Carlos grounding Scheme

kestrel200 · 19th May 2005, 01:51 AM

In an earlier post by Carlos he showed some pictures of a grounding scheme he was using with some BrianGT boards. However I can't seem to find it even though I searched for it. Aslo I'm not sure I completely understood it. Is the attached picture an accurate depiction of waht Carlos was suggesting?

Peter Daniel · 19th May 2005, 03:47 AM

It's been posted here: http://www.diyaudio.com/forums/showt...246#post617246 and it works well, especially with LM4780 boards powered from a common supply.

carlosfm · 19th May 2005, 06:54 PM

Quote:

Originally posted by kestrel200
Is the attached picture an accurate depiction of waht Carlos was suggesting?

Yes, sorta.
Corrected.

kestrel200 · 19th May 2005, 07:42 PM

Quote:

Originally posted by carlosfm

Yes, sorta.
Corrected.

Thanks Carlos!!!!! It's clear now! I was confused about the what you did with the extra pair of the power supply's PG+ & PG- but I see you just leave them empty.

Thx again!

Upupa Epops · 19th May 2005, 08:37 PM

By this method of grounding exist theoreticaly little crosstalk between channels, 'cos any ground wire have zero resistance.

dsavitsk · 19th May 2005, 11:22 PM

Quote:

Originally posted by Peter Daniel
It's been posted here: http://www.diyaudio.com/forums/showt...246#post617246 and it works well, especially with LM4780 boards powered from a common supply.

I guess this is a question for Carlos -- what is the wire you use for the ground wires. I see that it is thick copper, but is it just stripped solid core wire, or is there some other source for it?

-d

PMA · 20th May 2005, 08:29 AM

Quote:

Originally posted by Upupa Epops
By this method of grounding exist theoreticaly little crosstalk between channels, 'cos any ground wire have zero resistance.

I do not understand. You probably mean that no ground wire has zero impedance.

Upupa Epops · 20th May 2005, 09:25 AM

Yes - you know my english

.

carlosfm · 20th May 2005, 06:33 PM

Quote:

Originally posted by dsavitsk
I guess this is a question for Carlos -- what is the wire you use for the ground wires. I see that it is thick copper, but is it just stripped solid core wire, or is there some other source for it?

On the chip boards you can fit 1.5mm solid core copper.
Get those boards close from each other.
Then use a thick solid core wire (1.5~2.5mm) to join the two boards.
Coming from the PSU to the center of that wire I use multi-strand 2.5mm copper.

This is all normal electrical wire, no need to get fancy.

carlosfm · 20th May 2005, 06:41 PM

Quote:

Originally posted by Upupa Epops
By this method of grounding exist theoreticaly little crosstalk between channels, 'cos any ground wire have zero resistance.

Nothing to worry about.
Yes, it's a common PSU for two channels.
Even then, it's still better than using a single LM4780 chip for stereo.

It is also the way to make a silent amp, no hum.
I have been explaining this for years... glad that someone had the brilliant idea to make a sketch.

19th May 2005, 03:47 AM	#2
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	It's been posted here: http://www.diyaudio.com/forums/showt...246#post617246 and it works well, especially with LM4780 boards powered from a common supply. __________________ 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

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
grounding scheme	Leolabs	Solid State	2	12th September 2006 02:43 PM
Grounding Scheme within a DAC	5th element	Digital Source	29	15th June 2004 09:23 PM
PCB Grounding scheme	dexter	Solid State	2	27th May 2001 02:48 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

19th May 2005, 08:37 PM	#5
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	By this method of grounding exist theoreticaly little crosstalk between channels, 'cos any ground wire have zero resistance.

20th May 2005, 09:25 AM	#8
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	Yes - you know my english .