Nice polish Gainclone

peranders · 8th February 2005, 11:19 AM

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...

jacco vermeulen · 8th February 2005, 11:44 AM

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.

GNAKED · 8th February 2005, 11:55 AM

Hi

See also http://www.audiostereo.pl/forum.html polish audio forum

Regards

Mad_K · 9th February 2005, 05:46 AM

Quote:

Originally posted by jacco vermeulen
Howcome it resembles BrianGT's pcb so much ?

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...

carlosfm · 9th February 2005, 04:21 PM

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.

Quote:

Originally posted by Mad_K
Except they messed up the grounding scheme on the psu pcb...

Bad copy.

veteran · 19th February 2005, 11:40 AM

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

veteran · 19th February 2005, 11:46 AM

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.

Peter Daniel · 19th February 2005, 02:01 PM

Quote:

Originally posted by jacco vermeulen
Howcome it resembles BrianGT's pcb so much ?

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?

jacco vermeulen · 19th February 2005, 03:15 PM

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.

Peter Daniel · 19th February 2005, 03:50 PM

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).

8th February 2005, 11:19 AM	#1
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Nice polish Gainclone 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... __________________ /Per-Anders (my first name) or P-A as my friends call me

8th February 2005, 11:44 AM	#2
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	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. __________________ Looks like Sponge Bob has killed another thread.

8th February 2005, 11:55 AM	#3
GNAKED diyAudio Member Join Date: Oct 2002 Location: Poland	Hi See also http://www.audiostereo.pl/forum.html polish audio forum Regards __________________ GNAKED

19th February 2005, 11:40 AM	#6
veteran diyAudio Member Join Date: Feb 2004 Location: Poland	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 __________________ Simple audio solutions blog.unisonus.com

19th February 2005, 11:46 AM	#7
veteran diyAudio Member Join Date: Feb 2004 Location: Poland	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. __________________ Simple audio solutions blog.unisonus.com


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19th February 2005, 03:15 PM	#9
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	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. __________________ Looks like Sponge Bob has killed another thread.

19th February 2005, 03:50 PM	#10
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	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). __________________ 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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