Chill-amp page!

fedde · 5th February 2004, 04:57 PM

Last month, I updated most of my webpages. I am happy to announce the new Chill-amp non-inverted chip-amp page!!!
Have a look at: http://www.fedde.tk

Fedde

cm961 · 5th February 2004, 05:17 PM

Nice Job! I made something similiar except I used LM3886s because that's all I had.

Pete

fedde · 24th February 2004, 03:27 PM

Since last week, also DIY kits and PCB's are available!

Fedde

Peter Daniel · 24th February 2004, 03:34 PM

Hi Fedde, nice board and very tight layout. No silkscreening is also an advantage. I bet it sounds very close to 47Labs board, as it looks similar

Are you using any additional mounting holes, you have enough space on the board.

I will finish mine soon. Yesterday, I tried an isolated chip package and I had a feeling it sounded smoother than an uninsulated. Maybe that's one secret to the organic sound of GainCard?

fedde · 24th February 2004, 03:57 PM

Thanks for your compliments

I must admit that the layout is a tiny bit inspired by the (supposed!) 47 Labs design

(though my design allows for anti-parallel BG's...)

I have 30 LM3875TF's here in a tube for the kits, so I might try them soon! Still, maybe the difference is due to the lack of burn-in !?

Fedde

Peter Daniel · 24th February 2004, 03:59 PM

The one that was less burned in (actually brand new, comparing to the one used for few days), seemed to sound better (in insulated case).

fedde · 24th February 2004, 04:01 PM

That was quick

Still, it could be that a burned-in LM3875 sounds more tighter but also less smooth...

Fedde

Peter Daniel · 24th February 2004, 04:07 PM

It could be, but I would also be interested what others observed regarding that. It seems like only very few people used an insualted case, but 47Labs are also using such package (as seen in the pictures). Maybe, after all, there is more to it than only heat transfer issues?

ronc · 24th February 2004, 04:09 PM

I wonder if it would be possible to use a pressure loading bar across the board? Maybe cut away part of the board that was overhang?
I have tried many mounting methods and so far the pressure bar works best (for me). It appears to give better heat transfer and also stabilizes the chip when loaded to a large low resonance mass.I still have about 15 of the T versions left.
ron

fedde · 24th February 2004, 04:16 PM

That is an excellent idea. You could press the PCB to the chip by the bar!

I chose the LM3875TF because I didn't want that people building my kits would burn some components due to short-circuits between the ground and the chip (at -Vdc)! It's better fool proof (and you don't have to buy pads). It would be nice if it even sounds better

Fedde

5th February 2004, 04:57 PM	#1
fedde diyAudio Member Join Date: Jul 2002 Location: Eindhoven, the Netherlands	Chill-amp page! Last month, I updated most of my webpages. I am happy to announce the new Chill-amp non-inverted chip-amp page!!! Have a look at: http://www.fedde.tk Fedde __________________ http://www.fedde.nu, gainclone and non-oversampling DAC audio projects and kits...

24th February 2004, 03:57 PM	#5
fedde diyAudio Member Join Date: Jul 2002 Location: Eindhoven, the Netherlands	Thanks for your compliments I must admit that the layout is a tiny bit inspired by the (supposed!) 47 Labs design (though my design allows for anti-parallel BG's...) I have 30 LM3875TF's here in a tube for the kits, so I might try them soon! Still, maybe the difference is due to the lack of burn-in !? Fedde __________________ http://www.fedde.nu, gainclone and non-oversampling DAC audio projects and kits...

24th February 2004, 04:01 PM	#7
fedde diyAudio Member Join Date: Jul 2002 Location: Eindhoven, the Netherlands	That was quick Still, it could be that a burned-in LM3875 sounds more tighter but also less smooth... Fedde __________________ http://www.fedde.nu, gainclone and non-oversampling DAC audio projects and kits...

24th February 2004, 04:16 PM	#10
fedde diyAudio Member Join Date: Jul 2002 Location: Eindhoven, the Netherlands	That is an excellent idea. You could press the PCB to the chip by the bar! I chose the LM3875TF because I didn't want that people building my kits would burn some components due to short-circuits between the ground and the chip (at -Vdc)! It's better fool proof (and you don't have to buy pads). It would be nice if it even sounds better Fedde __________________ http://www.fedde.nu, gainclone and non-oversampling DAC audio projects and kits...

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5th February 2004, 05:17 PM	#2
cm961 diyAudio Member Join Date: Jun 2001 Location: Peterborough, Ontario	Nice Job! I made something similiar except I used LM3886s because that's all I had. Pete

24th February 2004, 03:34 PM	#4
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Hi Fedde, nice board and very tight layout. No silkscreening is also an advantage. I bet it sounds very close to 47Labs board, as it looks similar Are you using any additional mounting holes, you have enough space on the board. I will finish mine soon. Yesterday, I tried an isolated chip package and I had a feeling it sounded smoother than an uninsulated. Maybe that's one secret to the organic sound of GainCard?

24th February 2004, 03:59 PM	#6
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	The one that was less burned in (actually brand new, comparing to the one used for few days), seemed to sound better (in insulated case).

24th February 2004, 04:07 PM	#8
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	It could be, but I would also be interested what others observed regarding that. It seems like only very few people used an insualted case, but 47Labs are also using such package (as seen in the pictures). Maybe, after all, there is more to it than only heat transfer issues?

24th February 2004, 04:09 PM	#9
ronc diyAudio Member Join Date: Mar 2003	I wonder if it would be possible to use a pressure loading bar across the board? Maybe cut away part of the board that was overhang? I have tried many mounting methods and so far the pressure bar works best (for me). It appears to give better heat transfer and also stabilizes the chip when loaded to a large low resonance mass.I still have about 15 of the T versions left. ron

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