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power supply for Mosfet matching
power supply for Mosfet matching
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Old 12th November 2002, 02:33 AM   #1
russbryant is offline russbryant
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Default power supply for Mosfet matching

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


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Old 12th November 2002, 02:42 AM   #2
halojoy is offline halojoy  Sweden
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Default 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.
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Old 12th November 2002, 02:47 AM   #3
jackinnj is offline jackinnj  United States
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power supply for Mosfet matching
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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Old 12th November 2002, 08:04 PM   #4
dlharmon is offline dlharmon  United States
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Default 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
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