Power Supply for Aleph 4

[Gabster]

I'll be here waiting.

BTW, would it be possible to take/show me picture of our amp?

regards,
Gabriel

 

[macka]

Gabriel,

Its about 1.00 am in the morning so like keep the result short.

Using the approach as per our previous posts (ie like your diagram it works! No hum or buzz.

If fact I had to turn off the fridge in the kitchen to hear the noise from the speakers... only a very faint hiss and very minor hum with my ear about 4 inches from the woofer ( all eighteen inches of it @ 96 db).

I will be delighted to hear (and see) how your Aleph 4 project turns out.

regards

macka

 

[Gabster]

Excellent! 😀 Thanks for supporting my project. Now I can start to build The Thing with peace of mind.

Next step is to find heatsinks with a very high density of fins. Based on my casing limitations, each of the four heatsinks (2 per channel) must be 15"x5"x1.5". Do you think such a heatsink can cool 125W of heat down to an acceptable temperature? What could be a comparison with your Aleph 4? [Note that the heatsinks on the sides will be mounted on a 15"x5"0.5" aluminum flat bar]

I'm affraid I'll have to have those custom made.

best regards,
Gabriel

 

[BrianGT]

For the heatsinks:

Look at this thread:

http://www.diyaudio.com/forums/showthread.php?s=&threadid=2719

I e-mailed wayne to ask about the heatsinks and other stuff, and I got this response for the heatsinks:

> The heatsinks are from:
>
> M & M Metals,
> 908 E. Pioneer Drive
> Irving Texas 75061
> 972-721-7174
>
> Talk to Mike Secor.
>
> What I have is 8 - 9.00" extrusions, profile # MM11645B,
> black anodized.
> You need 4 per amp, they are just under 7" wide.
> You orient the fins vertically.
>
> I paid $14.89 each for 16 (a friend is also making some
> amps and we got the parts from the same place).

That seems reasonable for heatsinks... $60 per channel...

--
Brian
gte619j@prism.gatech.edu

 

[Dustin Haug]

Last summer I picked up a large (~15"x8"x4") chunk of aluminum heatsink for $5 at a local surplus shop. If you have any large corporations, especially that create anything electronic check if they have an "inventory liquidation" type of store. They had tons of old cases and heatsink and sold them for $1/pound.

 

[Gabster]

Geeh, I wanted my amp half the height of this one (5"). Maybe I'll have to reconsider the whole thing. 😡

The heatsinks on this one are about 14"x9"x1.5". Is this overkill?

ciao,
Gabriel

 

[BrianGT]

Nothing is overkill when it comes to the Aleph and heatsinks.

I asked him about this, and he said that they would run a little hot to be commercial units. If you look at the page on passdiy.com, he states the temperature.

I bought some heatsinks for mine, and I was considering the same setup. I got 8 heatsinks that are 8"x9"x2.6" I am planning on the same arrangement.

--
Brian
gte619j@prism.gatech.edu

 

[Gabster]

Well, it seems that if I want to keep my low-profile design I will have to build monoblocks... 🙁