how mils for me PCB? - Page 2

samsagaz · 6th September 2004, 03:02 PM

thanks guys....
and thanks for the email peranders

samsagaz · 9th September 2004, 02:02 PM

what abt this PCB? how this looks like?
can someone fix me few things?

jackinnj · 9th September 2004, 02:16 PM

you have to remember that the components need clearance for the heatsink. Not a good idea to mount a resistor, capacitor or connector on the back-side of the LM3886, LM3875 or LM4780.

SheldonD · 9th September 2004, 02:28 PM

Sam: I am confused with your pcb

your pcb has 11 pin connections showing, 4780 has 27 pins

jackinnj · 9th September 2004, 02:32 PM

Shel -- he is working with the 3875 or 3886 -- the point I was trying to make is that you don't have any room for resistors, etc. on the "mounting" side of the operational amplifier due to the clearance for the heatsink. --

samsagaz · 9th September 2004, 02:51 PM

oh, yes, its the pcb for the lm3886, its easy than the 4780 (at least have half of pins)

im making both PCB one for 4780 and other for 3886, i think that 3886 is a little easier than 4780

ok, ill move the resistor/cap

any other comment?

9th September 2004, 02:28 PM	#14
SheldonD diyAudio Member Join Date: Feb 2004 Location: North of Toronto	Sam: I am confused with your pcb your pcb has 11 pin connections showing, 4780 has 27 pins __________________ Sheldon D

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6th September 2004, 03:02 PM	#11
samsagaz diyAudio Member Join Date: Aug 2004 Location: Argentina	thanks guys.... and thanks for the email peranders

9th September 2004, 02:16 PM	#13
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	you have to remember that the components need clearance for the heatsink. Not a good idea to mount a resistor, capacitor or connector on the back-side of the LM3886, LM3875 or LM4780.

9th September 2004, 02:32 PM	#15
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Shel -- he is working with the 3875 or 3886 -- the point I was trying to make is that you don't have any room for resistors, etc. on the "mounting" side of the operational amplifier due to the clearance for the heatsink. --

9th September 2004, 02:51 PM	#16
samsagaz diyAudio Member Join Date: Aug 2004 Location: Argentina	oh, yes, its the pcb for the lm3886, its easy than the 4780 (at least have half of pins) im making both PCB one for 4780 and other for 3886, i think that 3886 is a little easier than 4780 ok, ill move the resistor/cap any other comment?

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