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Old 1st January 2012, 12:16 AM   #111
Luke is offline Luke  New Zealand
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Nice work guys.
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Old 1st January 2012, 07:35 AM   #112
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Metal and Rudi,
Is it possible to use plated trough pads for the output trannies?This way we can solder them at the silkscreen.If already done,sorry for the question.
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Old 1st January 2012, 10:41 AM   #113
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Thanks Luka.

meanman, both PCBs will be double-sided, this means plated thru-hole.
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Old 1st January 2012, 11:35 AM   #114
roender is offline roender  Romania
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Rudi and Metal,

Nice job till now ... keep up!
Q: Your plan is to use only one power supply for both channels? I do not recommend that.
What's the point in making large power supply lines, grater than speaker lines? Both should have the same current capabilities

Happy New Year!
Mihai
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Old 1st January 2012, 12:39 PM   #115
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I need this PSU to be versatile, this is why you see more than one spade and pad where you expect only one, it will not only be dedicated for this amplifier. So thick lines were used, also larger caps supported.

Having a shunt-reg is a plus on the same PSU PCB, really nice.
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Old 1st January 2012, 07:42 PM   #116
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I quite like the idea of using the power supply for another project. How hard is it to change the voltage for the frontend?
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Old 3rd January 2012, 09:27 PM   #117
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Default Good news

Finally, the amplifier PCB is finished, no more changes will be carried out (I hope!)

Still there are few things I have to finish on the PSU PCB after Rudi and I talk about them, and then we are done!

I hope that these PCBs find their way into DIYers hearts
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File Type: png AMP.png (194.5 KB, 557 views)
File Type: png PSU.png (191.2 KB, 518 views)
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Old 4th January 2012, 07:11 AM   #118
roender is offline roender  Romania
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What's the point in making large power supply lines, to the power BJTs, grater than speaker line?
Both should have the same current capabilities
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Old 5th January 2012, 12:15 PM   #119
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Gentlemen,

METAL and I finished the layout of both the AMP- and the PSU - PCB and we are currently inspecting the GERBER files
that result from the EAGLE - .brd files.

Click the image to open in full size.

http://www.abload.de/img/fc-amp-gerbvmhlpr.png

I checked the underlying schematics twice, compared it with ZDR's schematics and with Mihai's Spice - file:
I am very sure that the wiring is correct.

How shall we go on now?

Mihai suggested to prototype the PCBs before offering them to the community.
The minimum number of PCBs that I can order in the aimed quality is 10.
The price for an AMP PCB (size: 136 x 74mm) is 14.50€ then; the price for a PSU PCB (size: 162 x 87mm) is 15.50€.

Do you think that prototyping is necessary?
If so: will there be 4 of you (besides me) who are willing to evaluate METAL's and my version of Mihai's amplifier and buy 2 pcs of each PCB?

What colour should the PCBs have? Red, green or blue soldermask colour with white silkscreen or do you want something special for this AMP?
Black and white or white and Black?

Best regards - Rudi_Ratlos
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Old 5th January 2012, 01:17 PM   #120
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Black board red silkscreen
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