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10th April 2005, 08:41 AM
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#131 | |
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diyAudio Member
Join Date: Jun 2002
Location: Italy
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Quote:
try for a pair of ZVP3306A instead of the IRF9610 in the differential pair . 
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11th April 2005, 01:22 PM
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#133 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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I noticed that the post is working really fast recently. The small package I sent to Australia on Friday, was alredy delivered yesterday.
I will be posting some additional info today, with regards to board stuffing.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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11th April 2005, 02:36 PM
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#134 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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All the parts numbers on the board correspond to parts numbers used in the A30 schematic, that can be found in this manual: http://www.passlabs.com/downloads/ol...t/a30manr0.pdf
If you wish to install protection diodes, they mount underneath, and should be installed first. Also, install 2 jumpers. Use either zero ohm jumpers (available from DK) or insulated wire in order to provide some clearance from the power traces (although the mask is there, it never hurts to be cautious).
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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11th April 2005, 02:41 PM
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#135 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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The grounds on board are separated and this allows individual connection to main power point. Some reported improvement, so I decided to make this possible. GND stands for constant current circuit ground and SG marks input ground. In case you don't want to run them separately, install jumper in place marked OPT (optional) and connect both grounds. In this case main ground connection is taken from GND point and signal ground (from from the input) connects to SG point.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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11th April 2005, 02:42 PM
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#136 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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For those who will use only single ended input connection, I provided a jumper space, that connects IN - with signal ground.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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11th April 2005, 02:47 PM
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#137 |
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diyAudio Member
Join Date: Jul 2002
Location: Toronto, Canada
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I configured my test board following recommendations from 2 previous posts (OPT jumper in place) and it was working fine.
There is also an option to configure grounds exactly like in A30 schematic, and here you mount R0 resistor (3ohm) and install R6 with a wider footprint (see the pic, and additional hole for that resistor). There is only one ground connection point on the board now (GND), you don't connect anything to SG, R6 connects directly to GND, all input shunting resistors from positive input connect to GND through R0. There are 4 mounting holes in case you want to move output devices further away from the board. Use plastic standoffs to make sure you don't short any traces.
__________________
www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC |
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11th April 2005, 08:30 PM
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#138 |
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diyAudio Member
Join Date: Sep 2002
Location: Göteborg
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Got my boards today also.
They look great! /Niclas |
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12th April 2005, 04:58 PM
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#140 |
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diyAudio Member
Join Date: Jun 2002
Location: Italy
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G M B today , thanks
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