On Apr 3, 2006, at 5:54 PM, anthony lordi wrote:
> Robert. I would not hesitate to use an adapter(transformer) with a  
> higher
> ampere rating than the device rating. Lower will result in  
> overheating the
> adapter, depending on how much, and may result in a lower output  
> voltage.
> However, I would hesitate to use an adapter with a higher voltage  
> rating.
> Some devices can tolerate + or - 10% voltage. Beyond that I'd be  
> skeptical
> unless the device was expendable. The polarity of the plug and  
> receptacle
> must match, as often devices are not protected against reverse  
> polarity. Do
> not use an ac adapter on a dc device or visa versa.  Tony.

So there are four variables for the output of a transformer:

1) type of current: AC vs DC, must match exactly
2) polarity: center + or center - ( DC only ), must match exactly
3) current: minimum for the device, but higher is OK
4) voltage: minimum for the device, but higher is OK but no more than  
10% more

Does that sum it up?  Or is there more to consider?

Regards,
- Robert
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