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Old 24th January 2009, 06:59 PM   #21
Bakmeel is offline Bakmeel  Netherlands
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Default Heavy Metal?

Now it's time for some serious heavy metal work.

Below is the Heatsink Assembly. I have 4 of these, 40cm x 50cm x 4cm, with a thermal resistance well below 0.2 K/W each...

As you can see, the mosfets are already pre-assembled, and again the PCB's have conformal coating. There is room for an additional set of fets here, should I find the amp could use an update (however unlikely) It can be done without an entire re-design... Even the holes are already there...


Note the penlight battery, I put it there for scale...
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Old 24th January 2009, 08:19 PM   #22
Bakmeel is offline Bakmeel  Netherlands
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So, after about an hour of struggle to get all the holes properly lined up, and then to secure everything properly, here's a good milestone... Both heatsinks are attached and connected and now I can perform a first test to verify operation.
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Old 24th January 2009, 08:29 PM   #23
Helmuth is offline Helmuth  Netherlands
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Hi Bakmeel,

Will become late to night I believe very exiting moments for you. You will have tested every thing separate I am sure.

succes

(I am chancing the filters of the speakers right now.)
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Old 24th January 2009, 08:45 PM   #24
Bakmeel is offline Bakmeel  Netherlands
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We should play this Aleph on your speakers man, I'm sure that will sound sweeeet...

This is me again performing the first functional tests... everything is working great... the switch on is still quite a "thump" for the mains, and you can see the lights flicker sometimes heheh...

In the front you can see the high-power dummy load I use for testing.. it saves me a lot of speakers this way...

I should here also acknowledge my sweet girlfriend... I'm the most lucky DIY audiophile in the world with a girlfriend actually helping me building these monsters... The dummy load is her work.
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Old 24th January 2009, 09:02 PM   #25
Helmuth is offline Helmuth  Netherlands
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Good plan bakmeel,

I can bring the Fatboy when we are going to barbecue at your place whit your formal colleague's. (or shout I say barbecue on it )
I hope it runs on 4Ohm and below.

Now I am listening to a tube amp, but with this speaker I am cures what strong transistor amp would do to it.

Regards, Helmuth
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Old 24th January 2009, 09:23 PM   #26
Bakmeel is offline Bakmeel  Netherlands
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The Aleph 2 should drive 4 ohms perfectly... I've tested it and it can deliver about 78W RMS into 4 ohms. It is much more efficient in 8 ohms however, and delivers about 168W in one channel.

This is my girlfriend wiring up the front button. You can see the front panel is already mounted.
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Old 24th January 2009, 09:49 PM   #27
Bakmeel is offline Bakmeel  Netherlands
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Default The result!

I still need to fix a few wires inside, but I just couldn't wait anymore to see the result.

I've loosely fixed the top, an here it is.... Aleph 2 - number 1! I'll take some better pictures tomorrow in daylight.

Enjoy!
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Old 24th January 2009, 10:23 PM   #28
bees is offline bees  Netherlands
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dude..
awesome...

thumbs up..
some serious DIY p0rn you're posting here...

Sweet
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Old 24th January 2009, 10:43 PM   #29
Bakmeel is offline Bakmeel  Netherlands
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Thanks guys for all the positive replies...

I'm dead beat right now.... It's time to dream up the next project

'nite!
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Old 25th January 2009, 04:12 AM   #30
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Holy cow, Bouke, that is an awesome design!! Make me want to finish my Aleph5 I started building 2 many years ago. I also tried to be creative with the case (containing 3 levels). However didn't think it through all that well, because putting it together will probably be a nightmare.

A well, spring time may be the time to do it.

Youre a lucky b*sterd to have a girlfriend who actually helps you with this (mine only complains about the number of remotes laying around and doesnt give a d*mn about the hardware, Well she has other qualities of course).

Enjoy the fruit of your hard labour, I hope it sounds as well as it looks
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