Gack! I'm a klutz! BrianGT kit assembly question.

phoneisbusy · 16th September 2004, 06:46 PM

Hello,

I'm trying to assembly BrianGT's/Peter Daniel's kit as a first project. I've managed to get everything assembled correctly up to soldering the nfb resistor to pins 3 and 8.

During the course of solder pin 8 the clamp slipped and the resistor lead now also touches pin 9. According to the National spec sheet, pin 9 appears to be NC.

Should I try and unsolder the resistor and try again or is it safe to leave it as is? My searches here dug up a debate of whether NC means not connected or do not connect... ( I hope spending 30 mins searching through threads is sufficent).

A quick thank you to Peter Daniels and BrianGT for their patience in answering my questions about the kit.

regards

Dave

SheldonD · 16th September 2004, 07:29 PM

If you look at data sheet it pin 9 is No Connection further you will note that the board itself has no metal to the hole for pin9

So no problem in any way

Franz G · 16th September 2004, 07:30 PM

NC means not connected. No problem.

Franz

phoneisbusy · 16th September 2004, 07:38 PM

To clarify, I soldered the resistor directly to the chip so pins 8 and 9 are shorted. It's been many years since high school electronics so I'm rather insecure about my interpretations of the spec sheet.

I probably wouldn't have posted but one thread mentioned someone connecting all the nc pins of a not chip amp circuit to ground and promptly blew up the chip.

Thanks for the replies.

Dave

Franz G · 16th September 2004, 08:04 PM

Really, dont worry!

I did not look at the datasheet or pin numbers. But: if you connected a NC pin to another pin:

NO PROBLEM!

But: maybe your soldering iron is too big? Or you could easily remove the problem. Don't you think?

Really.
Franz

16th September 2004, 06:46 PM	#1
phoneisbusy diyAudio Member Join Date: Mar 2004 Location: Vancouver B.C.	Gack! I'm a klutz! BrianGT kit assembly question. Hello, I'm trying to assembly BrianGT's/Peter Daniel's kit as a first project. I've managed to get everything assembled correctly up to soldering the nfb resistor to pins 3 and 8. During the course of solder pin 8 the clamp slipped and the resistor lead now also touches pin 9. According to the National spec sheet, pin 9 appears to be NC. Should I try and unsolder the resistor and try again or is it safe to leave it as is? My searches here dug up a debate of whether NC means not connected or do not connect... ( I hope spending 30 mins searching through threads is sufficent). A quick thank you to Peter Daniels and BrianGT for their patience in answering my questions about the kit. regards Dave

16th September 2004, 07:29 PM	#2
SheldonD diyAudio Member Join Date: Feb 2004 Location: North of Toronto	If you look at data sheet it pin 9 is No Connection further you will note that the board itself has no metal to the hole for pin9 So no problem in any way __________________ Sheldon D

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16th September 2004, 07:30 PM	#3
Franz G diyAudio Member Join Date: Jun 2004 Location: Bern / Switzerland	NC means not connected. No problem. Franz

16th September 2004, 07:38 PM	#4
phoneisbusy diyAudio Member Join Date: Mar 2004 Location: Vancouver B.C.	To clarify, I soldered the resistor directly to the chip so pins 8 and 9 are shorted. It's been many years since high school electronics so I'm rather insecure about my interpretations of the spec sheet. I probably wouldn't have posted but one thread mentioned someone connecting all the nc pins of a not chip amp circuit to ground and promptly blew up the chip. Thanks for the replies. Dave

16th September 2004, 08:04 PM	#5
Franz G diyAudio Member Join Date: Jun 2004 Location: Bern / Switzerland	Really, dont worry! I did not look at the datasheet or pin numbers. But: if you connected a NC pin to another pin: NO PROBLEM! But: maybe your soldering iron is too big? Or you could easily remove the problem. Don't you think? Really. Franz

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