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| A1200 "Custom" Custom chips heatsink | ||
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Description: Construction and addition of a custom aluminium heatsink to the custom chips in an A1200. This heatsink cools Alice, Gayle, Lisa, and Budgie and can be used without any modifications to the RF shield. A low powered laser cutter was used initially to mark out the paths for cutting - Original .dtd file available on request. Picture Stats: Views: 1539 Filesize: 283.49kB Height: 768 Width: 1024 Posted by: Hodgkinson at December 28, 2007, 09:26:19 PM Image Linking Codes
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| Homer Posts:1166 | June 12, 2008, 05:39:48 PM Hmm, there's more to this guy than meets the eye :-) Motorised digi sat here in Mansfield, with educational cams. Trying to get 26E, but its behind a great big tree :boohoo: |
| Hodgkinson Posts:1080 | February 14, 2008, 11:15:09 PM FYI: The .dtd file can also be printed out and marked out by hand ;-) |
| Hodgkinson Posts:1080 | January 09, 2008, 08:10:11 PM Yeah, it is kinda big. A friend gave us the dish when he moved abroad. The dish itself is on an Equatorial (?) mount and can be rotated from the house via a motorised ram. We can get Astra and a good mix of the foreign analogue stations, as well as the Sky signals with a second LNB bodged onto the dish at an angle to the focal point. |
| weirdami Posts:3776 | January 09, 2008, 08:31:51 AM Mega dish in the back yard, huh? |
| Hodgkinson Posts:1080 | December 30, 2007, 01:56:14 PM I actually looked at some RAM heatsinks, but I figured it would be more interesting to construct my own heatsink. Besides, its impossible to fit heatsinks with fins under the RF shield near the HDD caddy, so this is the only solution that can cool custom chips in that area. Btw, the thermal compound that I used was the only stuff that I had at the time. Besides, the stuff I used is non-conductive and therefore a lot less risky to use than a silver based (Presumably conductive) compound - The gap between the pins on the IC's and the top of the IC's is dangerously small. One tip re heatsinks - Photograph the writing on the IC's before mounting the heatsinks, as somewhere I've heard of certain mods being sensitive to the custom chip revisions; and with the heatsink mounted, reading the markings becomes rather more difficult. Hodgkinson. |
| cv643d Posts:1197 | December 29, 2007, 04:10:29 PM You should have used Arctic silver thermal compound. And there are very tiny small heatsinks around you can mount on chips. |
| Hodgkinson Posts:1080 | December 29, 2007, 12:38:45 PM When I ran a AGA demo in 31Khz DblPAL, Alice heated up extremely quickly. I'd also heard of the overheating issues causing gfx errors, so I thought that would be sufficient an excuse to go and make this heatsink. :-D |
| rkauer Posts:3263 | December 29, 2007, 03:54:38 AM @Adonay: Even if the custom chips barely goes warm, it's a nice idea to cool them down. Amiga chips don't grow in trees, you know.:roll: |
| adonay Posts:1144 
| December 29, 2007, 03:07:36 AM I dont think this is needed even after playing clickboom quakeAGA on my amiga 1200 with apollo 060@80mhz the chipset is bearly warm. And belive me the Apollo "80Mhz" 060 will torture it more than a 1230 ever could .. Nicely executed though this mod although i dont see the need for it... :-o |