Aleph 1.7 PCB

loovet · 26th October 2002, 11:33 AM

This is my first thread on this forum...

I’m on my way to build an Aleph 1.7. And I would like to have some comments on the PCB layout I’ve done, my first one ever.

When drawing the prototype I prefer to do it with thin tracks, the final version will have broader ones.

/loovet

skaara · 26th October 2002, 09:08 PM

I would split the psu and preamp.

audioPON · 28th October 2002, 02:29 PM

Nice work... but....

It seems like you have mixed something with the input and output signal.. Both input + / - are shorted with the ouput over R72 and R57.. The input signal also seems to be connected with C15,C16 and C14.. respective on the other phase..

I think you have placed the input at wrong place... it should be placed to R6 and R5

I think I would try to get som more space around the FET's. Easier to put some heatsinks on them.

Input/Output GND is connected with R3.. ??

I'm also working on a Aleph 1.7... Drawing it for 2-layer PCB, not wery easy.

>Per Olav

loovet · 29th October 2002, 02:46 PM

Thanks for the responds…

skaara: you are so right, to make the hole thing more flexible, I will separate the preamp and the PSU.

audioPON: you are so right too
- I have put the inputs at wrong places; the inputs should be at R5 and R6.

- I have considered more space around the FET’s. But since I will use Mcap capacitors, and these are not that small, I find it difficult to get this space. Do you have any ideas? First I’ve hade a thought about make it a double side one. But since this is my first project I was recommended to not.

- R3 symbolizes the pot that controls the gain of each channel. Are you going to have this pot or will you put a fixed resistor instead. And if so, which value will the resistor have?

/loovet

audioPON · 30th October 2002, 06:18 AM

I am not shure how much heat must be dissapated, maybe it is enoght with a alu. strip that is formed like an S og U...

I will keep the R3 pot.

loovet · 16th December 2002, 08:19 PM

any coments?

/loovet

nickgreek · 18th December 2002, 02:26 PM

Nice work loovet
I am working on a Aleph 1.7 here is my prototype

Mark A. Gulbrandsen · 19th December 2002, 12:09 AM

Nick, Looks nice, what type of coupling caps did you make room for there?
Mark

loovet · 19th December 2002, 08:43 AM

Nick, I think that you have done a nice work too.

How have you done the design, which program are you using?

/loovet

nickgreek · 19th December 2002, 03:27 PM

Hi guys!

I using for test WinCircuit 2002
ist Limited version
by http://alain.michel13.free.fr
I have TL mkt 600V 2% Caps

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26th October 2002, 09:08 PM	#2
skaara diyAudio Member Join Date: Jun 2002 Location: Europe, Slovenia	I would split the psu and preamp.

28th October 2002, 02:29 PM	#3
audioPON diyAudio Member Join Date: Sep 2002 Location: Norway	Nice work... but.... It seems like you have mixed something with the input and output signal.. Both input + / - are shorted with the ouput over R72 and R57.. The input signal also seems to be connected with C15,C16 and C14.. respective on the other phase.. I think you have placed the input at wrong place... it should be placed to R6 and R5 I think I would try to get som more space around the FET's. Easier to put some heatsinks on them. Input/Output GND is connected with R3.. ?? I'm also working on a Aleph 1.7... Drawing it for 2-layer PCB, not wery easy. >Per Olav

29th October 2002, 02:46 PM	#4
loovet diyAudio Member Join Date: Sep 2002 Location: Outside Stockholm	Thanks for the responds… skaara: you are so right, to make the hole thing more flexible, I will separate the preamp and the PSU. audioPON: you are so right too - I have put the inputs at wrong places; the inputs should be at R5 and R6. - I have considered more space around the FET’s. But since I will use Mcap capacitors, and these are not that small, I find it difficult to get this space. Do you have any ideas? First I’ve hade a thought about make it a double side one. But since this is my first project I was recommended to not. - R3 symbolizes the pot that controls the gain of each channel. Are you going to have this pot or will you put a fixed resistor instead. And if so, which value will the resistor have? /loovet

30th October 2002, 06:18 AM	#5
audioPON diyAudio Member Join Date: Sep 2002 Location: Norway	I am not shure how much heat must be dissapated, maybe it is enoght with a alu. strip that is formed like an S og U... I will keep the R3 pot.

19th December 2002, 12:09 AM	#8
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	Nick, Looks nice, what type of coupling caps did you make room for there? Mark

19th December 2002, 08:43 AM	#9
loovet diyAudio Member Join Date: Sep 2002 Location: Outside Stockholm	Nick, I think that you have done a nice work too. How have you done the design, which program are you using? /loovet

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