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Old 21st June 2005, 07:42 PM   #1
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Default First Gainclone - Help with Parts List

Hello,
Iíve read through the PDF user guide on chipamp.com (which was very helpful) and browsed this forum extensively. Before I order an LM3875 kit from BrianGT, I want to make sure I have the correct parts list. Could you all look over the list below and tell me if I am on the right track. Any changes, improvements, or less expensive options? I think this is the correct transformer. Have I left out anything? Iím also trying to anticipate cost. I've sourced all my parts from Parts Express to cut down on shipping, but I would be open to getting things elsewhere. This is my first gainclone and I have almost no experience with electronics. Any suggestions are welcomed.

Thanks,
Alex

1 Non-inverting LM3875 rev.3 Stereo Kit - $45
chipamp.com

1 Toroidal Transformer - $42.26
http://www.partsexpress.com/pe/showd...number=122-620

2 Binding Post Pairs - $8.25
http://www.partsexpress.com/pe/showd...umber=091-1250

2 RCA Black/Red Pair - $5.30 http://www.partsexpress.com/pe/showd...umber=091-1120

2 pair Spade Terminals - $5.00
http://www.partsexpress.com/pe/showd...number=091-315

1 Chassis Plug - $1.89
http://www.partsexpress.com/pe/showd...number=090-443

1 Pack 2A Fuse - $1.36
http://www.partsexpress.com/pe/showd...number=071-653

Additional Items -
-Internal Wires
-Solder
-Power Cord
-Heat Sink
-Heat Shrink
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Old 21st June 2005, 07:45 PM   #2
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It doesn't look like the binding posts would be insulated from the chassis....which might be an issue if it's a metal chassis.

Scott
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Old 21st June 2005, 07:53 PM   #3
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Default Re: First Gainclone - Help with Parts List

I think you want slow blow, and not fast blow fuses.

Here are some cheap insulated binding posts: http://www.partsexpress.com/pe/showd...umber=091-1140

-d
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Old 22nd June 2005, 04:29 AM   #4
homer09 is offline homer09  Canada
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your fuses are not compatible with your IEC socket. you need 5x20mm fuses for that socket, not 1-1/4" x 1/4".

start thinking about chasis = hardest part!

is this a true amp, or integrated? if you have two pairs of RCA's, you need a method of switching inputs.
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Old 22nd June 2005, 06:35 AM   #5
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Default Parts List

Thanks for pointing out some of my minor league errors. My plans are for a NON-integrated amp - the 2 pairs of RCAs was a typo. I also hadn't thought of the need for -insulated- binding posts.

Can anyone comment on the toroidal transformer? Is this the right one? Apex jr. has some much less expensive versions, but I don't know if they will work well.

As for the chassis, I've got some ideas. There's a plastics dealer down the street from me. "Have you considere a future career in plastics?" I'm thinking about picking up some of their scraps and making an acrylic Patek, with a metallized interior for shielding. Haven't quite figured that out yet. And where can I get a solid copper bar out of a trash can...

Thanks
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Old 22nd June 2005, 10:44 AM   #6
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That tranny will work fine. For a little more umph you could go to the Avel 330VA 2x25v. Five mo' dolla's.
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Old 25th June 2005, 02:46 PM   #7
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Quote:
Originally posted by chipco3434
Five mo' dolla's.
Not to be a stickler on the spzellin', but it should be dollaz.

Kzofi
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Old 25th June 2005, 06:41 PM   #8
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I meant dollaz.
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