Another LM3886 PCB!! - Page 6

digi01 · 28th December 2004, 05:45 AM

non-inverted LM3886,I have mail you the project file(protel version#0.1).

the attached pic,including top layer and bottom layer review.

best wishes
digi

troystg · 28th December 2004, 04:01 PM

Hi digi-

Very nice.

I will look them over this week in between work and then request the files for manufacture.

Thanks again and hope all is well,

Troy

troystg · 30th December 2004, 06:34 PM

Hi All-

Has anyone got a minute to look over digi01's boards?

I looked over them and have not seen any obvious issues but then I don't claim to be an expert in this, just a hobbyist.

Any advice would be appreciated. I will be using multiples of these boards with regulated supplies.

ingrast · 30th December 2004, 09:12 PM

Quote:

Originally posted by rabstg
Hi All-

Has anyone got a minute to look over digi01's boards?

I looked over them and have not seen any obvious issues but then I don't claim to be an expert in this, just a hobbyist.

Any advice would be appreciated. I will be using multiples of these boards with regulated supplies.

Nothing really to be anoyed of.

In my taste the double sided PCB is not really necessary (I have built test amplifiers and measured better than -110 db rel. noise floor with a Creative Labs Audigy II USB module and SpectraLab), but if cost is no major concern, then it is OK, makes for a much better looking board.

The resistor behind the lower pin row may be a liability, if I were asked, should relocate it elsewhere.

Rodolfo

digi01 · 31st December 2004, 12:26 AM

Quote:

Originally posted by ingrast

The resistor behind the lower pin row may be a liability, if I were asked, should relocate it elsewhere.

Rodolfo

do you mean that small cap,Cb? it is a option part,the footprint of pins is 100mil.

ingrast · 31st December 2004, 12:22 PM

Quote:

Originally posted by digi01

do you mean that small cap,Cb? it is a option part,the footprint of pins is 100mil.

I was reffering to "Rn" if I read right.
Anyway if it is soldered on the PCB side opposite to the chip there is no major problem either.

Rodolfo

troystg · 1st January 2005, 12:25 AM

Hi Rodolfo-

I think the name is R"m" for the mute resistor, and it can be placed on top or bottom.

I tend to put it on bottom.

Thank you very much for your comments. They confirm my speculation that digi01 did an outstanding job.

Anyone else? See anything that could be improved?

28th December 2004, 04:01 PM	#52
troystg diyAudio Member Join Date: Apr 2004 Location: Lousy Anna	Hi digi- Very nice. I will look them over this week in between work and then request the files for manufacture. Thanks again and hope all is well, Troy __________________ Troy Thinking positive doesn't make things better, it makes you a better person.

30th December 2004, 06:34 PM	#53
troystg diyAudio Member Join Date: Apr 2004 Location: Lousy Anna	Hi All- Has anyone got a minute to look over digi01's boards? I looked over them and have not seen any obvious issues but then I don't claim to be an expert in this, just a hobbyist. Any advice would be appreciated. I will be using multiples of these boards with regulated supplies. __________________ Troy Thinking positive doesn't make things better, it makes you a better person.

1st January 2005, 12:25 AM	#57
troystg diyAudio Member Join Date: Apr 2004 Location: Lousy Anna	Hi Rodolfo- I think the name is R"m" for the mute resistor, and it can be placed on top or bottom. I tend to put it on bottom. Thank you very much for your comments. They confirm my speculation that digi01 did an outstanding job. Anyone else? See anything that could be improved? __________________ Troy Thinking positive doesn't make things better, it makes you a better person.

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