| peranders |
http://unisonus.com/
The web site was found here when I was checking my own statistics. A very long thread with lot's of pictures.
I see that Peter Daniel is there... |
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| jacco vermeulen |
Howcome it resembles BrianGT's pcb so much ?
Thanks for the link, Per.
It looked like it had a couple of interesting postings there, maybe the ones who track something worthwhile there can link to it on this thread.
Hopefully the ones with a decent knowledge of Polish, i only get 15 percent of it but can have my Polish uncle translate it for me. |
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| Mad_K |
| quote: | Originally posted by jacco vermeulen
Howcome it resembles BrianGT's pcb so much ?
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Maybe because there are not so many ways to make a optimal layout for this sort of circuit? Except they messed up the grounding scheme on the psu pcb... |
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| carlosfm |
| quote: | Originally posted by Mad_K
Maybe because there are not so many ways to make a optimal layout for this sort of circuit? |
That's not the case.
It's just easier to copy.:rolleyes:
| quote: | Originally posted by Mad_K
Except they messed up the grounding scheme on the psu pcb... |
Bad copy.:clown: |
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| veteran |
Hello
Those GC boards was made for Audiostereo Forum. It is basic configuration of LM3875 chip with input (C1) and feedback (C2) caps. It is similar to Peter Daniel GC, but I think this is the optimal routing and components placement for such easy module :) There is everything OK with grounding scheme on the PSU :)
Closer look on the pictures bellow.
There are two types of those board: normal and gold plated. Second one looks very good ;)
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| veteran |
If not the Audiostereo Forum members “pressure” this board would probably look like this :)
You can see that there is buffer/preamplifier and regulated PS. Jumper enables one of possible configuration: basic GC and integrated amplifier.
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| Peter Daniel |
| quote: | Originally posted by jacco vermeulen
Howcome it resembles BrianGT's pcb so much ?
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A line from a movie 'Snatch' comes to mind:
Q: What's inside a car?
A: A wheel and four seats. ;)
Besides having a chip in the middle and 2 caps on the sides, I don't see much resemblance with the other boards.
In some ways the layout is quite innovative and has certain advantages over the boards sold by Brian and me. I would still like to see improvement in resistors placement, but it just me. And why I don't see Zobel there? ;) |
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| jacco vermeulen |
A Car can be an SUV.
But that doesnt make it the original.
The resemblance gave me the idea that the designer took a peek
at your GC, PD. |
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| Peter Daniel |
He definitely took a peek, and incorporated some ideas from the original boards, but what's important, he implemented his own creativity and came up with a design that gives me some new ideas.
So everybody's gaining here. ;)
After all, there's only so much you can do with a chip and four resistors (and two caps). |
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| carlosfm |
I still think that it's not good to have the PSU caps so widely separated.
But of course a single ground point is better. |
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| veteran |
All I can say that I saw PD board but only on pictures – no dimensions were included.
Coincidence in components placement and routing is just natural way of making this easy application of lm3875. So its hard to do this in 100% “my way”. I would like to see pcb for this application done DIFFER ;)
| quote: | | And why I don't see Zobel there? |
There wasn’t enough place for Zobel in tight budget ;)
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| veteran |
| quote: | Originally posted by carlosfm
I still think that it's not good to have the PSU caps so widely separated.
But of course a single ground point is better. |
Yes, I know. Compromises…:( |
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| jacco vermeulen |
| quote: | Originally posted by Peter Daniel
So everybody's gaining here. |
:clown: |
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