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Old 5th July 2012, 06:49 AM   #1
Puffin is offline Puffin  United Kingdom
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Default De-Lite grounding

I have built a De-Lite using the IXYS 20N Dep fets. I have made a sort of star grd on the module where the Power grd, speaker and input grd are connected together. Should I be getting hum? It sounds like 50/60Hz.
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Old 5th July 2012, 08:32 AM   #2
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more info , please

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Old 5th July 2012, 01:59 PM   #3
Puffin is offline Puffin  United Kingdom
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More info about what?

All grds are tied together in one place.
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Old 5th July 2012, 02:20 PM   #4
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Tried connecting the mains earth connection to your GND?
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Old 5th July 2012, 02:34 PM   #5
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I was just tryong to edit my post to say that at present the mains safety earth is not connected. I was under the impression that connencting mains earth to 0v might cause more problems?
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Old 5th July 2012, 02:35 PM   #6
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try it...
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Old 5th July 2012, 02:37 PM   #7
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I will
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Old 5th July 2012, 03:22 PM   #8
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Ground lines coming from a star can pick up xformer buzz. Try moving the wires to a different location if you can.
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Old 5th July 2012, 03:24 PM   #9
Puffin is offline Puffin  United Kingdom
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Quote:
Originally Posted by underwurlde View Post
try it...
Tried that - no difference
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Old 5th July 2012, 03:35 PM   #10
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Quote:
Originally Posted by cochleus View Post
Ground lines coming from a star can pick up xformer buzz. Try moving the wires to a different location if you can.
Space is tight. Where should they be moved to?
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