Variac

[Multi-Volti]

I read once that there is such a thing as a variable autotransformer
with isolation, but I have never seen one. Maybe it's an isolation
transformer and var. autotransformer in one box.

Murray

Mark Hughes wrote:
>
> >The Variac can provide isolation (as in DC isolation), however it has been my
> >experience that Variac can cause some noise at various harmonics. This noise
> >is usually very slight. Most Variacs have some current limiting properties.
> >So what this means is if you isolate after the Variac you will eliminate more
> >noise and cause less current loss.
> >73's Mike  KG6DXN,PGGB018124
>
> Variac's (AKA autotransformers DO NOT PROVIDE ELECTRICAL ISOLATION!!!
> Mark Hughes  WB4UHI
>
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