Aleph 2 Board Design

[JayV]

when i get the components from germany i'll include them in the 3d pic... i havent made the layout yet.. i don't want to waste time using wrong footprints...

 

[Mark A. Gulbrandsen]

How much do those heat sinks cost in Euros?
MArk

 

[JayV]

about €100 for 100 cm, 25cm should be just perfect for one channel... the C/W is 0,03 @ 10 litres/minute and 500W (for a 20 cm long cooler)

http://www.elfa.se/pdf/75/07563109.pdf

 

[JayV]

should keep the amp pretty cold

i plan to build one box with pump, radiator, tank, and four transformators, then houses and 45-50V AC to the amplifiers (the caps is in the amp boxes). With this construction it should be easy (and cheap) to make only one safety circuit if the waterflow stops. And its nice to have the transformators a bit away!

http://www.elfa.se/images/highres/h11081.jpg

 

[Mark A. Gulbrandsen]

Actually, I could make that heat sink for just the price of a block of alumnium with the same dinensions and a couple of hours of my time. A 1" thick block could be milled to be relieved like thge one shown, and then both sides bored out for the water channels. For those equipped to do so this would be a very inexpensive thing to do. The block of 1" alumnium would cost me less than 15.00 U.S., and the price for the fittings is pretty trivial.
Mark

 

[JayV]

i wish i had that kind of tools

 

[Mark A. Gulbrandsen]

JayV,
Hows the PCB comming along? I am anxious to build a pair of 2's with your design and a heatsink machined from a piece of solid copper plate.
Mark

 

[JayV]

i just recived the components from germany i'll get to it soon, i just got vacation!

 

[JayV]

new design

I belive i'll make my own heatsinks of copper instead... Size is 75*20*200 mm with 4 10mm holes and brass pipes soldered to it. The pcb is 160*200mm. 10mm space between the pcb and heatsink so the most of the components should fit nice!

 

[JayV]

possible design, a little inspired by tube amps..

 

[moe29]

really nice CAD work there... but where would the copper
tubing enter and exit? underneath the amp? run the tubing
underneath the flooring and up under the amp?

pretty sweet, keep up the work


m.

 

[JayV]

the water input/output is on the back of the steel box that holds the PSU, as well as the input/output, switch, fuse and power connection

 

[Mark A. Gulbrandsen]

Hey,

That design is slicker than the ice on the top of Mt. Olympus!!!
Excellent job!! You can even add a BLUE LED or two in there to compete with the glow bottles orange hue .
Mark

 

[moe29]

sometimes i feel like i'm not doing DIY electronics, but

DIY chasis! I wish i had the skills to work up something

like that, and then build it

 

[JayV]

lack of money is the problem i have so many projects and so little cash.. hehe

 

[moe29]

What would be cool is if you could work up a water cooled Aleph 2
with 3 channels... would be great for home theatre use.

 

[JayV]

why not 7+2 channels hehe damn that would be hot!

 

[JayV]

hey moe!

something like this?

 

[jewilson]

Heat Sink and power Caps

JayV,

You will need about you can get by with 80,000 but a 100,000uf
or more would be better, that depends on the transformer and the load.

In addition, Wakefield or Thermolloy might still make a heat sink similar to you picture. I know they made it a few years back

Jim W.

 

[Mark A. Gulbrandsen]

Just bumping this back to the top...... Hows the board design commin Jay V.?
Mark