kunarx
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Hi John @JohnSwenson
Firstly, thanks for everything !
This includes your knowledge, research, and time for the community.
I have a few questions:
1) I know about grounding the negative of an SMPS but if using the Netgear GS108 switch powered with a linear PS, can / should I ground the negative of the LPS ?
2) How long should an Ethernet cable be? My current set up uses FMC's and a 10 meter fiber cable between then. I was thinking of removing the FMC's and just getting a 10 meter Ethernet cable between the Netgear and the renderer.
Is that too long?
3) I already have some shielded aftermarket power cords. I was thinking of getting some copper braid and make a JSSG and put this over my existing cables, including the interconnects. Do you think this will help or not required.
Thanks again
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John sent me a PM.
His was response to the questions was as follows:
As to the questions:
1: to shunt leakage from upstream LAN gear you need two things: one of the specific switches, and grounding the geroundplane in the switch. The easiest way to do this is to ground the negative of the PS powering the switch, in order to be effective it must be grounded, whether it is an SMPS or linear.
2: this is a toughy, there is no definitive answer. Ethernet is a very robust standard, there is no specific technical reason for one length over another as long as it is less than a couple hundred feet. Length may make a slight difference in sound in some systems, but other things are far more important such as keeping leakage out of a cable near the audio system.
3: Again who knows, there are such a large number of possible variables in any real system there is no way to make a general determination on that. It might matter, it might not. it probably will not make things worse.
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