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V-DAC Power Supply question.

Sorry for the question but I know nothing about power supplies.

Why are people using the Pyramid PSU which is 13.8 V and 2.5 A when the original PSU should be 12V 500mA?

And why is the Pyramid advertised as 12volts 3amp?

I need to upgrade the power supply (I have none atm) but I'm a bit confused about the voltage and amperage.
helloskinny
helloskinny OP
3 posts
 
thanks for the help!
pixelphoto
70 posts
 
So from what Almarg says, it would be safe to use the Pyramid PS-4KX.? Output voltage is still 13.8VDC and output current rating is 3/4A. And the V-DAC will regulate the current draw?

Marvin
almarg's avatar
almarg
9,670 posts
 
Concerning current:

The PS-4KX, with a 3 amp continuous current capability and a 4 amp short-term current capability, will be just as compatible with a load drawing less than 500 ma as the PS-3KX is. The load device (the V-DAC in this case) determines how much current is drawn, based on its design and on the applied voltage. Using a power supply that is capable of supplying more current than necessary (in this case, a lot more) won't hurt.

Concerning voltage:

I have no specific knowledge of the design of the V-DAC, but well-designed equipment that is nominally intended to work with a 12V supply will commonly also work reliably at 13.8V. And that is further evidenced in this case by the reports of successful use of the V-DAC with the Pyramid PSUs.

Regards,
-- Al
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