I'm not sure how you are planning on using this transformer.  Is this a
one-up project or regular production?  What is the size of your load?

You should actually see improvements in noise (assuming you mean
mechanical noise from the transformer), heating and life expectancy.
Your load needs to draw no more current than the secondary was
originally rated for so, you will see a consequent reduction (to half)
of the original VA rating of the transformer (I'm assuming the
transformer is a single primary/single secondary type).  You should have
no problems with magnetic saturation (you are reducing the applied
volt-seconds).  The only real concern here is overtemping one of the
windings due to drawing too much current.

I'm not sure why Mike suggests you rewind the secondary.  While you
could regain the original VA rating by rewinding the transformer, you'd
have to rewind the primary as well.  If this is for a one-up and you
stay under 375VA you should be just fine.

Best regards,

Dave

Mike Singer wrote:
>
> Techhead wrote:
> > I have a transformer rated at 220 VAC primary, 24 VAC secondary @ 750
> > VA. I am looking for 12 VAC out so I will connect the 220 primary to
> 110
> > VAC and get the 12 output. I think I know the answer to this but wish
> to
> > avail myself of the experience and knowledge of others. I don't see
> > problems but was concerned with noise, heating, life expectancy etc.
> of
> > doing this.
>
>    Rewind the secondary, or find a new transformer.
>    The sort of a garbage is scattered here, there and
>  everywhere
>
>  Mike.
>
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