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Old 7th April 2004, 09:53 AM   #41
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Hi jean-paul
Thanks for your explanation.
I may actually start building this thing at the weekend.
As it will have a layout inspired by Peters, I think I will call
it a, DanDac..hehe

Cheers


Setmenu
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Old 8th April 2004, 07:37 PM   #42
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Here's my attempt at the same DAC, but with AC power.
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Old 8th April 2004, 07:42 PM   #43
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48V Hammond transformer provides double secondaries (12V ea.), full bridge rectifiers consist of MSR860. After that there is a first capacitors bank, followed by common mode chockes, more caps, series resistors, and finally BG caps at the of the filtering chain. All local bypasses consist of BG N, all regulators are AN800x.

It still doesn't show, but output RCAs will be also PCB mounted. Nice thing about that layout is that it fits inside 3 x 2 aluminum tubing, so chassis construction will be simplified (it's hard to predict how it will sound though)
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Old 8th April 2004, 07:45 PM   #44
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This is a prototype (I will make boards for this soon), so all connections are p2p. However, comparing to my previous attempts, I went one step further and used local ground planes, connected with short 18ga wires. The fuse is soldered.
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Old 8th April 2004, 07:49 PM   #45
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Don't let the lack of PCB to stopp your desire to produce top notch circuit. I believe that this is almost as good (or even better) than a PCB TDA1543 is on the bottom side to simplify the I2S connection (the tree wires in the air).

Also, using copper groundplanes doesn't have to look dead bug style and messy.
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Old 8th April 2004, 08:02 PM   #46
BrianGT is offline BrianGT  United States
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Quote:
Originally posted by Peter Daniel
Don't let the lack of PCB to stopp your desire to produce top notch circuit. I believe that this is almost as good (or even better) than a PCB TDA1543 is on the bottom side to simplify the I2S connection (the tree wires in the air).
A pcb would make it easier to build though...

(layout almost finished, once the ground plane and BNC jack is added)

--
Brian
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Old 8th April 2004, 08:06 PM   #47
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Took me about 2-3 hours to make that p2p layout, so it wasn't that bad. But indeed working with PCBs is much more pleasant, (especially the good ones)
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Old 8th April 2004, 08:13 PM   #48
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What's the difference between the green and the brown veroboards? (except that the first cost the double)
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Old 8th April 2004, 10:05 PM   #49
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Quote:
Originally posted by Bricolo
What's the difference between the green and the brown veroboards? (except that the first cost the double)
It seems like green ones are made of better material. Also, the pads are gold plated (and holes are through plated and smaller), I'm using them only for special projects
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Old 9th April 2004, 04:56 AM   #50
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hi,

is it pass for my PCB layout.

this is test print, any recommend was welcome. I still can improve.

thanks

thomas
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