Re: +/- 18VDC PS basic questions


"DBLEXPOSURE" <celstuff@xxxxxxxxxxx> wrote in message
news:0aKdncaptJetD__eRVn-iA@xxxxxxxxxxxx
>
> If you can't look at the schematic you can use an Ohm Meter. The center
tap
> will have a resistance to each of the other two ends. This would not be
> true of multiple secondary windings.
>
> Center tapped xformers have multiple applications. A full wave bridge
> rectifier requires a center tapped xformer. I believe old FM discrimators
> use center tapped xformers. Bipolar Power supplies is another example.
>
>
> Yours sounds more like either multiple taps or multiple windings. My
guess
> is multiple taps.
>
If it's multiple taps, would there necessarily BE a center tap? If so,
would it not be the highest voltage? Or is there just no way to tell.

Is it okay to use a transformer with the correct voltage rating but a larger
current rating? For example, I see a 18VAC 1A center-tapped transformer for
$18 at an online retailer, but I really only need 250mA.


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