jkeny wrote:nige2000 wrote:Can you post a bunch of pics of the ground/earth wiring to help explain
I assume having ground earth wiring done well has far more impact than having a tellus
Your using pure silver in teflon and cotton as earth/ grounding wire?
I'm assuming that if there's no voltage difference between the signal grounds of interconnected devices then the Tellus will have no effect.
i wouldn't bet against it
i think whats doing the harm audibly is signals/currents that cant really be measured in terms of voltage across two points by a multimeter
ive done very little experiments with domestic ac/earth and ground but....
there is sq differences depending on what way gnd/earth is connected/not connected to devices in the audio chain
Adam might elaborate what type of differences he found with gnd methods
for me it affects high frequency, dynamics and noisefloor similar to the effect we find with improving ps
it is a real headwrecker, so i decided id rather take everything off grid as much as possible
there would be no problem filling a whole section on the forum about gnd topics there's its probably as much art as science
But we recently saw in Tony's how connecting/disconnecting signal grounds can cause issues & although we never tried to measure the voltage potential between the signal grounds, I presume the cause of the issues that we had was momentary current spike on these signal grounds.
tonys issues are related to the the two poorly implemented clk mods on his mobo i never got smart enough to fix it
even though tonys on a tellus building quest id bet a fiver that he has not tried unearthing the monitor yet, thats one direct connection from pc gnd to domestic earth
i doubt any of these type gnd/earth mods will fix tonys issue fully
its just a clk mobo circuit mod issue
we did measure the voltage difference on the day, your memory must be failing as it was your suggestion but found nothing
My sense of this is that each device connects signal & earth together at some point - the best point being at the PS ground but when you connect together two device that have this grounding configuration, you end up with more complex mix of interconnected ground circuits & increase the possibilities for ground currents circulating between signal grounds.
yea its something like that
Ground issues become especially tricky when higher speed signals (Mhz, GHz) are being dealt with so when PC's are part of the chain it's not surprising to see ground issues
I think Naim tried to address these issues with their own equipment which seems to pat dividends but when non-Naim devices are connected, ground issues can easily arise.
Edit: @Panda - I think the problem is the use of the word "ground" - it misdirects - consider it the return pathway for all electrical paths be they data signals or power supply, all circuits have a return current. It gets complicated though - as an example when the signal speed gets faster the ground return on a solid ground plane is not the full ground plane, the return current follows the original pathway of the signal pcb trace on the top layer of the PCB (assuming a two layer pcb). So the return current is densest along a pathway that mirrors the signal pcb trace on the top & spreads out from that line. So if you were to put a probe on this ground plane it would have a higher current along this mirrored pathway & gradually less current as you move off this mirrored trace. As you can see this is different from the view that is common, which is that ground is 0V everywhere that you measure it.
I hope I'm explaining this properly?
BTW, I'm not saying I know how the Tellus works, I'm just saying that ground is not a simple concept & inter-device ground complicates matters. If everywhere you saw the word "ground" you substituted "return current" & then looked into the rules that defined return currents at low Vs high speeds, it would become clearer just how unclear it all is :)
mobo clk mods is way off topic here probably explains the confusion :)