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30th October 2002, 11:48 PM
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#1 |
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diyAudio Member
Join Date: Jan 2001
Location: Ruhrgebiet
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New aleph pcb design
Hi!
Recently made the decision to join the “Aleph club”. Although there is some very interesting pcb artwork out there, I couldn’t resist to try an own approach. This is where it ended up until now. The board is meant to be an Aleph 5 (3 FETs paralleled, but the design can very easily be scaled for other Aleph models. The board measures 100 x 81 millimeters (4 by 3.2 inches) and seems to be the most compact solution so far. It is, as usual, a single layer layout and I am a little proud to say that I succeeded completely without addditional wiring. The amplifier output stage is located on the left, the current source power stage on the right side. I tried to keep the signal path as short as possible, there are for example only 54 millimeters from the speaker output terminal to the inverting input gate of the differential pair. The diff pair may be thermally coupled, I placed the FETs back to back.. All power resistors will be Isaplan metal foil types, I’ve had some good expereiences with those. If it turns aout to be necessary, they can be mounted on a heatsink – a strip of aluminum may be sufficient. As you can see from the artwork, I separated high from low current traces on both supply rails and the output wherever possible. By now, the component numbering doesn’t match the standard from the aleph manual, I will change that in the future. At the moment, all this is nothing but pure theory, and I am convinced there are a lot of errors on that design I don’t recognize at the moment, perhaps you do? Tell me what you think! Schematics: 
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30th October 2002, 11:50 PM
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#2 |
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diyAudio Member
Join Date: Jan 2001
Location: Ruhrgebiet
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Component layout and names:
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30th October 2002, 11:51 PM
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#3 |
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diyAudio Member
Join Date: Jan 2001
Location: Ruhrgebiet
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Component values and artwork:
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30th October 2002, 11:53 PM
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#4 |
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diyAudio Member
Join Date: Jan 2001
Location: Ruhrgebiet
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Artwork only:
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31st October 2002, 12:09 AM
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#5 |
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Banned
Join Date: Apr 2002
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31st October 2002, 12:16 AM
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#6 |
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diyAudio Member
Join Date: Jan 2001
Location: Ruhrgebiet
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On it's way...
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31st October 2002, 12:39 AM
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#7 |
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diyAudio Member
Join Date: Mar 2002
Location: Daly City California USA
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Can you please send me a copy of the art work on a smaller size
at nbaula@concentric.net . Thank you |
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31st October 2002, 12:58 AM
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#8 |
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diyAudio Member
Join Date: Jan 2001
Location: Ruhrgebiet
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Changed the pics for smaller ones. HTH.
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31st October 2002, 01:53 AM
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#10 |
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Banned
Join Date: Apr 2002
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