power supply for Mosfet matching

russbryant · 12th November 2002, 02:33 AM

Would the power supply from my old computer be OK to use for matching Mosfet's? Too noisy ?

Thanks,

Russ

halojoy · 12th November 2002, 02:42 AM

I do not think noise is any trouble.
It is not as much noise in them as you might think.

jackinnj · 12th November 2002, 02:47 AM

Your PC power supply requires a minimum load to "regulate" the output.

Just buy an Heathkit IP27 on EBay -- more than adequate for the task.

dlharmon · 12th November 2002, 08:04 PM

Just put a 5ohm 5W resistor across the 5V output and that will take care of the 1A minimum load. The other outputs usually don't have a minimum load. I used a computer power supply with just that resistor for a few years, and It worked great. Now I am building a diy power supply from my SOZ. (I couldn't take the heat so I built a pair of zen's)

The output ground, case and input ground are all tied together so don't try chaining unmodified supplies. (Yes I have stacked these things)

Darrell Harmon

12th November 2002, 02:33 AM	#1
russbryant diyAudio Member Join Date: Oct 2002 Location: Tucson, AZ	power supply for Mosfet matching Would the power supply from my old computer be OK to use for matching Mosfet's? Too noisy ? Thanks, Russ

12th November 2002, 02:42 AM	#2
halojoy On Hiatus Join Date: Nov 2002	what is the specifications? Volts/Amp I do not think noise is any trouble. It is not as much noise in them as you might think.

12th November 2002, 08:04 PM	#4
dlharmon diyAudio Member Join Date: Nov 2001 Location: TN, USA	minimum load Just put a 5ohm 5W resistor across the 5V output and that will take care of the 1A minimum load. The other outputs usually don't have a minimum load. I used a computer power supply with just that resistor for a few years, and It worked great. Now I am building a diy power supply from my SOZ. (I couldn't take the heat so I built a pair of zen's) The output ground, case and input ground are all tied together so don't try chaining unmodified supplies. (Yes I have stacked these things) Darrell Harmon __________________ http://gemini.tntech.edu/~dlh5678

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12th November 2002, 02:47 AM	#3
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Your PC power supply requires a minimum load to "regulate" the output. Just buy an Heathkit IP27 on EBay -- more than adequate for the task.

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