Using a pair of transformers in a full-wave center-tapped
configurations is really making two parallel half wave supplies. The
problem is that the flux in the core can not reverse direction thus
limiting the peak to peak flux in the core. This will seriously limits the
peak current that can be drawn. The core becomes permanently magnetized and
possibly saturate if too much current is dawn.
The transformers from the larger microwave ovens should be able to
produce considerably over a kW due to the fact that the magnetron output is
typically 1500 watts and they are not 100% efficient.
73
Bill wa4lav
At 08:48 AM 3/13/2006 -0500, you wrote:
>Dan_K9ZF wrote:
> > Tony,
> > How do you think a pair of the MOT's would hold up? I've been planning
> > to build a power supply like the one you put together, only using a pair
> > of trannys in parallel. This would be set up to drive a pair of GI7b's,
> > hopefully.... Been in the planning stages for a couple of years now,
> hi hi.
> >
> > 73
> > Dan
>
>I see no problem using a pair of them. In fact, it makes it easier if
>you want to run a full wave center tapped HV supply. I would still pull
>the grounded end off the ground lug and bring the junction of the two
>out as B- which you probably do not want right at ground potential but
>it should work fine. It also gives you the option to run the primaries
>in series on 240V if you wanted to. This takes us back to a previous
>transformer discussion ;)
>
>73, Tony W4ZT
>
><snip>
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