The Aleph30 PCB layout

[Peter Daniel]

Those copper plates are used both to connect two pieces of heatsinks and to spread the heat more evenly.

However, they are not neccessarily required.

 

[BrianDonegan]

I was origianlly going to arrainge things a bit differently, but it evolved into what you see there. Once the copper was machined up, it seemed silly to not use them.

 

[jleaman]

I was origianlly going to arrainge things a bit differently, but it evolved into what you see there. Once the copper was machined up, it seemed silly to not use them.

I don't like the idea of all that in one case. How come you did this ?

 

[meanman1964]

Those copper plates are used both to connect two pieces of heatsinks and to spread the heat more evenly.

However, they are not neccessarily required.

So,it isn't needed?I only want to connect my fets in the middle of the sink.I was wondering if I may use wires to connect the fets,can I?

 

[meanman1964]

What do you think about those sinks,are they ok.It's possible that I use a fan,but is that needed?Do I have to anodise them even when I want to use a fan?

 

[meanman1964]

Here another image.The dimensions are 10.6''x4.8''x2.4''.
I have four of them for my Aleph 30.And four more for other projects.

 

[BrianDonegan]

I don't like the idea of all that in one case. How come you did this ?

I don't either, too much heat in a small space. It was an idea that didn't happen. The A30 is the A30, the X-BoSoZ is in it's own case with attenuator and source selector.

(pre wire-up pic)

An externally hosted image should be here but it was not working when we last tested it.

 

[peterpan]

Hello Peter, will your S&B stage GC Itergrated be availabe in finnished product, like the GC intergrated? I'll be waiting.

 

[Peter Daniel]

The S&B Integrated, if ever available, won't be cheap, considering that it combines two Patek amps and Pre-T1 preamp with remote volume control. I can produce it right now, but the price will be in range of $5000.

 

[Peter Daniel]

So,it isn't needed?I only want to connect my fets in the middle of the sink.I was wondering if I may use wires to connect the fets,can I?

What do you think about those sinks,are they ok.It's possible that I use a fan,but is that needed?Do I have to anodise them even when I want to use a fan?

This should work fine and connecting fets with wires will help in better heat distribution. Two of those heatsinks per channel may work, but it will also depend on your actual PS voltage. Even 2 V make a difference in produced heat so try not to exceed it too much.

 

[pinkmouse]

Hello Peter, will your S&B stage GC Itergrated be availabe...

Please can you post questions like this in Peter's commercial thread in the AVB. Thanks.

 

[meanman1964]

This should work fine and connecting fets with wires will help in better heat distribution. Two of those heatsinks per channel may work, but it will also depend on your actual PS voltage. Even 2 V make a difference in produced heat so try not to exceed it too much.

What's the right dc voltage for the amp?
And what about anodise the sinks?Is that needed?
And what about one sink with a fan?

 

[Peter Daniel]

The manual specifies +/- 25V rails. Depending on your particular transformer you may get more or less in actual supply voltage. That will affect the generated heat. If you heatsinks are rather small, it's better to use 2 x 18V AC transformer.

You don't need to anodize heatsinks, if appearance is not your concern.

Forced air usually improves efficiency by a factor of 2, so you may try one heatsink with a fan as well.

 

[meanman1964]

Thanks Peter,but I tought that when you take a higher psu voltage you could lower the bias,or am I wrong?

 

[BrianDonegan]

I am using 16V trafos with the heatsinks in the picture above. They get to be about 45-50C

 

[Peter Daniel]

Sure, you can lower the bias as well.

 

[meanman1964]

I am using 16V trafos with the heatsinks in the picture above. They get to be about 45-50C

Do you mean your heatsinks?

 

[BrianDonegan]

😉 yes, the heatsinks.

 

[jleaman]

Since Brian D has me interested again, is there any one else building these ? Peter is out of stock but if there is enough interest Peter will order more A30 Boards.

J'

 

[meanman1964]

This should work fine and connecting fets with wires will help in better heat distribution. Two of those heatsinks per channel may work, but it will also depend on your actual PS voltage. Even 2 V make a difference in produced heat so try not to exceed it too much.

Peter,
Do I have to wire all six Fets or can I solder 3 Fets onto the board and attache the board to the sink and wire the other 3?What about the gate resistors,could they stay on the board or do they have to be as close to the fets as possible?