Same here. I have made filament transformers from old TV transformers by
removing the secondary windings and putting the filament winding over the
existing primary.
Not pretty but worked.
Manfred has a very nice site!
73
Gary K4FMX
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On Behalf Of Carl
> Sent: Tuesday, February 23, 2010 12:29 PM
> To: jtml@vla.com; amps@contesting.com
> Subject: Re: [Amps] Tranformer construction webpages
>
> I agree John, that is a first class presentation. Ive reused old power
> transformers way in the past for 4-1000A filament transformers and a few
> other tubes but nothing Id allow to be photographed (-;
>
> Carl
> KM1H
>
>
>
>
> ----- Original Message -----
> From: "John Lyles" <jtml@losalamos.com>
> To: <amps@contesting.com>
> Sent: Tuesday, February 23, 2010 12:17 PM
> Subject: [Amps] Tranformer construction webpages
>
>
> >I agree with Steve, Manfred's treatise on transformer construction is
> first
> >class. Loaded with very practical advice and it demonstrates that he
> has
> >much experience in making transformers. I only made one in my life,
> > in college at Virginia Polytechnic, as part of a lab course, we had to
> > make a small power transformer. Most of the guys (there were no girls
> in
> > that class!) couldn't get their winding on a bobbin without it falling
> off
> > the edges,
> > and for some reason I decided that a piece of tape across each layer,
> plus
> > putting glue (not varnish) in the ends to seal it tight would make it
> stay
> > together. Some patience needed also. Mine did work, transformation
> > correct, and I may have gotten
> > an A grade in that lab, but that's as far as my transformer design
> > experience went. But Manfred's website makes it look fun and - well,
> not
> > exactly easy - explains the sorts of tricks are needed to make a
> tight,
> > compact,
> > reliable and functional power transformer. Thanks for putting that
> > together and in the public domain.
> >
> > 73
> > John
> > K5PRO
> >
> >> Message: 3
> >> Date: Mon, 22 Feb 2010 22:12:28 EST
> >> From: K1SG@aol.com
> >> Subject: Re: [Amps] Transformer winding
> >> To: amps@contesting.com
> >>
> >> Manfred, your transformer winding page is a delight, loaded with good
> >> information.
> >> Thanks for the excellent information and practical suggestions!
> >> One question...I see your name in your postings, but never your
> callsign.
> >> What is it?
> >>
> >> Steve Gilbert
> >
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