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Old 5th February 2007, 02:26 AM   #31
AR2 is offline AR2  United States
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Here is the process of feet making. This was piece of 4" aluminum machined to 3" and now bored for plastic insert, that will protect floor from scratching.
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Old 5th February 2007, 02:53 AM   #32
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My wife did her part and gave me chopping board that ended up chopped.
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Old 5th February 2007, 02:55 AM   #33
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Drilling with all pieces in the background.
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Old 5th February 2007, 02:58 AM   #34
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Finished foot. All that is left is polishing and powder coating. They will be too distracting if left shiny, so I decided to have them black.
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Old 5th February 2007, 03:00 AM   #35
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I am not able to edit previous posts, so here are bigger shots of the work in progress.
I sand blasted sinks that are going to be powder coated.
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Old 5th February 2007, 03:01 AM   #36
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And one more.
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Old 5th February 2007, 03:15 AM   #37
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Surface milling of the heat sink in order to achieve best heat transfer. I will additionally sand this surface with 2500 grit sanding paper for real mirror like surface.
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Old 5th February 2007, 03:24 AM   #38
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AR2,

It looks as if you have a machine shop at your disposal. Maybe you have a smallish granite surface plate too, maybe 12"sq or 18"sq. If you do, when you sand the surface of the heatsinks, put the sandpaper on the plate in a laundry sink and move the heatsink over the paper while running water over it. This will give u a better finish and hold the paper to the plate too.

BTW, The amp is looking great.
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Old 5th February 2007, 03:31 AM   #39
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Thank you Rodd. Yes I do have big granite slab (compliments from Grizzli Industrial) and a small one for the purpose you described.
I have been experimenting with various grits and I completely agree with you. Finishes are much better with water, and wet sending is must with those fine grits. Water prevents loading of the sand paper as well, that otherwise would be wasted in no time.
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Old 5th February 2007, 03:41 AM   #40
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Hi AR2,
Your amplifier looks great! Where did you buy those heatsinks?
How much did they cost?
Thanks
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