My first Passlab - Aleph X 100w

[Disme]

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.

 

[Zen Mod]

why don't you ask (all those things) seller of pcbs ?

 

[AndrewT]

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?

 

[Disme]

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.

 

[Zen Mod]

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

 

[pcb121055]

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.

 

[Melon Head]

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

 

[AndrewT]

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.

 

[Disme]

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.

 

[Disme]

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...

 

[oiphy]

I did the same a while ago..ended with me throwing away the ebay boards..... dont think youll get any help here,, sorry,,

however buy some boards from the shop here and learn .....
bet everyone will help you.

stig

 

[Zen Mod]

I already pointed where to look for excellent info

 

[Zen Mod]

Eric's A X tutorial