Re: [SlimDevices: Touch] Power plug position

2010-06-10 Thread NewBuyer
JohnSwenson;549005 Wrote: > ...The current flowing through the interconnect shield will induce a > small voltage across the shield, and since at the far end of the cable > the input circuit sees the voltage between the center pin and the > shield, the noise voltage developed across the shield is

Re: [SlimDevices: Touch] Power plug position

2010-06-08 Thread Erik L
There is definitely a "right way" to do this, and in many systems the improvement is huge when all plugs in the system are correctly oriented. Many years ago I used a small pen-like device measuring the electric field from the components. The smaller indication from the "pen" was the correct way t

Re: [SlimDevices: Touch] Power plug position

2010-05-20 Thread JohnSwenson
Jacky;549122 Wrote: > Yes, I heard about this "phenomenon" and tried to check the voltage > differences via a digital voltmeter between the chinch "cold" pin and > ground of the socket while wire disconnected to the amplifier. > I measured a voltage drop of about appr. 77,68V AC same on both plug

Re: [SlimDevices: Touch] Power plug position

2010-05-19 Thread JohnSwenson
Phil Leigh;548980 Wrote: > Never seen this on an SMPS (linear has transformer phasing to consider > which is a real effect - usually on a linear, reversing the > live/neutral will/won't alter the radiated EMI field of the > transformer). Also, the Touch SMPS has no earth... do you mean leakage >

Re: [SlimDevices: Touch] Power plug position

2010-05-19 Thread Phil Leigh
JohnSwenson;548977 Wrote: > I haven't tried it but its certainly possible. One of the significant > contributors to ground loop noise issues is the leakage current through > the power supply (there are ALWAYS leakage currents, they are in the > microamp range but they are still there). Very few p

Re: [SlimDevices: Touch] Power plug position

2010-05-19 Thread JohnSwenson
I haven't tried it but its certainly possible. One of the significant contributors to ground loop noise issues is the leakage current through the power supply (there are ALWAYS leakage currents, they are in the microamp range but they are still there). Very few power supplies are completely symmet