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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 3rd January 2012, 12:29 AM   #1
jrenkin is offline jrenkin  United States
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Default mosfet failure

How would one know if they had a mosfet fail?
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Old 3rd January 2012, 12:36 AM   #2
nigelwright7557 is offline nigelwright7557  United Kingdom
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Quite often they go short circuit from drain to source.
Check it with a multimeter on the ohms setting.

I have seen a gate to source short as well but only once.
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Old 3rd January 2012, 06:15 PM   #3
jrenkin is offline jrenkin  United States
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thank you
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Old 6th January 2012, 06:19 PM   #4
jrenkin is offline jrenkin  United States
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I measure 17K ohms across the d-s for a disconnected never used 2sk3563, the same as my used ones, when disconnected. Does that seem right?
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Old 6th January 2012, 06:39 PM   #5
rknize is offline rknize  United States
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Google for it. There are a few simple techniques to test the gates.
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Old 25th April 2013, 08:54 PM   #6
piano3 is offline piano3  United Kingdom
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can one fail drain to gate?
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