From: graham foulkes <bespoken1@gmail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Wed, 15 Jul 2020 10:57:46 -0700
Subject: Re: [EE] Microwave Oven Transformers
Thread-Topic: [EE] Microwave Oven Transformers
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HI
120 amp windings at low voltage, you don't need thick insulation on the
wire. Maybe strip off the house cable insulation and lap wind with thin
tape, electronic polyamide high temperature tape preferrably. I have used
thin cotton tape to insulate scondary coils in a home built welder, still
running 30 years later.
Shellac lacquer is also an alternative, does not soften much with
temperature increase and has good dielectric properties. Avoid PVC
electrical tape, softens too easily and punctures when winding, stretches
and so thins out.

On Wed, Jul 15, 2020, 7:38 AM Bob Blick <bobblick@outlook.com> wrote:

> That's pretty nice! I guess I shouldn't give up on finding a source for
> enameled wire. I will start with my current plan and see how much
> inductance I get, since I have lots of house wire.
> Thanks, Bob
>
> ________________________________________
> From: piclist-bounces@mit.edu <piclist-bounces@mit.edu> on behalf of
> sergio
> Sent: Wednesday, July 15, 2020 10:13 AM
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE] Microwave Oven Transformers
>
> https://www.wires.co.uk/acatalog/TX_3000-5000.html
>
> On Wed, 15 Jul 2020, Bob Blick wrote:
>
> > I know the insulation of house wire will waste as much space as the
> copper, but that's the way it is. It's hard to find thick enameled wire,
> and it would be very hard to wind 8AWG or thicker wire.
>
> A good place for wire:
>
> https://www.wires.co.uk/acatalog/TX_3000-5000.html
>
> They used to do much more so I guess they can get hold of a lot more than
> they advertise.
>
> Best Regards
> Sergio
> -
>
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