Well, you asked for it... I made a new version that accepts balanced inputs and uses the same input circuit as the Aleph 30/60.
The board is 0.1" wider
I can't take screenshots here very well, so I created a pdf from the gerber files with Pentalogix Viewmate and attached the pdf. The pdf shows both layers, green = bottom layer, red = top layer
Any comments?
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Brian
The board is 0.1" wider
I can't take screenshots here very well, so I created a pdf from the gerber files with Pentalogix Viewmate and attached the pdf. The pdf shows both layers, green = bottom layer, red = top layer
Any comments?
--
Brian
kilowattski said:
Exactly.. I am still away now in Pennsylvania, but I brought my laptop, and had a chance to use the net at my uncle's house.
Here is another picture of the layout, taken the same way as the previous shots:
An externally hosted image should be here but it was not working when we last tested it.
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Brian
Member
Joined 2002
jleaman said:
Yes, for unbalanced, the input goes into the +IN. View the schematic here:
http://www.passlabs.com/downloads/old product/a30manr0.pdf
or
http://www.passlabs.com/downloads/old product/a60manr0.pdf
The resistor numbers are not all the same, but the circuitry is the same.
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Brian
Billc said:
Thanks. Here is a pcb with output boards attached to it to form a pcb set:
An externally hosted image should be here but it was not working when we last tested it.
The thicker pink lines indicate scoring, so the board can be broken apart. (as far as heat dissipation, they would have to be broken apart for larger powered amplifiers)
The resistors on the output boards are 2 - 2w resistors in parallel, which deviates from the single 3w resistors used in the production Aleph amps.
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Brian
BrianGT said:
wow, excellent! Now this is exactly what I was looking for! Is there an esitmate for when we can order? 🙂
pdf of current board layout (will print actual size if scaling is disabled)
I would anticipate 1-2 more weeks to finalize the board layout and order prototypes, and then another couple of weeks to get boards made.
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Brian
I would anticipate 1-2 more weeks to finalize the board layout and order prototypes, and then another couple of weeks to get boards made.
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Brian
Hi Brian-
Would the pwr supply board from the LM3886 kit be sufficient for one channel of this?
The boards look great, and I would like to maintain the elegance through the pwr PCB's also..
Would the pwr supply board from the LM3886 kit be sufficient for one channel of this?
The boards look great, and I would like to maintain the elegance through the pwr PCB's also..
rabstg said:
I have a new power supply board that I created for this, with more capacitance. My current idea is stay close to the service manual schematic, with 2-3 - 35mm snap-in caps per rail, and a single bridge rectifier, created with discrete diodes.
If the power supply boards are small enough (2 caps per rail makes them reasonably sized), then they could be added to the pcb set. I think that a single pcb with scoring could be created to accomidate 1 main board, 2 output boards and 1 power supply board.
As far as a CRC/CLC setup, nothing has been created yet. Any suggestions for implementation?
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Brian
Member
Joined 2002
Whens the Group Buy .. Brian i'm home tonight at 10pm my time if your up ill email you and we can talk about stuff.
jason...
jason...
Member
Joined 2002
WOnder how hard it would be brain to build a nice regulated board for this power supply.....
it's so nice to see how much this little amp's that i was interested in long time ago but you were not has come...
it's so nice to see how much this little amp's that i was interested in long time ago but you were not has come...
You could easily use Digi01's LM338 boards for this, the current and voltage is well within their specs.
If this buy goes forward I am in for some amp boards and planned to use these regs.
If this buy goes forward I am in for some amp boards and planned to use these regs.
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