grounding spdif input with Buffalo II

Zapped · 15th March 2011, 09:31 PM

I am building a Buffalo II / IVY III setup and plan to use a BNC connector for SPDIF input to the DAC. Should the body of the BNC connector be isolated from my bare-metal back panel (i.e., from chassis ground potential) with shoulder washers or some similar insulator, or can I just screw the BNC directly onto the bare chassis? I usually use a star grounding scheme and isolate all inputs and outputs from the chassis in my analogue construction projects, but I don't know if digital circuitry has different ground rules (pun intended) for best performance. Please advise.

These are mighty fine looking boards and I can't wait to get this rig running.

ihear21khz · 16th March 2011, 01:51 AM

Isolate the body of the BNC connector from the chassis.

Zapped · 17th March 2011, 04:27 AM

Thanks for the advice, ihear21khz. I'll bore a bigger hole in the back panel and use some nylon shoulder washers to mount the BNC connector.

avr300 · 18th March 2011, 07:11 PM

Or use one like this:

Neutrik - Video - BNC Sockets - NBB75DFIB-P

It's isolated.

Zapped · 21st March 2011, 10:50 PM

Thank you, avr300; that looks like a good alternative. I know Neutrik makes high quality stuff.

15th March 2011, 09:31 PM	#1
Zapped diyAudio Member Join Date: Jul 2002 Location: Seattle	grounding spdif input with Buffalo II I am building a Buffalo II / IVY III setup and plan to use a BNC connector for SPDIF input to the DAC. Should the body of the BNC connector be isolated from my bare-metal back panel (i.e., from chassis ground potential) with shoulder washers or some similar insulator, or can I just screw the BNC directly onto the bare chassis? I usually use a star grounding scheme and isolate all inputs and outputs from the chassis in my analogue construction projects, but I don't know if digital circuitry has different ground rules (pun intended) for best performance. Please advise. These are mighty fine looking boards and I can't wait to get this rig running.

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16th March 2011, 01:51 AM	#2
ihear21khz diyAudio Member Join Date: Feb 2009	Isolate the body of the BNC connector from the chassis.

17th March 2011, 04:27 AM	#3
Zapped diyAudio Member Join Date: Jul 2002 Location: Seattle	Thanks for the advice, ihear21khz. I'll bore a bigger hole in the back panel and use some nylon shoulder washers to mount the BNC connector.

18th March 2011, 07:11 PM	#4
avr300 diyAudio Member Join Date: Sep 2005 Location: DK	Or use one like this: Neutrik - Video - BNC Sockets - NBB75DFIB-P It's isolated.

21st March 2011, 10:50 PM	#5
Zapped diyAudio Member Join Date: Jul 2002 Location: Seattle	Thank you, avr300; that looks like a good alternative. I know Neutrik makes high quality stuff.