recent case revisions

cadbike · 15th November 2005, 02:25 PM

I had posted some images of my recent gainclones before, but thought I would share my recent revisions. You can also see the internals on these. They are based on peter's kits. I used quarter inch aluminum stock and quarter inch polycarbonate for the case construction.

cadbike · 15th November 2005, 02:27 PM

another picture

cadbike · 15th November 2005, 02:29 PM

another image

cadbike · 15th November 2005, 02:31 PM

and the last one

opt-e · 26th November 2005, 08:24 PM

Hi cadbike, looks real nice.

I just ordered a 4780 kit from Peter. Wondering where you got your aluminum stock and how much it cost. Did it come with that finish or did you have to finish it yourself? I have no experience with metal work.

cadbike · 27th November 2005, 01:44 AM

I got my aluminum from onlinemetals.com I don't know how much it would cost to do one case only, but I spent about three hundred dollars ordereing from then for 13 amps or enough to do 26 cases. The finish when I received it was more of a brushed finish. But, there were a lot of scratches in it. I would say the pictures I posted here are about halfway through the finishing process. I started with 220 grit paper and wet sanded all the way to 2000 grit. It probably took four hours or so of sanding per case, but once I got it sanded and polished it was worth it. I think my next one I may just sand to 800, then scotchbrite and anodize it though. that one, unfortunately wasn't actually mine.

opt-e · 27th November 2005, 05:21 AM

Thanks. I was actually looking at this same place. Was shipping expensive?

I have two ATX computer PSU cases (one for the amp itself and the other for the power supply) that I'm planning on using as basic shells and adding some nice 1/4 inch aluminum front panels and wood side panels as you did.

What did you use for polishing?

opt-e · 27th November 2005, 05:21 AM

Also, out of curiousity, what kind of connector did you use for your power supply umbilical?

safetyman · 27th November 2005, 06:38 AM

Quote:

Originally posted by cadbike
The finish when I received it was more of a brushed finish. But, there were a lot of scratches in it. I would say the pictures I posted here are about halfway through the finishing process. I started with 220 grit paper and wet sanded all the way to 2000 grit. It probably took four hours or so of sanding per case, but once I got it sanded and polished it was worth it. I think my next one I may just sand to 800, then scotchbrite and anodize it though. that one, unfortunately wasn't actually mine.

cadbike, congrats and it does look good. I am about to start on something similar and have a couple of questions. You did the sanding by hand or with one of those polishing machines? I was thinking of starting off with 350 and finishing with 1500 grit, coz that's the finest I could get my hands on. Do you think it's good enough?

Yeah, and how did you polish it? Appreciate if you could comment.

Mick_F · 27th November 2005, 01:06 PM

1500 grit will make scratches of about 10 micron depth. That will be a nice but not shiny surface. If you want to get a brilliant finish, go up to 2400 or (if you can get it) 4000 grit and subsequent car polish.

Mick

27th November 2005, 01:06 PM	#10
Mick_F diyAudio Member Join Date: Jun 2005 Location: Cologne	1500 grit will make scratches of about 10 micron depth. That will be a nice but not shiny surface. If you want to get a brilliant finish, go up to 2400 or (if you can get it) 4000 grit and subsequent car polish. Mick __________________ No statement here.

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26th November 2005, 08:24 PM	#5
opt-e diyAudio Member Join Date: Oct 2005	Hi cadbike, looks real nice. I just ordered a 4780 kit from Peter. Wondering where you got your aluminum stock and how much it cost. Did it come with that finish or did you have to finish it yourself? I have no experience with metal work.

27th November 2005, 01:44 AM	#6
cadbike diyAudio Member Join Date: Oct 2005	I got my aluminum from onlinemetals.com I don't know how much it would cost to do one case only, but I spent about three hundred dollars ordereing from then for 13 amps or enough to do 26 cases. The finish when I received it was more of a brushed finish. But, there were a lot of scratches in it. I would say the pictures I posted here are about halfway through the finishing process. I started with 220 grit paper and wet sanded all the way to 2000 grit. It probably took four hours or so of sanding per case, but once I got it sanded and polished it was worth it. I think my next one I may just sand to 800, then scotchbrite and anodize it though. that one, unfortunately wasn't actually mine.

27th November 2005, 05:21 AM	#7
opt-e diyAudio Member Join Date: Oct 2005	Thanks. I was actually looking at this same place. Was shipping expensive? I have two ATX computer PSU cases (one for the amp itself and the other for the power supply) that I'm planning on using as basic shells and adding some nice 1/4 inch aluminum front panels and wood side panels as you did. What did you use for polishing?

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