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Old 27th June 2011, 02:33 AM   #51
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Calculating Creepage and Clearance Early Avoids
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Old 27th June 2011, 05:31 PM   #52
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Quote:
Originally Posted by marce View Post
Again for creepage and clearance refer to the relevent spec, for Europe mains the spacing is 4mm clearance and 8mm creepage, this is between any copper feature. There are no rules of thumb and 1mm per 100V is wrong.
The relevant spec is EN 60664-1. Table F.1 in the following link shows the relevant distances. Equipment for home audio can be considered pollution degree 2. Material group III is the worst case and from 150 V to 1000 V it shows 1 mm creepage per 100 V.

Quote:
Originally Posted by marce View Post
European mains is not 230 but 253 for these calculations.
Treat it as if it was 300 V and make the air gap 3 mm to get a healthy safety margin.
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Old 3rd July 2011, 03:57 PM   #53
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Everybody is good!
Thanks the suggestion which everybody proposed.
After a half year development and the revision,Today was the last test.
Was makes the cabinet.
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Old 23rd July 2011, 12:35 PM   #54
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Old 6th September 2011, 03:58 PM   #55
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Old 8th September 2011, 01:51 PM   #56
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Great Work !!!!!

jer
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Old 19th September 2011, 04:41 PM   #57
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Thank you!
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Old 9th October 2011, 06:17 PM   #58
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Old 12th October 2011, 12:13 PM   #59
yatgai is offline yatgai  India
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Location: Goa India
Default VU meters

can you please share schematic for the VU meters ?
I am thinking of making one for my LM 3886 amp
Thanks & Regards
Yatin
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