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Date: Wed, 15 Jul 2009 15:34:18 +0200
Subject: Re: Re: LF: Microwave oven transformers
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These special transformers need the magnetic bypass because a magnetron lo=
oks (as a load) like a Z diode.
So they are powered, more or less, with a constant current source rather=
 than a constant voltage source.

In other words, the "generator" (transformer) must have a large source imp=
edance, and that's what the magnetic bypass in the 'former does.

Cheers,
  Wolf .

----- original Nachricht --------

Betreff: Re: LF: Microwave oven transformers
Gesendet: Mi 15 Jul 2009 15:23:54 CEST
Von: "Ken"<ken.h.wright@btinternet.com>

> Hi.
> Not sure what they do, this was info from the person who sold them to me=
, he
>=20
> seemed to know a lot about themand using them in PSUs. Maybe someone in=
 this
>=20
> forum can write a short explanation for us.
>=20
> Ken
>=20
> 73deM0KHW
>=20
> ----- Original Message -----=20
> From: "Alberto di Bene" <dibene@usa.net>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Wednesday, July 15, 2009 2:08 PM
> Subject: Re: LF: Microwave oven transformers
>=20
>=20
> > Ken wrote:
> >
> >> I was informed that as they stand the voltage regulation is poor, to=
=20
> >> improve this the 'Core Shunts' should be removed, (these are laminati=
ons
>=20
> >> between the two stacks), removal of these 'shunts' also has the effec=
t of
>=20
> >> considerably increasing the magnetisation current.
> >
> > Just out of curiosity, what is the purpose of those magnetic shunts wh=
en=20
> > the
> > microwave oven transformers are used for their intended application ?
> >
> > 73  Alberto  I2PHD
> >
> >=20
>=20
>=20
>=20

--- original Nachricht Ende ----







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