Exactly, and it's a long antenna. That's why most of the noise is common mode.
Not to mention that the lengths are uncontrolled, so the charge density functional loses coherence.
Not to mention that the lengths are uncontrolled, so the charge density functional loses coherence.
Cable Induced Cyclic AM Noise ?....
Are you saying that according to conductor geometry and dielectric characteristics that a high speed conduction modulation is set up over the cable length, and causing a periodic change (distortion) to signal present at the load end of a cable wrt the signal presented at the source end of the cable....or something like that....or what ? more questions to follow...
Thanks, Dan.
SY said:
Ok, still not clear on what you mean here.
Are you saying that according to conductor geometry and dielectric characteristics that a high speed conduction modulation is set up over the cable length, and causing a periodic change (distortion) to signal present at the load end of a cable wrt the signal presented at the source end of the cable....or something like that....or what ? more questions to follow...
Thanks, Dan.
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No it's not. It's representing the transformer up on the pole (or rather half of the 240 volt transformer we use for the 120 volts in our homes). Note the 120V at the transformer's secondary. Also read the text. "Standard 120 volt power applied to an RF filter causes leakage current."
Again, unless I'm missing something, it's an accurate representation.
se
There will also be a lot of C between hot and the safety ground. The caps in the filter add to that, increasing leakage currents.
se
Not much, it's used by many professional studios. Great idea that's not always compatible with safety standards.
You guys are just killing me.. 
Neutral tied to chassis could turn quite interesting or lethal if connected to a miswired outlet with a faulty or no ground..
I use floating balanced power for all of my low level analog electronics. All safety grounds are in place. It does measurably reduce leakage currents. I observed (read measured) a few dB reduction in 60Hz pick up in the signal chain, not earth shattering but enough to be worthwhile. I use surplus medical grade isolation transformers and am very well aware that NEMA does not sanction this sort of usage.
Neutral tied to chassis could turn quite interesting or lethal if connected to a miswired outlet with a faulty or no ground..
I use floating balanced power for all of my low level analog electronics. All safety grounds are in place. It does measurably reduce leakage currents. I observed (read measured) a few dB reduction in 60Hz pick up in the signal chain, not earth shattering but enough to be worthwhile. I use surplus medical grade isolation transformers and am very well aware that NEMA does not sanction this sort of usage.
It is not a trivial thing to understand. nor to explain briefly, but it's not a matter of conduction modulation (which is simple in comparison), but truly the coherence of the charge density functional. See, for example, my original paper on the subject, "Interrelations among x-ray scattering, electron densities, and ionization potentials," where the concepts of charge density functionals are quantified within the Hartree-Fock formalism.
Yes, it is indeed representing the pole transformer. What else do you think is meant by "Standard 120 volt power applied to an RF filter..."? Why do you think the transformer's secondary is labeled 120 volts? And when on God's earth do you put an AC RF filter on the SECONDARY of the transformer inside the equipment?
se
You guys are just killing me..
Neutral tied to chassis could turn quite interesting or lethal if connected to a miswired outlet with a faulty or no ground..
Well, since the safety ground is tied to the chassis at one end (i.e. at the IEC inlet), and to neutral at the service panel at the other end, then the chassis is indeed tied to neutral in most systems using 3 pin IEC connectors.
se
That's the primary side of the equipment power transformer which gets (wait for it).... Standard 120V power.
Except that's not how it was intended to be read. It was intended to be read from left to right. Look at figures 4 and 5. It's intended to represent the transformer secondary of the AC mains system.
se
Yes, agreed, regarding the first picture. Unfortunately the coherency doesn't last long.
Half way down the first page he starts muddying the waters by talking about reactive power and harmonic currents. By page 6 he's convinced himself that "balanced power" eliminates these, thus automatically correcting power factor.
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You forgot the flavour mixing matrix elements and the neutral currents, so it won't work too well. Still, not a bad attempt for a mere chemist.SY said:
I think you should write up your ideas, such as they are, for a proper audio journal (not that Dutch engineering comic). You might find that nice Dr. Sokal will be happy to act as co-author.
You're missing the point. SY is never wrong. If that requires certain parts of the article to be read right-to-left, then so be it.
I only read about half way down the first page of the balanced power article, so I never saw the part about improving the national grid by adopting his ideas. I guess three-phase somehow passed him by?
One of the nice things about most people who talk nonsense is that they can't resist the temptation to talk enough nonsense to fully expose just how silly their 'opinions' are. I say 'opinion', because usually what they say is not a matter of opinion or debate but merely wrong. Sometimes it's not even wrong!
If they said much less then many people would be left wondering whether they really have stumbled upon something everyone else has got wrong, but they quickly dispel the benefit of the doubt by talking nonsense about well-known things.
One of the nice things about most people who talk nonsense is that they can't resist the temptation to talk enough nonsense to fully expose just how silly their 'opinions' are. I say 'opinion', because usually what they say is not a matter of opinion or debate but merely wrong. Sometimes it's not even wrong!
If they said much less then many people would be left wondering whether they really have stumbled upon something everyone else has got wrong, but they quickly dispel the benefit of the doubt by talking nonsense about well-known things.
"Lets take an initial look at the problem shown in Figure 1. There is a 120V isolation transformer with a common RF filter typical of many types of equipment."
It's supposed to represent the secondary side of an isolation xformer.
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