The Aleph30 PCB layout

[Mark A. Gulbrandsen]

No Boards in Salt Lake City as of yet.....

Mark

 

[Peter Daniel]

The postal service to USA is often unpredictable. I had few cases when it took close to a month for a small package, air mail delivery.

 

[HC]

Hey Peter,

Just received the boards in the post, all intact. Thanks.

Henry

 

[meanman64]

power up my Aleph30

What's the best way to power up my amp. I've 2 toroids of 2x18V- 300VA and 1of 2x18-500VA

 

[BrianDonegan]

I would use the 2 300VA, one per channel.

 

[Peter Daniel]

Here are pdf files of the layout:

 

[Peter Daniel]

And components placement:

 

[JRKO]

great boards Peter

Many thanks

 

[THX1138]

pcb still available

Hi Peter,

I'm wondering if you still have some pcb available. If yes, I'd like to order two. I've just sent you an e-mail but was not sure if the webmail if working correctly.
Regards,
Olivier

 

[Peter Daniel]

I just replied to your e-mail. There approx 4 boards left at the moment. One board is good for two channels.

 

[KevinTams]

hot hot HOT

I thought my amp was very hot. I've never had an amp run this hot before and was a bit nervous so........ I borrowed a few thermistors from work and fastened them onto various components inside and outside the amp, closed it up and played it for 2 hours.
The top of the IRFP240's got as high as 67C, the tab of a 9610 on the differential pair got to 82C, ambient inside the amp was 48C, temp on the hottest spot of the heatsink was 55C.

These readings surprised me as I can barely hold the palm of my hand against the heatsink for more than a few seconds yet the temp on the 240 suggests my heatsinking is OK.

Question: is the tab temp on the 9610 a little high at 82C as the spec says absolute max is 150C at the junction.


BTW fantastic sounding amp

Kev

 

[Mark A. Gulbrandsen]

The boards arrived while I was up in Montana. They look excellent... Great job Peter!

Mark

 

[wilbur-x]

Ultrafast cross atlantic delivery , nice boards indeed.
Peter is the man.
Is there any parts list available to clone ?

 

[KevinTams]

Is there any parts list available to clone ?

Attached is a BoM I used when making mine, it should be fairly obvious.

Kev

 

[Zen Mod]

Re: hot hot HOT

Question: is the tab temp on the 9610 a little high at 82C as the spec says absolute max is 150C at the junction.



Kev

just place one mutual heatsink for both 9610.....even Alu plate is good enough

 

[Mad_K]

Re: hot hot HOT

Question: is the tab temp on the 9610 a little high at 82C as the spec says absolute max is 150C at the junction.


Kev

No problem. Keep the junction below 100'C and your're in good shape.
Q1/Q2 junction temp: 82'C + (0,3W x 6,4'C/W) = 84'C

 

[Mark A. Gulbrandsen]

Stupid question from me to all of you so I don't have to go back thorugh all the posts to find out but what type of 1/4 watt resistors this board laid out for? I have yet to use these little doggies yet and am curious.....

Thanks!

Mark

 

[Peter Daniel]

Those are Phoenix SFR16S type: http://dkc3.digikey.com/PDF/T061/1218.pdf
or Caddocks MK132

 

[Mark A. Gulbrandsen]

Thanks Peter.,

That should be the last of my stupid questions....

Mark

 

[Peter Daniel]

The stuffing info was posted here: http://www.diyaudio.com/forums/showthread.php?postid=617068#post617068