[sdiy] Gapped vs. Ungapped Transformers?

[Tim Ressel]

Hey,

Also gapped cores, as well as solenoid-style cores,
will have a larger magnetic field surrounding them.
This means anything nearby that is magnetic in nature
can be affected. 

--Tim


--- harrybissell <harrybissell at prodigy.net> wrote:
> Hi Tim
> 
> an ungapped transformer has a complete magnetic flux
> path through the
> core...
> very efficient but saturates easily.
> 
> Gapping the core (a small gap) allows flux to 'leak'
> out.. allowing the
> tranformer
> to work almost as well at low currents, and able to
> survive higher
> currents as well.
> The transformer coils work like an iron core at low
> levels and (sort of)
> more like
> an air core at high levels...
> 
> Gapped cores are hard(er) to saturate.  DC will
> saturate a
> transformer... even faster
> with an ungapped core.
> 
> H^) harry
> 
> Tim Curtis wrote:
> 
> > Hi Everyone -
> >
> > I've got a transformer question...
> >
> > What does it mean when transformers are "gapped"
> or "ungapped"?  I'm
> > wondering about an audio output transformer. 
> There are two of them
> > listed at exactly the same specs but one is marked
> "gapped" and the
> > other marked "ungapped - no d.c."
> >
> > Anybody care to share their insights?  I'm not a
> transformer person.
> >
> > Thanks,
> >
> > Tim
> 


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