From: Alan Pearce <kiwiantipodean@googlemail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
Sender: "piclist-bounces@mit.edu" <piclist-bounces@mit.edu>
Date: Mon, 13 Jul 2020 12:51:07 -0700
Subject: Re: [EE] Microwave Oven Transformers
Thread-Topic: [EE] Microwave Oven Transformers
Thread-Index: AdZZUG6TGY1eRYwWShuLHykpWjORdw==
Message-ID:
 <CAHD638jCvKnkrguRBCf3dY4OhLdWjfSnPHnxR=Ds76X2u8qHfA@mail.gmail.com>
References:
 <BYAPR02MB4055907B481B158D04EA8552DC600@BYAPR02MB4055.namprd02.prod.outlook.com>
	<CADOfteeTrV+BKJRSJaiM_xu=OU-jkpVXe6SroVsoLyDmmfJrtQ@mail.gmail.com>
In-Reply-To:
 <CADOfteeTrV+BKJRSJaiM_xu=OU-jkpVXe6SroVsoLyDmmfJrtQ@mail.gmail.com>
Reply-To: Microcontroller discussion list - Public. <piclist@mit.edu>
Accept-Language: en-US
X-MS-Exchange-Organization-SenderIdResult: Pass
X-MS-Exchange-Organization-PRD: mit.edu
X-MS-TNEF-Correlator:
received-spf: Pass (protection.outlook.com: domain of googlemail.com
	designates 209.85.208.173 as permitted sender)
	receiver=protection.outlook.com; client-ip=209.85.208.173;
	helo=mail-lj1-f173.google.com;
dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed;	d=googlemail.com;
 s=20161025;
	h=mime-version:references:in-reply-to:from:date:message-id:subject:to;
 	bh=wzOoWkmniRsqqjxdwu1GQGYIQTPSLxy220b3nbraXTo=;
	b=DX+F8zo2nqr8Jm8Geq0C4zOgbEMGqk7IB2jgrV9s2muu0j6rVG//8RkwIBLS9ei3yE
	/wqw6YZNbnBaVIieYIEP0kQjtQgUXaUgk7UlsUr3z56J/fI7oyobOmzKKJEpFYpJdsPs
	rf9tTbBjdgXysvY33qG4lj92byEV/Ppnw1o4AWahkvKw3Hmpb1kvbPLy9JGETXN2R2Rn
	9avkSY0LvyfIwD8696F/qcrbwqlQU2p4m1bHohzT0G4jki1d0T6aBTwgA7h7o8aLgpll
	er+CRA30pvvijrgymyuxGHWW34pd4Xo1sqTZaD1cxPh67JLKKbWYDGxlrXY2m8wk+QW1	arBg==
authentication-results: spf=pass (sender IP is 209.85.208.173)
	smtp.mailfrom=googlemail.com; mit.edu;	dkim=pass (signature was verified)
	header.d=googlemail.com;mit.edu; dmarc=pass action=none
	header.from=googlemail.com;
errors-to: piclist-bounces@mit.edu
list-id: "Microcontroller discussion list - Public." <piclist.mit.edu>
list-post: <mailto:piclist@mit.edu>
x-beenthere: piclist@mit.edu
x-mailman-version: 2.1.6
x-received: by 2002:a2e:900a:: with SMTP id
 h10mr625840ljg.242.1594669878624; 	Mon, 13 Jul 2020 12:51:18 -0700 (PDT)
x-topics: [EE]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0

I would have thought that a DC choke would not want the E and I
laminations interleaved, rather an air gap to limit saturation of the
core.

On Mon, 13 Jul 2020 at 18:39, Denny Esterline <desterline@gmail.com> wrote:
>
> Personally, no. But the internet is full of people that have taken out th=
e
> secondary windings and wound on 2-3 turns of heavy wire to produce a spot
> welder.
> Google around a bit on DIY spot welder and I'm sure you find lots of peop=
le
> hacking up these transformers in interesting ways. Probably something
> relevant to be learned there.
>
>
> -Denny
>
> On Mon, Jul 13, 2020 at 9:23 AM Bob Blick <bobblick@outlook.com> wrote:
>
> > I am in need of a large DC choke and thinking about making one from a
> > microwave oven transformer. It appears that the E's and I's of the core=
 are
> > not interleaved so all I need to do is cut the weld holding the core
> > together and it should fall apart. Hopefully in just two pieces. Then I=
 can
> > strip out the windings, put my own winding on, and, most importantly,
> > sandwich a spacer so I have a gap (I said this was a DC choke).
> >
> > Anyone here ever play with microwave oven transformers at this level an=
d
> > learned any hard lessons?
> >
> > Thanks, Bob
> > --
> > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> > View/change your membership options at
> > http://mailman.mit.edu/mailman/listinfo/piclist
> >
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.