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Old 20th August 2011, 06:38 PM   #1
ron944 is offline ron944  United States
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Default Testing High Voltage Regulator?

Hi, I am using an NTE238 as a replacemnet for a Motorola MJ12005 high voltage regulator. It is in a TO-3 case in the power supply for a Counterpoint preamp. Is there anyway to test if the regulator is good without destroying it.

Thanks,
Ron
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Old 20th August 2011, 06:41 PM   #2
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lightbulb in one of the ac wires leading to your PSU.
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Old 20th August 2011, 06:56 PM   #3
ron944 is offline ron944  United States
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I would like to test it out of the circuit as I keep blowing a 5 watt resistor as I bring the Variac up to 90 volts. Trying to isolate the cause.
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Old 21st August 2011, 06:46 AM   #4
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just place it before the variac, it should limit the current (glow brightly) when it encounters a problem... so the excess power has somewhere else to go to rather than your project.
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Old 14th December 2012, 03:12 AM   #5
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Ron944, did you ever solve your problems with your SA-3.1 power supply?
I am going to update mine soon and would love to get some insight from you
about your PS changes.

Mark
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