My first Passlab - Aleph X 100w - diyAudio
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Old 24th May 2012, 10:31 AM   #1
Disme is offline Disme  Denmark
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Default My first Passlab - Aleph X 100w

Hi.
I have just bought PCBs for Aleph X 100w.

eBay - The UK's Online Marketplace


But I'm not sure about several things among other:

Which of the resistors is important to match?

I have ordered 8 x quratet matched IRFP240, a total of 32 units.
But how should they be placed on the 4 output prints that are to each amplifier?

I hope that some of all your clever pass labs builders can help me.
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Old 24th May 2012, 12:25 PM   #2
Zen Mod is offline Zen Mod  Serbia
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why don't you ask (all those things) seller of pcbs ?
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Old 24th May 2012, 12:41 PM   #3
AndrewT is offline AndrewT  Scotland
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The Seller is selling you a PCB. He must offer some level of customer support.

If the price you paid is so low that the customer support is zero, then what good is that ultracheap, but unusable PCB?
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Old 24th May 2012, 12:55 PM   #4
Disme is offline Disme  Denmark
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Quote:
Originally Posted by Zen Mod View Post
why don't you ask (all those things) seller of pcbs ?
I already done that. He wrote:
Being a balanced amplifier, the mosfet and some of the resistors have to be matched for optimum performance. Since aleph-x has become a legendary project with a lot of information on the web( in particular in diyaudio forum), we do not intend to copy all those information and pass along to our customer.
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Old 24th May 2012, 01:19 PM   #5
Zen Mod is offline Zen Mod  Serbia
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read last few pages of A X thread

you'll find all necessary info there , primary links for excellent on line tutorials for building it
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Old 24th May 2012, 01:25 PM   #6
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Hi Disme. Went to the link in your post and didn't see any mention of a schematic. Have you read the Aleph X build thread sticky? Pretty big thread, should be useful.
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Old 24th May 2012, 01:26 PM   #7
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You would have been better off purchasing the boards from a DIYAUDIO member.
When you buy from the forum you often get a product that has the combined effort of 30 people or more who are anal lunatics when it comes to perfecting a design
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Old 24th May 2012, 01:47 PM   #8
AndrewT is offline AndrewT  Scotland
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One buys the product and get what one pays for.

That includes the customer support.

Destroyer and I have both said that we abhor the lack of customer support being given by these Chinese fakes. DX has gone further, he has publicly stated he will not support any of the buyers of fake PCBs.
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Old 24th May 2012, 06:59 PM   #9
Disme is offline Disme  Denmark
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Quote:
Originally Posted by pcb121055 View Post
Hi Disme. Went to the link in your post and didn't see any mention of a schematic. Have you read the Aleph X build thread sticky? Pretty big thread, should be useful.
The shop has now send me a schematic and a partlist. but I still need to find out which components thats importent to match.
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Old 24th May 2012, 07:06 PM   #10
Disme is offline Disme  Denmark
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Quote:
Originally Posted by Melon Head View Post
You would have been better off purchasing the boards from a DIYAUDIO member.
When you buy from the forum you often get a product that has the combined effort of 30 people or more who are anal lunatics when it comes to perfecting a design
I did not know this forum or that I could buy PCBs here before I already bought the other ones...
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