9W16A8LcwpbZavxkVAJjRRXhY j3du+2oUT7UdK4bGAl3e7mzzyEwDY0ehhsMiE5ksDixgHfPyjlhbt+z/OaRgHj9c3D PWsFAbw9S/7HA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4435TG2vGfz6tmL for ; Mon, 18 Feb 2019 15:14:09 +0100 (CET) Message-ID: <5C6ABDB1.7010209@posteo.de> Date: Mon, 18 Feb 2019 15:14:09 +0100 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: <168c41b89f6.marcocadeddu@tin.it> <5C5BE905.2010904@posteo.de> <5C5D8F53.1080409@posteo.de> <5C697B5E.4070609@posteo.de> <6DB8451D7F3D3947A5918808A59621EA31525C93@servigilant.vigilant.local> <5C6A62E2.9020506@posteo.de> <6DB8451D7F3D3947A5918808A59621EA3152609C@servigilant.vigilant.local> <2de2a5e1-850b-4c7e-f91e-7ddf618aa1f2@verizon.net> In-Reply-To: <2de2a5e1-850b-4c7e-f91e-7ddf618aa1f2@verizon.net> X-Spam-Score: -2.3 (--) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Maybe i can contribute something here: Luis' wire is 0.2 mm diameter, not 0.02 mm. I would recommend to use a bigger wire if you have enough space. 0.4 mm is much more comfortable to wind and it holds [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [185.67.36.65 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 617a5faed955112e448650f4d003a84d Subject: Re: LF: Tricotosa Rotory Table Content-Type: multipart/alternative; boundary="------------090709090604000101070205" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,HTML_FONT_BIG, HTML_MESSAGE autolearn=no version=2.63 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 This is a multi-part message in MIME format. --------------090709090604000101070205 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Maybe i can contribute something here: Luis' wire is 0.2 mm diameter, not 0.02 mm. I would recommend to use a bigger wire if you have enough space. 0.4 mm is much more comfortable to wind and it holds a 500 mA in a stacked configuration. If your motor is to fast, just try to switch a resistor in series. This has the advantage that the torque, or the force which pulls the wire is lower and you can manually regulate the motor speed by holding the wire a bit stronger/lighter. This has worked very well here. 73, Stefan Am 18.02.2019 14:49, schrieb Stan, W1LE: > > Hello Luis, > > Thanks for the update. I am in the midst of starting to think about > winding a loading > > coil for the 50 foot vertical in the front yard. > > What is the revolutions per minute of your rotary table ? > > What speed are you most comfortable with ? > > I am also thinking of a nested "bucket brigade" for a tunable loading > coil. > > My initial thought was to use a lathe and I built up a jig to > horizontally hold the 5 gallon plastic bucket. > > Unfortunately I could not get the speed low enough to allow me to > comfortably wind the single layer coil. > > The lathe has a DC motor and the DC drive board could not be adjusted > low enough. I think I need about > > 0-20 RPM. 0.02mm solid wire is about a #32 AWG or a #36 British WG, > rated at ~ 90 milliamperes. > > My initial thought was to use a wide double sticky tape at about 4 > locations on the bucket, about 90 degrees apart. > > I am also considering a tape over the entire coil after winding to > hold everything in place. > > Another thought is a clear UV proof epoxy over the entire coil, to > hold in place. > > My concern is the derating of the current due to the reduced > dissipation of heat in the covered coil. > > Back to the drawing board..... My coil winding will start with #22 AWG > from a 4.4 Kg spool. > > > Stan, W1LE Cape Cod FN41sr > > > > > On 2/18/2019 7:20 AM, VIGILANT Luis Fernández wrote: >> Hi Stefan, VLF >> >> The "Tricotosa" works nicely. Added a pedal to activate the motor, which is very useful >> >> >> --------------090709090604000101070205 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Maybe i can contribute something here:
Luis' wire is 0.2 mm diameter, not 0.02 mm.
I would recommend to use a bigger wire if you have enough space. 0.4 mm is much more comfortable to wind and it holds a 500 mA in a stacked configuration.
If your motor is to fast, just try to switch a resistor in series. This has the advantage that the torque, or the force which pulls the wire is lower and you can manually regulate the motor speed by holding the wire a bit stronger/lighter.
This has worked very well here.

73, Stefan

Am 18.02.2019 14:49, schrieb Stan, W1LE:

Hello Luis,

Thanks for the update. I am in the midst of starting to think about winding a loading

coil for the 50 foot vertical in the front yard.

What is the revolutions per minute of your rotary table ?

What speed are you most comfortable with ?

I am also thinking of a nested "bucket brigade" for a tunable loading coil.

My initial thought was to use a lathe and I built up a jig to horizontally hold the 5 gallon plastic bucket.

Unfortunately I could not get the speed low enough to allow me to comfortably wind the single layer coil.

The lathe has a DC motor and the DC drive board could not be adjusted low enough. I think I need about

0-20 RPM. 0.02mm solid wire is about a #32 AWG or a #36 British WG, rated at ~ 90 milliamperes.

My initial thought was to use a wide double sticky tape at about 4 locations on the bucket, about 90 degrees apart.

I am also considering a tape over the entire coil after winding to hold everything in place.

Another thought is a clear UV proof epoxy over the entire coil, to hold in place.

My concern is the derating of the current due to the reduced dissipation of heat in the covered coil.

Back to the drawing board..... My coil winding will start with #22 AWG from a 4.4 Kg spool.


Stan, W1LE   Cape Cod   FN41sr




On 2/18/2019 7:20 AM, VIGILANT Luis Fernández wrote:
Hi Stefan, VLF

The "Tricotosa" works nicely. Added a pedal to activate the motor, which is very useful
--------------090709090604000101070205--