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Old 21st July 2005, 04:28 PM   #131
Mark Kravchenko --- www.kravchenko-audio.com
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Default More has been said in this post than in a great many others!

Mauro

Thankyou for your design guide. I check in on textbooks from time to time to brush up on some of the ideas you presented.
THey could all learn something from the clear ideas presented.

You have amalgamated into a few lines of text the most valuable rules of PCB design. Excellent work!

Mark
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Old 21st July 2005, 04:48 PM   #132
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Default Still working it out.

Ok, well here is how it it is coming together now. I was having a rough time routing the GND path for the protection circuit, so I used a copper flood but only for that section. If it does not seem good, then I will work to fix that. Otherwise.... well any input is valued.
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Old 21st July 2005, 05:28 PM   #133
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Mauro, Russ:

what about a full ground plane on the other side?
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Old 21st July 2005, 05:32 PM   #134
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Quote:
Originally posted by UnixMan
Mauro, Russ:

what about a full ground plane on the other side?
I thought about that, but I think Mauro seems to recomend a more "organized" gounding approach.

Also, I really want to keep the design single sided, like the original.

Not a bad suggestion though.
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Old 22nd July 2005, 09:55 AM   #135
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Hi Paolo.
I have recommended the use of ground planes separate ( independently from the layer ) because the power sections manage currents in degree of modulates any "virtual ground " and then insert of the errors in the nets of NFB.
In practice I uses was technical of separation used in the A/D and video circuits.
In the digital electronics ( and RF ) is a lot of diffused the practice of the " multi-layer power planes " because is a lot of effective in the "shielding". In audio the "shielding" is less important, but it is a lot of more important the "stability" of the "virtual gnd "...

Naturally this work is a synthesis of compromises...

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Mauro
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Old 22nd July 2005, 12:35 PM   #136
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Default Feedback please. :)

OK, all components on and wired. I have a lot of extra space, bu that does not bother me too much. I can probably optimize the power traces a little (make them a touch shorter). Please let me know what you think.
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Old 22nd July 2005, 12:47 PM   #137
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Default Fixed a couple things

I had a couple of missing traces, and I shortened the big power traces a little.
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Old 22nd July 2005, 12:55 PM   #138
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Default ooops

I had forgotten that I needed to move C34 and C10. Fixed.
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Old 22nd July 2005, 01:12 PM   #139
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How to positioning " to zones " are.
I would connect the GND of the Relay control to the track of power gnd of the Relay contact, to avoid that it current with the relay influences the node ( jumper ) that feeds the signal GND.
After are able strengthens the power track and the signal GND.
If want have wander to line up some component and increase the distance among the pads (isolation)...

Ciao

Mauro
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Old 22nd July 2005, 01:21 PM   #140
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Quote:
Originally posted by mauropenasa
How to positioning " to zones " are.
I would connect the GND of the Relay control to the track of power gnd of the Relay contact, to avoid that it current with the relay influences the node ( jumper ) that feeds the signal GND.
After are able strengthens the power track and the signal GND.
If want have wander to line up some component and increase the distance among the pads (isolation)...

Ciao

Mauro
Thanks Mauro!

I was wondering about my signal GND being used for the speaker protection circuit.

Is this better?
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