Rebuilding Williams Defender Power Board - Heatsinks replacement

tmcw

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Rebuilding Williams Defender Power Board - Heatsinks replacement

Got a Williams power supply board recently, board is in good shape (better than my own one), but it was harvested for parts, including the 2 heatsinks.

I was wondering if anyone had ever done (or seen) any DIY job to make some heatsinks to do the job? I'm thinking cut and shaped metal PC cabinet sides with hefty UPS heatsinks attached?

Also, the 3 LEDs were missing as well, the schematics are pretty vague about them, will any LEDs do, or do I need to find anything in particular (or avoid anything specific)?
 
had ever done (or seen) any DIY job to make some heatsinks to do the job? I'm thinking cut and shaped metal PC

i crazy glued a piece of solid stock aluminum 1" x 1/2" x 3/4" onto a Pac Jr ROM that was real hot and the game quit freezing up. crazy glue probably wasnt the best glue but it hasnt fallen off yet

then i thought a thinner piece of U shaped would be a better sink to wick off the heat from a BAGMAN chip that was real hot too
havent had any problems with it yet but i didnt have problems with it before either. that time i used heatsink goop and hot glued the two ends so it wouldnt fall off
 
Also, the 3 LEDs were missing as well, the schematics are pretty vague about them, will any LEDs do, or do I need to find anything in particular (or avoid anything specific)?

Standard red LEDs will work. I have been replacing some with different colors, just for grins. I have not been able to exactly match the old ones, so now I just replace all three.

The -5V LED is backwards from the other two, despite what is screened on the board. It is |< and not >| as screened.

ken
 
Any heat sink salvaged from a computer such as from a cpu or chipset. I have a ton of them, I always save them. Just a fashion a way to attach it to the board and use some thermal paste. I ended up attaching a HDD fan to the big heat sink on my defender ps,and tapped into the +5, now it doesn't even get the slightest bit warm. Is it necessary? No, but it sure looks cool!
 

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i wouldnt say ANY heatsink - the t03 cases for the trannies used generate a lot of heat, and the thermal conductivity and heat sink area is important - the heatsinks used will have been selected to keep the transistors cool enough under summer heat conditions

if you cant find exact replacements, digikey have equivalent patterns such as:
http://www.digikey.com/product-detail/en/423K/345-1050-ND/340346
or
http://www.digikey.com/product-detail/en/HS03/598-1369-ND/1761993

so measure up the holes in the pcb where they were mounted to get the rectangular dimensions then match one up from digikey or mouser with similar number and size of fins.
dont forget to allow clearance underneath for the transistor wires as well.
if you need exact dimensons, numbers of fins, fin heights (top and bottom) etc , just ask! many can help
 
Any heat sink salvaged from a computer such as from a cpu or chipset. I have a ton of them, I always save them. Just a fashion a way to attach it to the board and use some thermal paste. I ended up attaching a HDD fan to the big heat sink on my defender ps,and tapped into the +5, now it doesn't even get the slightest bit warm. Is it necessary? No, but it sure looks cool!

ps i like that add on heatsink/fan kit! looks perfect!
 
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