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Chip Amps Amplifiers based on integrated circuits

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Old 18th September 2010, 09:42 PM   #1
jordyyy is offline jordyyy  United States
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Join Date: Feb 2010
Default Few gainclone questions

Can you make a cover or housing for the toroidal transformer? Like out of acrylic, if it has a metal top and bottom to it?

How much metal is needed for grounding? I am planing on making an acrylic enclosure for a lm3875, one enclosure for the transformers and recitfiers, and then 2 seperate small enclosures for the amps themselves. If I had metal on both sides of the transformers and then maybe a small piece of aluminum to mount the rectifiers to, could I ground everything to the aluminum piece?

What are the cables called (or where to I purchase), the power connectors cords to go from transformers/rectifiers box to amp box?
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Old 19th September 2010, 09:48 AM   #2
AndrewT is offline AndrewT  Scotland
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read this first.
Audio Component Grounding and Interconnection
Pay particular attention to the Safety aspects of the PE, Earth and Safety Earth.
This is very important and very relevant if you intend separating the transformer from the amplifier and made even worse if the enclosures are not connected to PE.
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Old 19th September 2010, 07:43 PM   #3
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You got it the wrong way round. You don't build a metal case to be able to ground something. You ground all metal parts that can be touched and can come into contact with dangerous voltage so that fuses are tripped should such a fault occur.
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Old 21st September 2010, 06:02 AM   #4
jordyyy is offline jordyyy  United States
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Thanks for the link, ill read it. I'm going to see how thick of aluminum the laser cutter at school can go through and maybe go that route.
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Old 21st September 2010, 10:11 AM   #5
AndrewT is offline AndrewT  Scotland
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The school hacksaw will cut through thicker aluminium.
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